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Freescale Semiconductor DSP56002, User Manual

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SERIAL COMMUNICATION INTERFACE (SCI)

 

MOTOROLA 

PORT C

6 - 11

6.3

SERIAL COMMUNICATION INTERFACE (SCI)

 

The SCI provides a full-duplex port for serial communication to other DSPs, microproces-
sors, or peripherals such as modems. The communication can be TTL-level signals or,
with additional logic, RS232C, RS422, etc. 

This interface uses three dedicated pins: transmit data (TXD), receive data (RXD), and
SCI serial clock (SCLK). It supports industry-standard asynchronous bit rates and proto-
cols as well as high-speed (up to 5 Mbps for a 40-MHz clock) synchronous data transmis-
sion. The asynchronous protocols include a multidrop mode for master/slave operation
with wakeup on idle line and wakeup on address bit capability. 

The SCI consists of separate transmit and receive sections whose operations can be
asynchronous with respect to each other. A programmable baud-rate generator provides
the transmit and receive clocks. An enable vector and an interrupt vector have been in-
cluded so that the baud-rate generator can function as a general-purpose timer when it is
not being used by the SCI peripheral or when the interrupt timing is the same as that used
by the SCI. The following is a short list of SCI features:

• Three-Pin Interface:

TXD – Transmit Data
RXD – Receive Data
SCLK – Serial Clock

• 625 Kbps NRZ Asynchronous Communications Interface (40-MHz System Clock)
• 5.0 Mbps Synchronous Serial Mode (40-MHz System Clock)
• Multidrop Mode for Multiprocessor Systems:

Two Wakeup Modes: Idle Line and Address Bit
Wired-OR Mode

• On-Chip or External Baud Rate Generation/Interrupt Timer
• Four Interrupt Priority Levels
• Fast or Long Interrupts

 

6.3.1

SCI I/O Pins

 

The three SCI pins can be configured as either general-purpose I/O or as a specific SCI
pin. Each pin is independent of the other two, so that if only TXD is needed, RXD and
SCLK can be programmed for general-purpose I/O. However, at least one of the three
pins must be selected as an SCI pin to release the SCI from reset.

 

   

  

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Freescale Semiconductor, Inc.

For More Information On This Product,

   Go to: www.freescale.com

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Summary of Contents for DSP56002

Page 1: ...SER S MANUAL Motorola Inc Semiconductor Products Sector DSP Division 6501 William Cannon Drive West Austin Texas 78735 8598 Freescale Semiconductor I Freescale Semiconductor Inc For More Information O...

Page 2: ...2 2 1 Program Memory Select PS 2 4 2 2 2 2 Data Memory Select DS 2 5 2 2 2 3 X Y Select X Y 2 5 2 2 2 4 Read Enable RD 2 5 2 2 2 5 Write Enable WR 2 5 2 2 2 6 Bus Needed BN 2 5 2 2 2 7 Bus Request BR...

Page 3: ...7 Synchronous Serial Interface SSI 2 10 2 2 7 1 Serial Clock Zero SC0 2 10 2 2 7 2 Serial Control One SC1 2 11 2 2 7 3 Serial Control Two SC2 2 11 2 2 7 4 SSI Serial Clock SCK 2 11 2 2 7 5 SSI Receiv...

Page 4: ...3 11 3 4 6 Bootstrap From Host Mode 5 3 11 3 4 7 Bootstrap From SCI Mode 6 3 12 3 4 8 Reserved Mode 7 3 12 3 5 DSP56002 INTERRUPT PRIORITY REGISTER 3 12 3 6 DSP56002 PHASE LOCKED LOOP PLL MULTIPLICAT...

Page 5: ...R Host Command Pending HCP Bit 2 5 16 5 3 2 2 4 HSR Host Flag 0 HF0 Bit 3 5 16 5 3 2 2 5 HSR Host Flag 1 HF1 Bit 4 5 16 5 3 2 2 6 HSR Reserved Status Bits 5 and 6 5 17 5 3 2 2 7 HSR DMA Status DMA Bit...

Page 6: ...s HA0 HA2 5 31 5 3 4 3 Host Read Write HR W 5 32 5 3 4 4 Host Enable HEN 5 32 5 3 4 5 Host Request HREQ 5 32 5 3 4 6 Host Acknowledge HACK 5 32 5 3 5 Servicing the Host Interface 5 33 5 3 5 1 HI Host...

Page 7: ...2 1 9 SCR Idle Line Interrupt Enable ILIE Bit 10 6 20 6 3 2 1 10 SCR SCI Receive Interrupt Enable RIE Bit 11 6 21 6 3 2 1 11 SCR SCI Transmit Interrupt Enable TIE Bit 12 6 21 6 3 2 1 12 SCR Timer Int...

Page 8: ...ting Mode 6 6 71 6 3 11 Example Circuits 6 74 6 4 SYNCHRONOUS SERIAL INTERFACE SSI 6 76 6 4 1 SSI Data and Control Pins 6 78 6 4 1 1 Serial Transmit Data Pin STD 6 78 6 4 1 2 Serial Receive Data Pin S...

Page 9: ...6 4 2 3 7 SSISR SSI Transmit Data Register Empty TDE Bit 6 6 97 6 4 2 3 8 SSISR SSI Receive Data Register Full RDF Bit 7 6 97 6 4 2 3 9 SSI Receive Shift Register 6 97 6 4 2 3 10 SSI Receive Data Reg...

Page 10: ...4 9 Data Output DO Bit 10 7 7 7 4 10 TCSR Reserved bits Bits 11 23 7 7 7 5 TIMER EVENT COUNTER MODES OF OPERATION 7 7 7 5 1 Timer Mode 0 Standard Timer Mode Internal Clock No Timer Output 7 7 7 5 2 T...

Page 11: ...iod Measurement Mode Timer Mode 5 7 22 APPENDIX A BOOTSTRAP AND ROM CODE A 1 INTRODUCTION A 3 APPENDIX B PROGRAMMING SHEETS B 1 PERIPHERAL ADDRESSES B 3 B 2 INTERRUPT VECTOR ADDRESSES B 4 B 3 INSTRUCT...

Page 12: ...4 8 Mixed Speed Expanded System 4 12 4 9 Bus Control Register 4 14 4 10 Bus Strobe Wait Sequence 4 15 4 11 Bus Request Bus Grant Sequence 4 17 4 12 Bus Arbitration Using Only BR and BG with Internal C...

Page 13: ...5 42 5 22 Host Mode and INIT Bits 5 43 5 23 Bits Used for Host to DSP Transfer 5 44 5 24 Data Transfer from Host to DSP 5 45 5 25 Receive Data from Host Main Program 5 46 5 26 Receive Data from Host...

Page 14: ...19 Synchronous Timing 6 43 6 20 SCI Synchronous Transmit 6 44 6 21 SCI Synchronous Receive 6 45 6 22 Asynchronous SCI Receiver Initialization 6 46 6 23 SCI Character Reception 6 47 6 24 SCI Character...

Page 15: ...ous Clock Timing Diagram 8 Bit Example 6 117 6 60 Internally Generated Clock Timing 8 Bit Example 6 118 6 61 Externally Generated Gated Clock Timing 8 Bit Example 6 119 6 62 Synchronous Communication...

Page 16: ...ter Module Block Diagram 7 3 7 2 Timer Event Counter Programming Model 7 4 7 3 Standard Timer Mode Mode 0 7 8 7 4 Timer Event Counter Disable 7 9 7 5 Standard Timer Mode Internal Clock Output Pulse En...

Page 17: ...8 Command Vector Register CVR B 18 B 19 Interrupt Control Register ICR B 18 B 20 Interrupt Status Register ISR B 19 B 21 Interrupt Vector Register IVR B 19 B 22 Receive Byte Registers B 20 B 23 Transm...

Page 18: ...TOROLA LIST of FIGURES xix List of Figures Continued Figure Page Number Title Number Freescale Semiconductor I Freescale Semiconductor Inc For More Information On This Product Go to www freescale com...

Page 19: ...ous SCI Bit Rates for a 40 MHz Crystal 6 36 6 3b Frequencies for Exact Asynchronous SCI Bit Rates 6 36 6 4a Synchronous SCI Bit Rates for a 32 768 MHz Crystal 6 37 6 4b Frequencies for Exact Synchrono...

Page 20: ...le Page Number Title Number APPENDIX B B 1 B 1 Interrupts Starting Addresses and Sources B 4 B 2 Instruction Set Summary Sheet 1 of 5 B 5 Freescale Semiconductor I Freescale Semiconductor Inc For More...

Page 21: ...Please send your suggestions corrections to the Fax number or Email address above or mail this completed form to Motorola Inc 6501 Wm Cannon Drive West Austin Texas 78735 8598 Attn DSP Applications D...

Page 22: ...sections that you feel need improvement 3 What sections of this manual do you consider most important least important DSP56002 User s Manual Trouble Report Freescale Semiconductor I Freescale Semicon...

Page 23: ...to after the JCS instruction Replace RTI with RTI X Replace FLAG MOVE A R3 with FLAG MOVE A X R3 Page 6 68 Section 6 3 9 third sentence Replace Bits CD11 CD0 SCP and STIR in the SCCR work together to...

Page 24: ...r I O 3 Serial Comm SCI or I O 15 Host Interface HI or I O 16 bit Bus 24 bit Bus External Address Bus Switch Data 24 External Data Bus Switch Control 10 Bus Control Data ALU 24 24 56 56 bit MAC Two 56...

Page 25: ...MOTOROLA DSP56002 User s Manual Addendum 3 Freescale Semiconductor I Freescale Semiconductor Inc For More Information On This Product Go to www freescale com nc...

Page 26: ...1 Yes 2 Reset 000000 Register IPR 23 22 21 20 19 18 16 17 0 0 0 0 0 0 0 0 0 0 SSL1 SSL0 Enabled IPL 0 0 No 0 1 Yes 0 1 0 Yes 1 1 1 Yes 2 SCL1 SCL0 Enabled IPL 0 0 No 0 1 Yes 0 1 0 Yes 1 1 1 Yes 2 SCL1...

Page 27: ...MOTOROLA DSP56002 User s Manual Addendum 5 Freescale Semiconductor I Freescale Semiconductor Inc For More Information On This Product Go to www freescale com nc...

Page 28: ...rrupt Enable 0 Disable 1 Enable Receive Enable 0 Disable 1 Enable Transmit Interrupt Enable 0 Disable 1 Enable Gated Clock Control 0 Continuous Clock 1 Gated Clock Output Flag x If SYN 1 and SCD1 1 OF...

Page 29: ...imer Control Bits 3 5 TC0 TC2 TC2 TC1 TC0 TIO Clock Mode 0 0 0 GPIO Internal Timer 0 0 1 Output Internal Timer Pulse 0 1 0 Output Internal Timer Toggle 0 1 1 X X Undefined 1 0 0 Input Internal Input W...

Page 30: ...its patent rights nor the rights of others Motorola products are not designed intended or authorized for use as components in systems intended for surgical implant into the body or other applications...

Page 31: ...ins The MAIN PROGRAM in Figure 5 25 initializes Page 7 4 Change In Timer Modes 4 and 5 to read In Timer Modes 4 5 and 6 in the first line of the last paragraph Page 7 6 In the second paragraph of sect...

Page 32: ...nal injury or death may occur Should Buyer purchase or use Motorola products for any such unintended or unauthorized application Buyer shall indemnify and hold Motorola and its officers employees subs...

Page 33: ...MOTOROLA 1 1 SECTION 1 INTRODUCTION TO THE DSP56002 Freescale Semiconductor I Freescale Semiconductor Inc For More Information On This Product Go to www freescale com nc...

Page 34: ...6002 MOTOROLA 1 1 INTRODUCTION 1 3 1 2 FEATURES 1 4 1 3 DSP56K CENTRAL PROCESSING UNIT OVERVIEW 1 4 1 4 MANUAL ORGANIZATION 1 5 Freescale Semiconductor I Freescale Semiconductor Inc For More Informati...

Page 35: ...The DSP56002 Technical Data Sheet DSP56002 D provides timing pinout and packaging descriptions see Figure 1 1 This section presents the DSP56002 features Central Processor and central processor instru...

Page 36: ...it Timer Event Counter On chip Emulator OnCE for Unobtrusive Full Speed Debugging Optional Program Security Feature Disables Unauthorized Program ROM and OnCE Access PLL Based Clocking with Wide Input...

Page 37: ...ains the various operating modes that affect the processor s program and data memories SECTION 4 PORT A describes the external memory port its registers and control signals SECTION 5 PORT B describes...

Page 38: ...CH BUS CONTROL EXTERNAL DATA BUS SWITCH ADDRESS DATA 16 BITS 24 BITS PORT A PLL ADDRESS GENERATION UNIT OnCE EXPANSION AREA CONTROL 24 Bit 56K CPU Figure 1 2 DSP56002 Block Diagram Program Control Uni...

Page 39: ...MOTOROLA 2 1 SECTION 2 DSP56002 PIN DESCRIPTIONS Freescale Semiconductor I Freescale Semiconductor Inc For More Information On This Product Go to www freescale com nc...

Page 40: ...IPTIONS MOTOROLA 2 1 INTRODUCTION 2 3 2 2 SIGNAL DESCRIPTIONS 2 3 2 3 ON CHIP EMULATION OnCE PINS 2 11 2 4 PLL PINS 2 14 Freescale Semiconductor I Freescale Semiconductor Inc For More Information On T...

Page 41: ...All unused inputs should have pull up resistors for two reasons 1 floating inputs draw excessive power and 2 a floating input can cause erroneous operation For Functional Group Number of Pins Port A...

Page 42: ...igh impedance state when the bus grant signal is asserted 2 2 2 Port A Bus Control The Port A bus control signals are discussed in the following paragraphs The bus control signals provide a means to c...

Page 43: ...If the BN pin is asserted when the chip is not the bus master this indicates that processing has stopped and the DSP is waiting to acquire bus ownership An external ar biter may use this pin to help d...

Page 44: ...2 D for timing details 2 2 3 Interrupt and Mode Control The interrupt and mode control pins select the chip s operating mode as it comes out of hardware reset and they receive interrupt requests from...

Page 45: ...tiple interrupts also increases 2 2 3 3 Mode Select C Non Maskable Interrupt Request MODC NMI This input pin works with the MODA and MODB pins to select the chip s operating mode and it receives an i...

Page 46: ...he PLL and a set of one power and one ground for the CKOUT pin Refer to the pin assignments in the Layout Practices section of the DSP56002 Technical Data Sheet DSP56002 D 2 2 4 2 External Clock Cryst...

Page 47: ...w H0 H7 become inputs When HEN is deasserted host data is latched inside the DSP Normally a chip select signal derived from host address decoding and an enable clock are used to generate HEN HEN can b...

Page 48: ...ured as a GPIO input pin during hardware reset 2 2 6 3 SCI Serial Clock SCLK This bidirectional pin provides an input or output clock from which the transmit and or re ceive baud rate is derived in th...

Page 49: ...bit rate clock for the SSI when only one clock is being used SCK can be programmed as a general purpose I O pin PC6 when it is not needed as an SSI pin and it is configured as a GPIO input pin during...

Page 50: ...s see SECTION 10 ON CHIP EMULATION OnCE in the DSP56000 Family Manual It is an output when the chip is not in debug mode During hardware reset this pin is defined as an output and is driven low Note T...

Page 51: ...should be well regulated and the pin should be pro vided with an extremely low impedance path to the Vcc power rail PVcc should be bypassed to PGND by a 0 1 F capacitor located as close as possible to...

Page 52: ...r The PEN bit enables the PLL by causing it to derive the internal clocks from the PLL VCO output When the bit is clear the PLL is disabled and the chip s inter nal clocks are derived from the clock c...

Page 53: ...MOTOROLA 3 1 SECTION 3 MEMORY MODULES AND OPERATING MODES Freescale Semiconductor I Freescale Semiconductor Inc For More Information On This Product Go to www freescale com nc...

Page 54: ...AND PROGRAM MEMORY 3 3 3 3 DSP56002 OPERATING MODE REGISTER OMR 3 4 3 4 DSP56002 OPERATING MODES 3 7 3 5 DSP56002 INTERRUPT PRIORITY REGISTER 3 12 3 6 DSP56002 PHASE LOCKED LOOP PLL MULTIPLICATION FAC...

Page 55: ...t vectors and priorities and describes the effect of a hardware reset on the PLL multiplication factor 3 2 DSP56002 DATA AND PROGRAM MEMORY The DSP56002 has 512 words of program RAM 64 words of bootst...

Page 56: ...om the YAB and 24 bit data trans fers to the data ALU occur on the YDB Y memory may be expanded to 64K off chip Note The off chip peripheral registers should be mapped into the top 64 locations FFC0 F...

Page 57: ...ACE FFFF 0 DE and YD BITS IN THE OMR DETERMINE THE X AND Y DATA MEMORY MAPS 01FF 00FF Figure 3 1 DSP56002 Memory Maps EXTERNAL PERIPHERALS EXTERNAL PERIPHERALS EXTERNAL Y DATA MEMORY PERIPHERALS INTER...

Page 58: ...lears the DE bit 3 3 3 Internal Y Memory Disable Bit Bit 3 Bit 3 is defined as Internal Y Memory Disable YD When set all Y Data Memory address es are considered to be external disabling access to inte...

Page 59: ...g enough to allow a clock stabilization period for the internal clock to begin oscillating and to stabilize See the DSP56002 Technical Data Sheet DSP56002 D for the actual timing values When a stable...

Page 60: ...tion 0000 in mode 0 and vectors to location E000 in mode 2 3 4 2 Bootstrap From EPROM Mode 1 The bootstrap modes allow the DSP to load a program from an inexpensive byte wide ROM into internal program...

Page 61: ...d as shown in Table 3 3 Organization of EPROM Data Contents ADDRESS OF EXTERNAL BYTE WIDE P MEMORY P C000 P C001 P C002 P C5FD P C5FE P C5FF CONTENTS LOADED TO INTERNAL P RAM AT P 0000 LOW BYTE P 0000...

Page 62: ...ion 0000 in the bootstrap ROM The boot strap ROM program loads program RAM from the external byte wide EPROM starting at P C000 4 The bootstrap ROM program ends the bootstrap operation and begins exec...

Page 63: ...the boot strap program overlays the interrupt vectors 3 4 3 Normal Expanded Mode Mode 2 In this mode the internal program RAM is enabled and the hardware reset vectors to lo cation E000 The memory ma...

Page 64: ...s program execution starts at the ad dress where the first instruction was loaded The SCI is programmed to work in asynchronous mode with 8 data bits 1 stop bit and no parity The clock source is exter...

Page 65: ...gister The DSP56002 PLL multiplication factor is set to 1 during hardware reset which means that the Multiplication Factor Bits MF0 MF11 in the PLL Control Register PCTL are set to 000 SSI IPL SCI IPL...

Page 66: ...tatus P 0014 0 2 SCI Receive Data P 0016 0 2 SCI Receive Data with Exception Status P 0018 0 2 SCI Transmit Data P 001A 0 2 SCI Idle Line P 001C 0 2 SCI Timer P 001E 3 NMI P 0020 0 2 Host Receive Data...

Page 67: ...st Receive Data Interrupt Host Transmit Data Interrupt SSI RX Data with Exception Interrupt SSI RX Data Interrupt SSI TX Data with Exception Interrupt SSI TX Data Interrupt SCI RX Data with Exception...

Page 68: ...Freescale Semiconductor I Freescale Semiconductor Inc For More Information On This Product Go to www freescale com nc...

Page 69: ...MOTOROLA 4 1 SECTION 4 PORT A Freescale Semiconductor I Freescale Semiconductor Inc For More Information On This Product Go to www freescale com nc...

Page 70: ...3 4 3 PORT A TIMING 4 9 4 4 PORT A WAIT STATES 4 13 4 5 BUS CONTROL REGISTER BCR 4 13 4 6 BUS STROBE AND WAIT PINS 4 15 4 7 BUS ARBITRATION AND SHARED MEMORY 4 16 Freescale Semiconductor I Freescale S...

Page 71: ...memories are external to the chip memory references may require additional instruction cycles because only one external memory access can occur per instruction cycle If an instruction cycle requires m...

Page 72: ...CH EXTERNAL DATA BUS D0 D23 X DATA XD Y DATA YD PROGRAM DATA PD 24 BIT INTERNAL DATA BUSES 24 GLOBAL DATA GD EXTERNAL BUS CONTROL LOGIC BUS CONTROL SIGNALS RD READ ENABLE WR WRITE ENABLE PS PROGRAM ME...

Page 73: ...l inputs require either faster RAM chips or external data buffers to avoid data bus buffer conflicts Figure 4 2 shows an example of external program memory A typical implementation of this circuit wou...

Page 74: ...the development mode an exception fetch to any interrupt vector location will cause the X Y signal to go low when PS is asserted This procedure is useful for debugging and for allowing external circui...

Page 75: ...EMORY 3000 2FFF 2K X DATA MEMORY 27FF 2K Y DATA MEMORY 2000 24 BITS U2 Figure 4 4 Memory Segmentation PS DS X Y External Memory Reference 1 1 1 No Activity 1 0 1 X Data Memory on Data Bus 1 0 0 Y Data...

Page 76: ...ROM RESET FUNCTION FROM OPEN COLLECTOR BUFFER A0 A10 D0 D7 A0 A9 A10 CS WE OE RD PS X Y DS WR CE A0 A10 2716 D0 D23 11 10 2018 55 3 D0 D23 BR HACK MBD301 MODC NMI WT DR Notes 1 These diodes must be Sc...

Page 77: ...clock see Figure 4 6 and Fig ure 4 7 are provided in the DSP56002 Advance Information Data Sheet DSP56002 D This timing is essential for designing synchronous multiprocessor systems Figure 4 6 shows...

Page 78: ...ps These chip select sig nals change the memory chips from low power standby mode to active mode and begin the read access time This mode change allows slower memories to be used since the chip select...

Page 79: ...ecomes an input 3 Wait states are inserted into the bus cycle by a wait state counter or by assert ing WT The wait state counter is loaded from the bus control register If the value loaded into the wa...

Page 80: ...D CS RD D A0 A15 D0 D23 CS CS WE OE CS OE CE OE 6242 15 6242 15 2764 25 2764 25 2764 25 27256 30 27256 30 27256 30 8K x 24 X RAM 150 ns 4 WAIT STATES 8K x 24 Y ROM 250 ns 8 WAIT STATES 32K x 24 P ROM...

Page 81: ...t states are executed until the external device releases the DSP to finish the external memory cycle 4 5 BUS CONTROL REGISTER BCR The BCR determines the expansion bus timing by controlling the timing...

Page 82: ...P memory uses five wait states and the analog converters use 14 wait states Controlling five different devices at five dif ferent speeds requires only one additional logic package Half the gates in th...

Page 83: ...bus access and provides another means of halting the DSP at a known program location with a fast restart The timing of the BS and WT pins is illustrated in Figure 4 10 Every external access BS is ass...

Page 84: ...ct additional bus masters which may be additional DSPs microprocessors direct memory access DMA controllers etc to the port A bus They work together to arbitrate and determine what device gets access...

Page 85: ...wever the data lines will remain in three state All signals are now ready for a normal external access During the wait state see Section 7 in the DSP56000 Family Manual the BR and BG circuits remain a...

Page 86: ...l the bus 4 DSP 2 accesses the bus for block transfers etc at full speed 5 To release the bus DSP 2 sets OUT2 0 BR 2 0 after the last external access 6 DSP 2 then sets OUT1 1 BR 1 1 to return control...

Page 87: ...BANK DSP56002 1 DSP56002 2 BUS ARBITER Figure 4 12 Bus Arbitration Using Only BR and BG with Internal Control DATA TRANSFERRED OUT1 1 2 3 4 5 6 7 IN1 OUT2 Figure 4 13 Two DSPs with External Bus Arbitr...

Page 88: ...that BR 2 is deasserted Hence BG of DSP 2 is deasserted which three states the buffers giving DSP 2 control of the memory 16 SYSTEM MEMORY 32K x 24 X DATA RAM 32K x 24 Y DATA RAM 32K x 24 PROGRAM RAM...

Page 89: ...enables the three state buffers placing the DSP 1 signals on the memory bus Asserting BG also deasserts WT which allows DSP 1 to finish its bus cycle 3 When DSP 1 s memory cycle is complete it release...

Page 90: ...memory system when separate test and set instructions are used to lock a data block for use by a single processor The correct procedure is to test the semaphore and then set the semaphore if it was cl...

Page 91: ...in the DSP56000 Family Manual The proper way to set the semaphore to gain exclusive access to a memory block is to use BSET to test the semaphore and to set it to one After the bit is set the result o...

Page 92: ...Freescale Semiconductor I Freescale Semiconductor Inc For More Information On This Product Go to www freescale com nc...

Page 93: ...MOTOROLA 5 1 SECTION 5 PORT B Freescale Semiconductor I Freescale Semiconductor Inc For More Information On This Product Go to www freescale com nc...

Page 94: ...ORT B MOTOROLA 5 1 INTRODUCTION 5 3 5 2 GENERAL PURPOSE I O CONFIGURATION 5 4 5 3 HOST INTERFACE HI 5 10 Freescale Semiconductor I Freescale Semiconductor Inc For More Information On This Product Go t...

Page 95: ...amples of how to configure and use the port EXTERNAL ADDRESS SWITCH EXTERNAL DATA SWITCH BUS CONTROL HOST DMA PARALLEL INTERFACE SCI INTERFACE SSI INTERFACE PORT A I 0 47 PORT C I 0 9 PORT B I 0 15 A0...

Page 96: ...is set to one If a pin is configured as a GPIO input as shown in Figure 5 4 and the processor reads the PBD the processor sees the logic level on the pin If the processor writes to the PBD the data i...

Page 97: ...Note The external host processor should be carefully synchronized to the DSP56002 to assure that the DSP and the external host will properly read status bits transmitted between them There is more di...

Page 98: ...either X or Y memory The bit oriented instructions that use I O short addressing BCHG BCLR BSET BTST JCLR JSCLR JSET and JSSET can also be used to address individual bits for faster I O processing The...

Page 99: ...REGISTER SCCR SCI INTERFACE STATUS REGISTER SSR SCI INTERFACE CONTROL REGISTER SCR SSI RECIEVE TRANSMIT DATA REGISTER RX TX SSI STATUS TIME SLOT REGISTER SSISR TSR SSI CONTROL REGISTER B CRB SSI CONT...

Page 100: ...instruction cycle For example the instruction MOVE DATA15 X PORTB DATA24 Y EXTERN 1 writes 15 bits of data to the Port B register but the output pins do not change until the following instruction cyc...

Page 101: ...r allowing the address space to be extended from 64K words 16 bits to two billion words 16 bits 15 bits 31 bits BC 0 BD 0 BD 1 BD 2 BD 3 BD 4 BD 5 BD 6 BD 7 BD 8 BD 9 BD 10 BD 11 BD 12 BD 13 BD 14 PB...

Page 102: ...is pre sented in the following listing Speed 3 3 Million Word Sec Interrupt Driven Data Transfer Rate This is the maximum interrupt rate for the DSP56002 running at 40 MHz i e one interrupt every six...

Page 103: ...y can also be divided horizontally into control at the top DSP to host data transfer in the middle HTX RXH RXM and RXL and host to DSP data transfer at the bottom THX TXM TXL and HRX 5 3 1 Host Interf...

Page 104: ...processor programming model is shown in Figure 5 12 RECEIVE BYTE REGISTERS READ ONLY TRANSMIT BYTE REGISTERS WRITE ONLY INTERRUPT CONTROL REGISTER READ WRITE DSP CPU GLOBAL DATA BUS 0 ICR 1 CVR HCR H...

Page 105: ...1 HOST FLAG 0 HOST RECEIVE DATA FULL HOST TRANSMIT DATA EMPTY HOST COMMAND PENDING HOST STATUS REGISTER HSR READ ONLY DMA 0 X FFEB X FFEB RECEIVE HIGH BYTE RECEIVE MIDDLE BYTE RECEIVE LOW BYTE TRANSMI...

Page 106: ...is set When HRIE is cleared HRDF interrupts are disabled When HRIE is set a host receive data interrupt request will occur if HRDF is also set Hardware and software resets clear HRIE 5 3 2 1 2 HCR Ho...

Page 107: ...st Status Register HSR The HSR is an 8 bit read only status register used by the DSP to interrogate status and flags of the HI It can not be directly accessed by the host processor When the HSR is rea...

Page 108: ...soft ware individual and STOP resets clear HF0 5 3 2 2 5 HSR Host Flag 1 HF1 Bit 4 The HF1 bit in the HSR indicates the state of host flag 1 in the ICR on the host processor side HF1 can only be chang...

Page 109: ...reg ister contains valid data when the HRDF bit is set Reading HRX clears HRDF The DSP may program the HRIE bit to cause a host receive data interrupt when HRDF is set Resets do not affect HRX 5 3 2 4...

Page 110: ...nterrupt service routine must read or write the appropriate HI register clearing HRDF or HTDE for example to clear the interrupt In the case of host command interrupts the interrupt acknowledge from t...

Page 111: ...erations Host Side for additional information 5 3 3 Host Interface Host Processor Viewpoint The HI appears to the host processor as eight words of byte wide static memory The host may access the HI as...

Page 112: ...the DSP interrupt response is sufficiently fast most host micro processors can load or store data at their maximum programmed I O non DMA instruction rate without testing the handshake flags for each...

Page 113: ...s are reset values HM1 0 HM0 0 INIT 0 MODES 0 0 Interrupt Mode DMA Off 0 1 24 Bit DMA Mode 1 0 16 Bit DMA Mode 1 1 8 Bit DMA Mode 0 HOST VECTOR 12 7 5 0 COMMAND VECTOR REGISTER CVR READ WRITE HC 0 1 H...

Page 114: ...uest Enable TREQ Bit 1 The TREQ bit is used to control the HREQ pin for host transmit data transfers In interrupt mode DMA off TREQ is used to enable interrupt requests via the external HREQ pin when...

Page 115: ...cessor and cannot be changed by the DSP Hardware software individual and STOP resets clear HF1 5 3 3 2 6 ICR Host Mode Control HM1 and HM0 bits Bits 5 and 6 The HM0 and HM1 bits select the transfer mo...

Page 116: ...er on the host data bus the address counter is incremented to the next register When the address counter reaches the highest register RXL or TXL the address counter is not incremented but is loaded wi...

Page 117: ...OST INTERFACE HI MOTOROLA PORT B 5 25 transferring only part of the first data word Freescale Semiconductor I Freescale Semiconductor Inc For More Information On This Product Go to www freescale com n...

Page 118: ...ways loads the DMA address counter and clears the channel according to TREQ and RREQ INIT execution is not affected by HM1 and HM0 The internal DMA counter is incremented with each DMA transfer each H...

Page 119: ...gure 5 14 5 3 3 3 1 CVR Host Vector HV Bits 0 5 The six HV bits select the host command exception address to be used by the host com mand exception logic When the host command exception is recognized...

Page 120: ...e HC and HV in the same write cycle if desired Hardware software individual and STOP resets clear HC 5 3 3 4 Interrupt Status Register ISR The ISR is an 8 bit read only status register used by the hos...

Page 121: ...ates thatboth the TXH TXM TXL and the HRX registers are empty TRDY TXDE HRDF When TRDY is set to one the data that the host processor writes to TXH TXM and TXL will be immediately transferred to the D...

Page 122: ...indicated by the ISR RXDF and TXDE status bits respectively If the interrupt source has been enabled by the associated request enable bit in the ICR HREQ will be set if one or more of the two enabled...

Page 123: ...y order to transfer 8 16 or 24 bit data However writing TXL clears the TXDE bit Because writing the TXL register clears the TXDE status bit TXL is normally the last register written during a 16 or 24...

Page 124: ...pins are configured as GPIO input pins during hardware reset Register Name Register Data Reset Type HW Reset SW Reset IR Reset ST Reset ICR INIT 0 0 0 0 HM 1 0 0 0 0 0 TREQ 0 0 0 0 RREQ 0 0 0 0 HF 1 0...

Page 125: ...en the host interface is not being used and is config ured as a GPIO input pin during hardware reset 5 3 4 5 Host Request HREQ This open drain output signal is used by the DSP56002 HI to request servi...

Page 126: ...Figure 5 16 In this case all other HI control pins are ignored and the state of the HI is not affected Note HACK should always be pulled high when it is not in use 5 3 5 Servicing the Host Interface...

Page 127: ...6002 Technical Data Sheet 5 3 5 2 HI Interrupts Host Request HREQ The host processor interrupts are external and use the HREQ pin HREQ is normally con nected to the host processor maskable interrupt I...

Page 128: ...TRDY 1 signifying the transmit data register is empty and that the receive data register on the DSP CPU side is also empty so that the data written by the host processor will be transferred directly t...

Page 129: ...quest is cleared or masked In the case where the host processor is a member of the MC680XX Family servicing the interrupt will start by asserting HREQ to interrupt the processor see Figure 5 17 The ho...

Page 130: ...6 HI Application Examples 5 3 6 HI Application Examples The following paragraphs describe examples of initializing the HI transferring data with the HI bootstrapping via the HI and performing DMA tra...

Page 131: ...m programmed I O non DMA instruction rate without testing the handshake flags for each transfer If the full handshake is not needed the host processor can treat the DSP as fast memory and data can be...

Page 132: ...BLE HOST COMMAND PENDING INTERRUPT ENABLE INTERRUPT BIT 2 1 DISABLE INTERRUPT BIT 2 0 4 SET CLEAR HOST FLAG 2 OPTIONAL ENABLE FLAG BIT 3 1 DISABLE FLAG BIT 3 0 5 SET CLEAR HOST FLAG 3 OPTIONAL ENABLE...

Page 133: ...from the host processor to the DSP are STEP 2 OF HOST PORT CONFIGURATION 1 CLEAR HOST COMMAND BIT HC BIT 7 0 1 7 6 5 0 HC HV 2 OPTION 1 SELECT HOST VECTOR HV OPTIONAL SINCE HV CAN BE SET ANY TIME BEFO...

Page 134: ...6 From the DSP s viewpoint the HRDF bit when set in the HSR indicates that data is waiting in the HI for the DSP INIT HM1 HM0 HF1 HF0 TREQ RREQ 0 Reserved write as zero 7 6 5 4 3 2 1 0 INITIALIZE DSP...

Page 135: ...ares the DSP CPU to look for the host flag HF0 1 The JCLR instruction is a polling loop that looks for HF0 1 which indicates that the host processor is ready When the host processor is ready to transf...

Page 136: ...addition the HC can cause any of the other 19 interrupt routines in the DSP to be executed The process to execute a HC see Figure 5 28 is as follows TREQ RREQ INIT Execution 0 0 INIT 0 Address Counter...

Page 137: ...STATUS REGISTER HSR READ ONLY HRDF HOST RECEIVE DATA FULL 1 THE HOST RECEIVE REGISTER HRX CONTAINS DATA FROM THE HOST PROCESSOR 0 HRX IS EMPTY DMA INDICATES THE HOST PROCESSOR HAS ENABLED THE DMA MOD...

Page 138: ...RANSMIT BYTE REGISTERS WRITE TO TXL CLEARS TXDE IN ISR 6 IF DSP560022 HAS OLD DATA IN HRX THEN HRDF 1 TXH TXM TXL 7 0 5 6 LAST WRITE 7 TRANSMIT BYTE REGISTERS TBR 7 WHEN DSP56002 READS HRX THEN HRDF 0...

Page 139: ...IDLE LINE 001C SCI TIMER 001E RESERVED 0020 HOST RECEIVE DATA 0022 HOST TRANSMIT DATA 0024 HOST COMMAND DEFAULT 0026 AVAILABLE FOR HOST COMMAND 0028 AVAILABLE FOR HOST COMMAND 003C AVAILABLE FOR HOST...

Page 140: ...ND IS MASKED UNTIL HCIE 1 5 WHEN THE HOST COMMAND EXCEPTION IS ACKNOWLEDGED THE HC BIT IS CLEARED BY THE HOST COMMAND LOGIC HC CAN BE READ AS A STATUS BIT HCP HOST COMMAND PENDING EXCEPTION VECTOR TAB...

Page 141: ...is accepted Although the HV can be programmed to any exception vector it is not recommended that HV 0 RESET be used because it does not reset the DSP hardware DMA must be disabled to use the host exc...

Page 142: ...is so fast host handshaking is generally not required Figure 5 29 Bootstrap Using the HI DSP56002 HR W HEN H0 H7 F32 F32 F32 F32 LS09 ADDRESS DECODE 1K 5 V HA0 HA2 LDS AS DTACK A1 A3 D0 D7 R W A4 A23...

Page 143: ...or needs to terminate the bootstrap loading before 512 words have been down loaded it can set the HF0 bit in the ICR The DSP will then terminate the down load and start executing at location P 0000 Si...

Page 144: ...ill be transferred to the receive byte registers RXH RXM RXL This transfer sets RXDF in the ISR 7 which the host processor can poll to see if data is available or if the RREQ bit in the ICR is set the...

Page 145: ...T CONTROL REGISTER HCR READ WRITE HTIE HOST TRANSMIT INTERRUPT ENABLE 1 ENABLE THE DSP INTERRUPT TO P 0022 0 DISABLE THE DSP INTERRUPT TO P 0022 DSP INTERRUPT IS CAUSED BY HTDE 1 INIT HM1 HM0 HF1 HF0...

Page 146: ...HTDE 0 THEN TRANSFER OCCURS RXH RXM RXL 7 0 5 6 LAST READ 7 RECEIVE BYTE REGISTERS RBR HREQ DMA 0 HF3 HF2 TRDY TXDE 1 2 7 0 INTERRUPT ST A TUS REGISTER ISR RXDF RECEIVE DATA FULL INIT HM1 HM0 HF1 HF0...

Page 147: ...g any of the MAIN PROGRAM transmit 24 bit data to host ORG P 40 MOVEP 1 X PBC Turn on Host Port MOVEP 0C00 X IPR Turn on host interrupt MOVEP 0 X HCR Turn off XMT and RCV interrupts MOVE 0 SR Unmask i...

Page 148: ...N and HA0 HA2 to transfer data The host can therefore transfer data in the other direction during the DMA operation using polling techniques 5 V DMA CONTROLLER TRANSFER REQUEST TRANSFER ACKNOWLEDGE DS...

Page 149: ...contents of TXH TXM TXL are transferred to HRX provided HRDF 0 After the transfer to HRX TXDE will be set to one and HREQ will be asserted to start the transfer of another word from external memory t...

Page 150: ...sfer see Figure 5 39 HREQ DMA 0 HF3 HF2 TRDY TXDE RXDF 2 7 0 INTERRUPTST A TUS REGISTER ISR READONL Y 0 0 Interrupt Mode DMA Off 0 1 24 Bit DMA Mode 1 0 16 Bit DMA Mode 1 1 8 Bit DMA Mode INIT HM1 HM0...

Page 151: ...FACE MODE 24 BIT DMA HOST TO DSP USE INIT BIT TO SET TXDE CLEAR HRDF LOAD DMA COUNTER 3 TELL DSP56002 WHERE TO STORE DATA i e PROGRAM ADDRESS REGISTER R7 ENABLE INTERRUPT HRIE CAN BE DONE WITH A HOST...

Page 152: ...y clearing the HM1 and HM0 bits and clearing TREQ The HREQ will be active immediately after initialization is completed depending on hard ware because the data direction is host to DSP and TXH TXM and...

Page 153: ...rd size HM0 and HM1 the direction TREQ 0 RREQ 1 and setting INIT 1 see Figure 5 40 for additional information on these bits 3 Initialize the DSP s source pointer 3 used in the DMA exception handler an...

Page 154: ...AD DMA COUNTER 5 HOST IS FREE TO PERFORM OTHER TASKS i e DSP TO HOST TRANSFER ON A POLLED BASIS 8 TERMINATE DMA CHANNEL 9 TERMINATE DSP DMA MODE BY CLEARING HM1 HM0 AND TREQ 7 DMA CONTROLLER INTERRUPT...

Page 155: ...r multiple bytes If an MC68020 or MC68030 is used dynamic bus siz ing can be used to transfer multiple bytes with any instruction Figure 5 43 is a high level block diagram of a system using a single h...

Page 156: ...REQ HEN HACK HR W HA0 HA2 H0 H7 ADDRESS DECODE INTERRUPT VECTOR DECODE MC68000 USE MOVEP for multiple byte transfers MC68020 or MC68030 Any Memory references will work due to dynamic bus sizing INTERR...

Page 157: ...HOST SSI DSP56002 HOST SSI DSP56002 HOST SSI DSP56002 HOST CODEC CODEC ANALOG OUTPUT ANALOG INPUT ANALOG OUTPUT REQ RD WR ADDRESS BUS DATA BUS SELECT SELECT SELECT RX TX RX TX RX TX RX Figure 5 43 Mu...

Page 158: ...the clock rate used by the DSP but there is a chance that the state of the bit could be changing during the read operation This possible change is generally not a system problem since the bit will be...

Page 159: ...time the HC bit is cleared However the HV can be changed when the HC bit is set 6 When using the HREQ pin for handshaking wait until HREQ is asserted and then start writing reading data using the HEN...

Page 160: ...HOST INTERFACE HI 5 68 PORT B MOTOROLA Freescale Semiconductor I Freescale Semiconductor Inc For More Information On This Product Go to www freescale com nc...

Page 161: ...MOTOROLA 6 1 SECTION 6 PORT C Freescale Semiconductor I Freescale Semiconductor Inc For More Information On This Product Go to www freescale com nc...

Page 162: ...CTION 6 3 6 2 GENERAL PURPOSE I O PORT C 6 4 6 3 SERIAL COMMUNICATION INTERFACE SCI 6 11 6 4 SYNCHRONOUS SERIAL INTERFACE SSI 6 76 Freescale Semiconductor I Freescale Semiconductor Inc For More Inform...

Page 163: ...ecs digital to analog and analog to digital converters and any of several transducers This section describes all three port C functions as well as examples of how to configure and use each function EX...

Page 164: ...y setting the appropriate PCC bit memory location X FFE1 to zero for general purpose I O or to one for serial interface The PCDDR memory location X FFE3 programs each pin corresponding to a bit in the...

Page 165: ...output If the PCD DR is set configured as an output for a given serial interface pin when the processor reads the PCD it sees the contents of the PCD rather than the logic level on the pin another ca...

Page 166: ...data to from a peripheral to memory and execute one other instruction or to move the data to an absolute address MOVEP is the only memory to memory move instruction however one of the operands must b...

Page 167: ...f steps 1 2 and 3 in Figure 6 7 is optional and can be changed as needed 6 2 2 Port C General Purpose I O Timing Parallel data written to Port C is delayed by one instruction cycle For example the fol...

Page 168: ...TA REGISTER SRX STX SCI MID REC XMIT DATA REGISTER SRX STX SCI LOW REC XMIT DATA REGISTER SRX STX SCI TRANSMIT DATA ADDRESS REGISTER STXA SCI CONTROL REGISTER SCCR SCI INTERFACE STATUS REGISTER SSR SC...

Page 169: ...er allowing the address space to be extended from 64K words 16 bits to 33 5 million words CC 1 CD 0 CD 1 CD 2 CD 3 CD 4 CD 5 CD 6 CD 7 CD 8 PC 0 PC 1 PC 2 PC 3 PC 4 PC 5 PC 6 PC 7 PC 8 STEP 1 SELECT E...

Page 170: ...Therefore if wait states are inserted in the DSP CPU timing they also affect Port C timing As a result Port A and Port C in the previous synchronization example will always stay synchronized regardle...

Page 171: ...rupt vector have been in cluded so that the baud rate generator can function as a general purpose timer when it is not being used by the SCI peripheral or when the interrupt timing is the same as that...

Page 172: ...s not being used 6 3 1 3 SCI Serial Clock SCLK This bidirectional pin provides an input or output clock from which the transmit and or re ceive baud rate is derived in the asynchronous mode and from w...

Page 173: ...TDRE TRNE 0 0 0 0 0 0 1 1 SCI ST A TUS REGISTER SSR READ ONL Y RECEIVED BIT 8 FRAMING ERROR FLAG PARITY ERROR FLAG OVERRUN ERROR FLAG TRANSMITTER EMPTY TRANSMITTER DATA REGISTER EMPTY RECEIVE DATA RE...

Page 174: ...X FFF5 X FFF4 SRX SRX SRX SCI RECIEVE DATA REGISTER HIGH READ ONLY SCI RECIEVE DATA REGISTER MID READ ONLY SCI RECEIVE DATA REGISTER LOW READ ONLY RXD SCI RECEIVE DATA SHIFT REGISTER NOTE SRX is the...

Page 175: ...an odd number the parity bit is made equal to one and thus produces an odd number If the receiver counts an even number of ones an error in transmission has occurred When even parity is selected an e...

Page 176: ...YPE STOP BIT EVEN PARITY MODE 5 2 1 0 1 0 1 WDS2 WDS1 WDS0 X FFF0 11 BIT ASYNCHRONOUS 1 START 8 DATA 1 ODD PARITY 1 STOP TX SSFTD 0 D0 D1 D2 D3 D4 D5 D6 START BIT D7 OR DATA TYPE STOP BIT ODD PARITY M...

Page 177: ...ITY MODE 5 2 1 0 1 0 1 WDS2 WDS1 WDS0 X FFF0 11 BIT ASYNCHRONOUS 1 START 8 DATA 1 ODD PARITY 1 STOP TX SSFTD 1 START BIT D7 OR DATA TYPE STOP BIT ODD PARITY MODE 6 2 1 0 1 1 0 WDS2 WDS1 WDS0 X FFF0 11...

Page 178: ...re enabled by an idle string of at least 10 or 11 depending on WDS mode consecutive ones The transmitter s software must provide this idle string between consecutive messages The idle string cannot oc...

Page 179: ...rdware and software reset RWU is a don t care in the synchronous mode 6 3 2 1 6 SCR Wired OR Mode Select WOMS Bit 7 When the WOMS bit is set the SCI TXD driver is programmed to function as an open dra...

Page 180: ...nd message to STX In this sequence if the first byte of the second message is not transferred to the STX prior to the finish of the preamble transmission then the transmit data line will simply mark i...

Page 181: ...ta interrupt from the inter rupt controller TIE is cleared by hardware and software reset 6 3 2 1 12 SCR Timer Interrupt Enable TMIE Bit 13 The TMIE bit is used to enable the SCI timer interrupt If TM...

Page 182: ...the transmitter When TRNE is set data written to one of the three STX locations or to the STXA will be transferred to the transmit shift register and be the first data transmitted TRNE is cleared when...

Page 183: ...ransition of IDLE from zero to one can cause an IDLE interrupt ILIE IDLE is cleared by the hard ware software SCI individual and stop reset 6 3 2 2 5 SSR Overrun Error Flag OR Bit 4 The OR flag is set...

Page 184: ...re software SCI individual and stop reset clear R8 6 3 2 3 SCI Clock Control Register SCCR The SCCR is a 16 bit read write register which controls the selection of the clock modes and baud rates for t...

Page 185: ...he transmitter and receiver are synchronous with each other 6 3 2 3 1 SCCR Clock Divider CD11 CD0 Bits 11 0 The clock divider bits CD11 CD0 are used to preset a 12 bit counter which is decre mented at...

Page 186: ...M selects internal or external clock for the receiver see Figure 6 35 RCM equals zero selects the internal clock RCM equals one selects the external clock from the SCLK pin Hardware and software reset...

Page 187: ...zeroed Mapping SRX as described allows three bytes to be efficiently packed into TCM RCM TX Clock RX Clock SCLK Pin Mode 0 0 Internal Internal Output Synchronous Asynchronous 0 1 Internal External Inp...

Page 188: ...at order for SSFTD equals zero see Figure 6 10 a For SSFTD equals one the data bits are transmitted MSB first see Figure 6 10 b The clock source is de fined by the receive clock mode RCM select bit in...

Page 189: ...er there will be a two to four serial clock cycle delay between when the data is transferred from either STX or STXA to the transmit shift register and when the first bit appears on the TXD pin A seri...

Page 190: ...ength and format of the serial word is defined by the WDS0 WDS1 and WDS2 control bits in the SCR In the asynchronous modes the start bit the eight data bits with the LSB first if SSFTD 0 and the MSB f...

Page 191: ...or software reset 2 Program SCI control registers 3 Configure SCI pins at least one as not general purpose I O Figure 6 14 and Figure 6 15 show how to configure the bits in the SCI registers Figure 6...

Page 192: ...0 COD 12 0 0 CD 11 0 11 0 0 0 SRX SRX 23 0 23 16 15 8 7 0 STX STX 23 0 23 0 SRSH SRS 8 0 8 0 STSH STS 8 0 8 0 NOTES SRSH SCI receive shift register STSH SCI transmit shift register HW Hardware reset...

Page 193: ...al clock to the SCI For example a 2 048 MHz bit rate requires a CPU clock of 32 768 MHz An application may need a 40 MHz CPU clock and an external clock for the SCI 1 PERFORM HARDWARE OR SOFTWARE RESE...

Page 194: ...BIT MULTIDROP 1 START 8 DATA EVEN PARITY 1 STOP 111 RESERVED STEP 2a SELECT SCI OPERATION FOR A BASIC CONFIGURATION SET SCKP BIT 15 0 STIR BIT 14 0 TMIE BIT 13 0 ILIE BIT 10 0 RWU BIT 6 0 WAKE BIT 5 0...

Page 195: ...CLOCK PRESCALER BIT SCP BIT 13 ACCORDING TO TABLES 11 2 OR 11 3 SET TRANSMIT CLOCK SOURCE EXTERNAL CLOCK 1 INTERNAL CLOCK 0 SET RECEIVE CLOCK SOURCE EXTERNAL CLOCK 1 INTERNAL CLOCK 0 SET SCI CLOCK PRE...

Page 196: ...a Asynchronous SCI Bit Rates for a 40 MHz Crystal Bit Rate BPS SCP Bit Divider Bits CD0 CD11 Crystal Frequency 9600 0 040 39 936 000 4800 0 081 39 936 000 2400 0 103 39 936 000 1200 0 207 39 936 000...

Page 197: ...096M 0 000 0 128K 0 01F 0 64K 0 03F 0 56K 0 048 0 195 32K 0 07F 0 16K 0 0FF 0 8000 0 1FF 0 4000 0 3FF 0 2000 0 7FF 0 1000 0 FFF 0 Table 6 4 a Synchronous SCI Bit Rates for a 32 768 MHz Crystal BPS f0...

Page 198: ...NSMIT DATA 001A SCI IDLE LINE 001C SCI TIMER 001E RESERVED 0020 HOST RECEIVE DATA 0022 HOST TRANSMIT DATA 0024 HOST COMMAND DEFAULT 0026 AVAILABLE FOR HOST COMMAND 0028 AVAILABLE FOR HOST COMMAND 003A...

Page 199: ...mode 0 buses as both a controller master or a peripheral slave and is compatible with the SSI mode if SCKP equals one In synchronous mode the clock is always common to the transmit and receive shift r...

Page 200: ...CI CLOCK CONTROL REGISTER SCCR READ WRITE 0 TCM RCM CLOCK OUTPUT SCP 0 B0 B1 B2 B3 B4 B5 B6 B7 TRANSMIT DATA SSFTD 0 XXXXXX XX XX XX XX XX XX XX XXXXXXX RECEIVE DATA WRITE STX 0 1 2 3 4 5 6 7 SAMPLE E...

Page 201: ...ons two devices transmitting simultaneously must be avoid ed with this circuit by using a protocol such as alternating transmit and receive periods In the example the 8051 is the master device because...

Page 202: ...CD2 CD1 CD0 SCI CLOCK CONTROL REGISTER SCCR READ WRITE 1 TCM RCM CLOCK INPUT SKP 0 B0 B1 B2 B3 B4 B5 B6 B7 TRANSMIT DATA SSFTD 0 XXXXXX XX XX XX XX XX XX XX XXXXXXX RECEIVE DATA WRITE STX 0 1 2 3 4 5...

Page 203: ...ND 2 TRDE TDRE 0 BY STX WRITE TXD TRANS MIT DATA BIT 0 BIT 1 BIT 2 BIT 3 BIT 4 BIT 5 BIT 6 BIT 7 BIT 0 BIT 1 BIT 2 SECOND WORD SERIAL CLOCK EXT STX WRITE RANGE FIRST WORD NOTE In external clock mode i...

Page 204: ...embedded word sync which allows an un synchronized data clock to be synchronized with the word if the clock rate and number of bits per word is known Thus the clock can be generated by the receiver r...

Page 205: ...it is enabled by 6 setting the RXD bit in the PCC The receiver is continually sampling RDX at the 16 clock rate to find the idle start bit transition edge When that edge is detected 1 the following ei...

Page 206: ...TURN ON RECEIVER RE 1 4 OPTIONALLY ENABLE RECEIVER INTERRUPTS RIE 1 RIE RE 5 SET THE BAUD RATE BY PROGRAMMING THE SCCR CCx Function 0 GPIO 1 Serial Interface PRESCALER IF SCP 1 THEN DIVIDE BY 8 IF SCP...

Page 207: ...TATUS REGISTER SSR READ ONLY 3 IF RIE 1 IN SCR THEN AN INTERRUPT IS GENERATED SCI RECEIVE DATA RECEIVE INTERRUPT SERVICE ROUTINE P 0014 INTERRUPT VECTOR TABLE 4 THE RECEIVE INTERRUPT SERVICE ROUTINE R...

Page 208: ...enabled by 6 setting the TXD bit in the PCC Transmis sion begins with 7 a preamble of ones If polling is used to transmit data see Figure 6 26 the polling routine can look at either TDRE or TRNE to de...

Page 209: ...R PE OR FE IN SSR 7 6 5 4 3 2 1 0 RDRF X FFF1 SCI STATUS REGISTER SSR READ ONLY SCI RECEIVE DATA RECEIVE WITH EXCEPTION INTERRUPT SERVICE ROUTINE P 0016 INTERRUPT VECTOR TABLE 5 READ SSR SERIAL STRING...

Page 210: ...SMITTER SYSTEM CCx Function 0 GPIO 1 Serial Interface 7 THE TRANSMITTER WILL FIRST BROADCAST A PREAMBLE OF ONES BEFORE BEGINNING DATA TRANSMISSION 10 ONES WILL BE TRANSMITTED FOR THE 10 BIT ASYNCHRONO...

Page 211: ...F TIE 1 IN SCR AND TDRE 1 IN SSR THEN AN INTERRUPT IS GENERATED TDRE 6 THE CHARACTER IN STX IS COPIED INTO TRANSMIT DATA SHIFT REGISTER TRNE IS CLEARED TDRE IS SET GO TO STEP 2 TRNE 23 16 15 8 7 0 X F...

Page 212: ...TMIE TIE RIE ILIE TE RE WOMS RWU WAKE SBK SSFTD WDS2 WDS1 WDS0 SCI INTERFACE CONTROL REGISTER SCR READ WRITE STIR TOGGLE 1 0 1 TO SEND A CHARACTER TIME OF ALL ONES MARKS TOGGLE 0 1 0 TO SEND A CHARAC...

Page 213: ...s dis abled until another byte is ready for transmission The SCI is initialized by setting the in terrupt level which configures the SCR and SCCR and then is enabled by writing the PCC The main progra...

Page 214: ...TIALIZE THE SCI PORT AND RX TX BUFFER POINTERS ORG P START Start the program at location 40 ORI 03 MR Mask interrupts temporarily MOVEP C000 X IPR Set interrupt priority to 2 MOVEP 0B02 X SCR Disable...

Page 215: ...The particular message format and protocol used are determined by the user s software These message formats include point to point bus token ring and custom configura tions The SCI multidrop network...

Page 216: ...S 2 RXD MC68HC11 ADDRESS 3 RXD OTHER SERIAL DEVICE ADDRESS N TXD DSP56002 DEVICE RECEIVING MESSAGE RECEIVER INTERRUPT DOES HEADER EQUAL MY ADDRESS NO RECEIVE REST OF MESSAGE DO NOT MASK INTERRUPTS YES...

Page 217: ...P from reading messages intended for other processors The usual operational procedure is for each DSP to suspend SCI reception the DSP can con tinue processing until the beginning of a message Each DS...

Page 218: ...A REGISTER LOW WRITE ONLY X FFF3 23 16 15 8 7 0 X FFF6 X FFF5 X FFF4 STX STX STX TXD TXD STXA SCI TRANSMIT DATA SHIFT REGISTER 23 16 15 8 7 0 A 41 01000001 DATA ADDRESS SCI TRANSMIT DATA SHIFT REGISTE...

Page 219: ...PORT ADDRESS 3 XMIT REC DSP56002 SCI PORT ADDRESS N 1 XMIT REC DSP56002 SCI PORT ADDRESS N XMIT REC A2 MESSAGE A A3 MESSAGE C A1 MESSAGE B ADDRESS CHARACTER WAKEUP AND OR INTERRUPT IDLE IDLE LINE WAK...

Page 220: ...001A INTERRUPT VECTOR TABLE A1 MESSAGE A A2 MESSAGE B LINE IS IDLE FOR 10 OR 11 STOP BITS 1 RWU IS CLEARED THE RECEIVER IS ENABLED 2 IDLE IS SET IN SSR INDICATING THE LINE IS IDLE 3 AN INTERNAL FLAG...

Page 221: ...wakeup and RWU must be set to put the SCI to sleep and enable the wakeup function RIE should be set if interrupts are to be used to receive data 1 When an address character ninth bit 1 is received the...

Page 222: ...R READ ONLY SCI RECEIVE DATA P 0014 INTERRUPT VECTOR TABLE A1 MESSAGE A A2 MESSAGE B 1 WHEN ADDRESS CHARACTER IS RECEIVED THEN R8 1 IN SSR AND RWU IS CLEARED THE RECEIVER WAKES UP 2 IF RIE 1 IN SCR TH...

Page 223: ...address or data If it is an ad dress it compares the address with its own If the addresses do not match the SCI is put back to sleep If the addresses match the SCI is left awake and control is returne...

Page 224: ...rface control register SCCR EQU FFF2 SCI clock control register STXA EQU FFF3 SCI transmit address register SRX EQU FFF4 SCI receive register STX EQU FFF4 SCI transmit register BCR EQU FFFE Bus contro...

Page 225: ...mode Rec wakeup mode 11 bit multidrop 1 start 8 data 1 data type 1 stop MOVEP 0000 X SCCR Use internal TX RX clocks 625K BPS at 40 MHz MOVEP 03 X PCC Select pins TXD and RXD for SCI INITIALIZE INTERRU...

Page 226: ...to see if the TX buffer is full MOVE R1 fix tail pointer now that we ve used it MOVE R0 B by comparing the head and tail pointers CMP A B of the circular transmit buffer JEQ SND_BUF if equal transmit...

Page 227: ...SUBROUTINE TO WRITE BUFFER TO SCI USING A LONG INTERRUPT TX MOVEP X R0 X STX Transmit a byte and increment the pointer MOVE R0 A Check to see if the TX buffer is empty MOVE R1 B CMP A B JNE END_TX If...

Page 228: ...ogrammed as GPIO pins the transmit interrupts should be turned off TIE 0 Under individual reset TDRE will remain set and the timer will continuously generate interrupts Figure 6 35 shows that an exter...

Page 229: ...BY 16 TRANSMIT CONTROL IF ASYNC THEN DIVIDE BY 16 IF SYNC THEN MASTER DIVIDE BY 2 SLAVE DIVIDE BY 1 RECEIVE CONTROL IF ASYNC THEN DIVIDE BY 16 IF SYNC THEN MASTER DIVIDE BY 2 SLAVE DIVIDE BY 1 PERIOD...

Page 230: ...nt the timer interrupt counter NOP This timer routine is implemented as a fast interrupt INITIALIZE THE SCI PORT ORG P START Start the program at location 40 MOVE 0 R0 Initialize the timer interrupt c...

Page 231: ...e program will begin loading in program memory and 4 loads the program First the SCI Control Register is set to 0302 see Figure 5 2 which enables the trans mitter and receiver and configures the SCI f...

Page 232: ...es 1 These diodes must be Schottky diodes 2 All resistors are 15K unless noted otherwise 3 When in RESET IRQA IRQB and NMI must be deasserted by external peripherals SCLK RXD TXD 16xCLK Serial Bootstr...

Page 233: ...he starting address JCLR 2 X SSR Wait for RDRF to go high MOVEP X SRXL A2 Put 8 bits in A2 JCLR 1 X SSR Wait for TDRE to go high MOVEP A2 X STXL echo the received byte REP 8 ASR A _LOOP6 MOVE A1 R0 st...

Page 234: ...ng a single transmit receive line multidrop word format and wired OR The use of wired OR requires a pullup resistor as shown A protocol must be used to prevent collisions This scheme is physically the...

Page 235: ...Multimaster System Example MC68HC11 MASTER RXD TXD PC2 MASTER RECEIVE MASTER TRANSMIT DSP56002 SLAVE RXD TXD PC2 DSP56002 SLAVE RXD TXD PC2 DSP56002 SLAVE RXD TXD PC2 Figure 6 40 Master Slave System E...

Page 236: ...s of I O per frame in the network mode This mode is typically used in star or ring time division multiplex networks with other DSP56K processors and or codecs The clock can be programmed to be continu...

Page 237: ...Six Pins STD SSI Transmit Data SRD SSI Receive Data SCK SSI Serial Clock SC0 Serial Control 0 defined by SSI mode SC1 Serial Control 1 defined by SSI mode SC2 Serial Control 2 defined by SSI mode On...

Page 238: ...of SC0 SC1 SC2 and SCK in the various configurations The following paragraphs describe the uses of these pins for each of the SSI operating modes Figure 6 42 and Figure 6 43 show the internal clock p...

Page 239: ...ernal Not Used FS External Not Used SC2 1 out SCD2 FST Internal FST Internal FS Internal FS Internal SCK 0 in TXC External TXC External XC External XC External SCK 1 out SCKD TXC Internal TXC Internal...

Page 240: ...can be independent of and asynchronous to the DSP system clock it must exceed the minimum clock cycle time of 8T i e the sys tem clock frequency must be at least four times the external SSI clock freq...

Page 241: ...VE CONTROL LOGIC TRANSMIT CONTROL LOGIC FSL0 FSL1 FSL0 FSL1 SYNC TYPE SYNC TYPE SYN 0 SYN 1 INTERNAL RX FRAME CLOCK SCD1 1 SYN 1 SCD1 0 SYN 0 SCD1 SC1 SCD2 SC2 INTERNAL TX FRAME CLOCK FLAG1 IN SYNC MO...

Page 242: ...is the receiver frame sync I O For synchronous mode with continuous clock this pin is serial flag SC1 and operates like the previously described SC0 SC0 and SC1 are independent serial I O flags but m...

Page 243: ...egisters are illustrated in Figure 6 44 and Figure 6 45 The following paragraphs give detailed descriptions and op erations of each of the bits in the SSI registers The SSI registers are not prefaced...

Page 244: ...CEIVE DATA REGISTER FULL TRANSMIT DATA REGISTER EMPTY RECEIVER OVERRUN ERROR FLAG INPUT FLAGS TRANSMIT FRAME SYNC RECEIVE FRAME SYNC TRANSMITTER UNDERRUN ERROR FLAG TIE 0 OUTPUT FLAGS SERIAL CONTROL D...

Page 245: ...12 BIT 8 BIT a Receive Registers for SHFD 0 STD X FFEF 23 16 15 8 7 0 7 0 7 0 7 0 TRANSMIT HIGH BYTE TRANSMIT MIDDLE BYTE TRANSMIT LOW BYTE SERIAL TRANSMIT DATA TX REGISTER WRITE ONLY SERIAL RECEIVE S...

Page 246: ...e Registers for SHFD 1 STD X FFEF 23 16 15 8 7 0 7 0 7 0 7 0 TRANSMIT HIGH BYTE TRANSMIT MIDDLE BYTE TRANSMIT LOW BYTE SERIAL TRANSMIT DATA TX REGISTER READ ONLY SERIAL TRANSMIT SHIFT REGISTER 23 16 1...

Page 247: ...536 MHz to be generated Hardware and software reset clear PM0 PM7 6 4 2 1 2 CRA Frame Rate Divider Control DC4 DC0 Bits 8 12 The DC4 DC0 bits control the divide ratio for the programmable frame rate d...

Page 248: ...B controls the SSI multifunction pins SC2 SC1 and SC0 which can be used as clock inputs or outputs frame synchronization pins or serial I O flag pins The serial output flag control bits and the direct...

Page 249: ...D0 6 4 2 2 4 CRB Serial Control 1 Direction SCD1 Bit 3 SCD1 controls the direction of the SC1 I O line When SCD1 is cleared SC1 is an input when SCD1 is set SC1 is an output see Tables Table 6 5 and T...

Page 250: ...SC0 SC1 SC2 SCK SRD STD SCD0 SCD1 SCD2 SCKD DIRECTION CONTROLLED BY RECEIVE CLOCK FLAG 0 RECEIVE FRAME SYNC FLAG 1 TRANSMIT FRAME SYNC TX AND RX FRAME SYNC TRANSMIT CLOCK TX AND RX CLOCK SSI RECEIVE...

Page 251: ...hether the receive and transmit functions of the SSI occur synchronously or asynchronously with respect to each other When SYN is cleared asynchronous mode is chosen and separate clock and frame sync...

Page 252: ...is to clear TE and TIE after TDE equals one In the network mode the operation of clearing TE and setting it again will disable the transmitter after completing transmission of the current data word un...

Page 253: ...E 0 See SECTION 7 PROCESSING STATES in the DSP56000 Family Manual for more in formation on exceptions 6 4 2 2 15 CRB SSI Receive Interrupt Enable RIE Bit 15 When RIE is set the DSP will be interrupted...

Page 254: ...data when the receiver shift reg ister is transferred into the receive data register The IF1 bit is enabled only when SCD1 is cleared and SYN is set indicating that SC1 is an input and the synchronous...

Page 255: ...the serial receive data register This indicates that the data word is from the first time slot in the frame If word wide receive frame sync is selected FSL1 0 this indicates that the frame sync was hi...

Page 256: ...transmit data with exception status interrupt will be generated if a transmit interrupt occurs with TUE clear the transmit data without errors interrupt will be generated Hardware software SSI individ...

Page 257: ...e data pin Data is shifted in by the selected internal external bit clock when the associated frame sync I O or gated clock is asserted Data is assumed to be received MSB first if SHFD equals zero and...

Page 258: ...16 15 12 11 8 7 0 RX 24 BITS SHFD 0 RECEIVE SHIFT REGISTER a SHFD 0 SRD GDB 23 16 15 12 11 8 7 0 RX SHFD 1 RECEIVE SHIFT REGISTER b SHFD 1 Figure 6 47 Receive Data Path Freescale Semiconductor I Free...

Page 259: ...0 TX TRANSMIT SHIFT REGISTER 23 16 15 8 7 0 12 11 16 BIT 12 BIT 8 BIT STD GDB TX 24 BITS SHFD 1 TRANSMIT SHIFT REGISTER a SHFD 0 b SHFD 1 Figure 6 48 Transmit Data Path Freescale Semiconductor I Free...

Page 260: ...initions Table 6 12 and Table 6 13 completely describe the SSI operational modes and pin definitions Table 6 5 is a simplified version of these tables The operational modes are as follows 1 Continuous...

Page 261: ...1 0 0 1 0 X X 1 2 4 RXC RXC FSR FST TXC TXC 1 0 0 0 0 X X X 4 4 RXC RXC FSR FST TXC TXC 1 0 1 0 X X X X 4 4 F0 F0 F1 F1 FS XC XC 1 0 0 1 1 X X 0 8 2 RXC RXC FSR FST TXC TXC 1 0 1 1 X X X 0 8 9 F0 F0 F...

Page 262: ...XC 1 1 0 X X 0 1 0 8 5 RXC FST TXC 1 1 1 X X X 1 0 8 9 F0 F0 F1 F1 FS XC 0 1 0 X X 0 1 X 6 5 RXC FST TXC Table 6 13 Mode and Pin Definition Table Gated Clock DC4 DC0 0 means that bits DC4 0 DC3 0 DC2...

Page 263: ...0 TFS 2 0 0 0 0 IF 1 0 0 1 0 0 0 0 RDR RDR 23 0 23 0 TDR TDR 23 0 23 0 RSR RDR 23 0 23 0 TSR RDR 23 0 23 0 Table 6 14 SSI Registers After Reset NOTES 1 RSR SSI receive shift register 2 TSR SSI transm...

Page 264: ...CRB are not affected This procedure allows the DSP program to reset each interface separately from the other internal peripherals The DSP program must use an SSI reset when changing the MOD GCK SYN SC...

Page 265: ...D GCK SYN FSL1 FSL0 SHFD OF1 OF0 PRESCALER IF PSR 1 THEN DIVIDE BY 8 IF PSR 0 THEN DIVIDE BY 1 DIVIDE BY 2 SSI BIT RATE CLOCK DC4 DC0 Word Transfer Rate See Note 1 Words Frame See Note 2 0 0 0 0 0 Con...

Page 266: ...AME LENGTH 1 RX AND TX DIFFERENT LENGTH SHIFT DIRECTION 0 MSB FIRST 1 LSB FIRST CLOCK SOURCE DIRECTION 0 INPUT EXTERNAL 1 OUTPUT INTERNAL SERIAL CONTROL DIRECTION BITS 0 INPUT 1 OUTPUT TRANSMIT ENABLE...

Page 267: ...bits should be set according to the application requirements Table 6 15 a and Table 6 15 b provide a convenient listing of PSR and PM0 PM7 set tings for the common data communication rates and the hi...

Page 268: ...4M 0 00 Table 6 15 b SSI Bit Rates for a 39 936 MHz Crystal BPS fosc 4 7 PSR 1 PM 1 where fosc 40 MHz PSR 0 or 1 PM 0 to FFF BPS fosc 4 7 PSR 1 PM 1 where fosc 39 936 MHz PSR 0 or 1 PM 0 to FFF Bit Ra...

Page 269: ...error has occurred ROE is cleared by first reading the SSISR and then reading RX 3 SSI Transmit Data occurs when the transmit interrupt is enabled the trans mit data register is empty and no transmit...

Page 270: ...STATUS 0018 SCI TRANSMIT DATA 001A SCI IDLE LINE 001C SCI TIMER 001E RESERVED 0020 HOST RECEIVE DATA 0022 HOST TRANSMIT DATA 0024 HOST COMMAND DEFAULT 0026 AVAILABLE FOR HOST COMMAND 0028 AVAILABLE F...

Page 271: ...NG INTERRUPT IS CLEARED BY READING RX TRANSMIT INTERRUPT SERVICE ROUTINE 1 INTERRUPT IS GENERATED WHEN TIE 1 TDF 1 AND TUE 0 2 PENDING INTERRUPT IS CLEARED BY WRITING TO TX OR TSR TRANSMIT WITH EXCEPT...

Page 272: ...lave device always uses an external clock 6 4 7 1 Data Operation Formats The data operation formats available to the SSI are selected by setting or clearing control bits in the CRB These control bits...

Page 273: ...he active clock transitions Although the word length frame sync is shown in Figure 6 58 a bit length frame sync can be used see Figure 6 59 In gated clock systems frame syn chronization is inherent in...

Page 274: ...AND FLAGS SET RECEIVER INTERRUPT AND FLAGS SET NOTE Interrupts occur and data is transferred once per frame sync NETWORK MOD 1 SERIAL CLOCK FRAME SYNC TRANSMITTER INTERRUPTS AND FLAGS SET RECEIVER INT...

Page 275: ...ode External Frame Sync 8 Bit 1 Word in Frame SLOT 0 SLOT 1 SLOT 1 SLOT 0 FRAME SYNC FSL0 0 FSL1 0 FRAME SYNC FSL0 0 FSL1 1 FLAGS DATA Figure 6 57 Network Mode External Frame Sync 8 Bit 2 Words in Fra...

Page 276: ...ME SYNC SERIAL DATA DATA DATA NOTE Frame sync is required to tell when data is present SERIAL CLOCK SERIAL DATA NOTES 1 Word synchronization is inherent in the serial clock signal 2 Frame Sync generat...

Page 277: ...3 Data and flags transition after external frame sync but not before the rising edge of the clock 0 DATA OUT FOR DC 0 OR NETWORK MODES DATA OUT FOR DC 0 DATA IN LATCHED INPUT FLAGS LATCHED DC 0 DC 0 D...

Page 278: ...DC 0 DATA IN LATCHED INPUT FLAGS LATCHED DC 0 FRAME SYNC OUT FSL0 0 FSL1 1 OUTPUT FLAGS DC 0 DATA OUT DC 0 FRAME SYNC OUT FSL0 0 FSL1 0 OUTPUT FLAGS DC 0 7 6 0 Figure 6 60 Internally Generated Clock T...

Page 279: ...OUT DC 0 7 6 0 t dhgc 5 ns INPUT FLAGS LATCHED NOTES 1 Output enabled on rising edge of first clock input 2 Output disabled on falling edge of last clock pulse 3 t dhgc is guaranteed by circuit desig...

Page 280: ...ration both use the SCK pin SC0 and SC1 are designated as flags or can be used as general purpose parallel I O SC2 is not defined if it is an input SC2 is the transmit and receive frame sync if it is...

Page 281: ...ME SYNC INTERNAL FRAME SYNC SC0 SCK EXTERNAL TRANSMIT CLOCK EXTERNAL RECEIVE CLOCK INTERNAL CLOCK SSI BIT CLOCK NOTE Transmitter and receiver may have different clocks and frame syncs SYNCHRONOUS SYN...

Page 282: ...onous Operation Figure 6 65 Gated Clock Asynchronous Operation STD SRD SCK TXC and RXC FLAG 0 FLAG 1 FSr and FSt SSI PC8 PC7 PC6 PC3 PC4 PC5 SC0 SC1 SC2 Figure 6 66 Continuous Clock Synchronous Operat...

Page 283: ...nsmit ter can have either a bit long or word long frame sync signal format and the receiver can have the same or opposite format The selection is made by programming FSL0 and FSL1 in the CRB as shown...

Page 284: ...receding the data DATA DATA SERIAL CLOCK TX FRAME SYNC MIXED FRAME LENGTH FSL1 0 FSL0 1 TX SERIAL DATA RX FRAME SYNC DATA DATA RX SERIAL DATA DATA DATA SERIAL CLOCK TX FRAME SYNC MIXED FRAME LENGTH FS...

Page 285: ...LOCK CONTROL 0 CONTINUOUS CLOCK SYN SYNC ASYNC CONTROL 1 SYNCHRONOUS SCD2 SERIAL CONTROL 2 DIRECTION 1 OUTPUT SCKD CLOCK SOURCE DIRECTION 1 OUTPUT FSL0 FRAME SYNC LENGTH 0 SAME LENGTHS FSL1 FRAME SYNC...

Page 286: ...SELECT 0 NORMAL GCK GATED CLOCK CONTROL 0 CONTINUOUS SYN SYNC ASYNC CONTROL 1 SYNCHRONOUS SCD2 SERIAL CONTROL 2 DIRECTION 1 OUTPUT SCKD CLOCK SOURCE DIRECTION 1 OUTPUT FSL0 FRAME SYNC LENGTH 0 DIFFER...

Page 287: ...ve shift register LSB first and shifted out of the transmit shift register LSB first 6 4 7 2 Normal Mode Examples The normal SSI operating mode characteristically has one time slot per serial frame an...

Page 288: ...SHIFT REGISTER RX 23 16 15 8 7 0 7 0 7 0 7 0 RECEIVE HIGH BYTE RECEIVE MIDDLE BYTE RECEIVE LOW BYTE 8 BIT 12 BIT 16 BIT 24 BIT STD X FFEF 23 16 15 8 7 0 7 0 7 0 7 0 RECEIVE HIGH BYTE RECEIVE MIDDLE B...

Page 289: ...T MIDDLE BYTE TRANSMIT LOW BYTE 8 BIT 12 BIT 16 BIT 24 BIT SRD X FFEF 23 16 15 8 7 0 7 0 7 0 7 0 RECEIVE HIGH BYTE RECEIVE MIDDLE BYTE RECEIVE LOW BYTE 23 16 15 8 7 0 7 0 7 0 7 0 RECEIVE HIGH BYTE REC...

Page 290: ...ly The transmit data output STD is three stated except during the data transmission peri od The optional frame sync output flag outputs and clock outputs are not three stated even if both receiver and...

Page 291: ...usly reset At this point the SSI is ready to transmit except that the interrupt is masked because the MR was cleared on reset and Port C is still configured as general purpose I O Unmasking the interr...

Page 292: ...to 4 MOVE 0 X0 Initialize channel flag for SSI flag MOVE X0 X FLG Start with right channel first Initialize SSI Port MOVEP 3000 X IPR Set interrupt priority register for SSI MOVEP 401F X CRA Set conti...

Page 293: ...The DSP program has to read the data from RX before a new data word is transferred from the receive shift register otherwise the receiver overrun error will be set ROE 1 Figure 6 74 illustrates the p...

Page 294: ...eft or right data buffer depending on the results of the test The RTI instruction then returns control to the main program which will wait for the next interrupt SSI and other I O EQUATES IPR EQU FFFF...

Page 295: ...e in which the DSP would interface to a TDM codec network or a network of DSPs is compatible with Bell and CCITT PCM data operation for mats The DSP may be a master device see Figure 6 75 that control...

Page 296: ...ade to see if it is the beginning of a frame If it is the beginning of a frame SLOTCT1 is cleared to start counting the time slots If it is not the beginning of a frame SLOTCT1 is incremented The next...

Page 297: ...A TO TX WRITE DUMMY DATA TO TSR EXIT YES NO NO YES RECEIVER FULL INTERRUPT TEST FOR FRAME SYNC RFS 1 CLEAR SLOT NUMBER SLOTCT2 0 INCREMENT SLOT NUMBER SLOTCT2 SLOTCT2 1 IS DATA FOR ME SLOTCT2 MYSLOT K...

Page 298: ...and WL0 In this example an 8 bit word length was chosen WL1 0 and WL0 0 2 The number of time slots is selected by setting DC4 DC0 Four time slots were chosen for this example DC4 DC0 03 3 The serial...

Page 299: ...ONTROL 1 SYNCHRONOUS SCD2 SERIAL CONTROL 2 DIRECTION 1 OUTPUT MASTER 0 INPUT SLAVE SCKD CLOCK SOURCE DIRECTION 1 OUTPUT MASTER 0 INPUT SLAVE FLS0 FRAME SYNC LENGTH 0 0 TX RX SYNC SAME LENGTH FSL1 FRAM...

Page 300: ...h new data for the next time slot Software can also write to TSR to prevent transmitting in the next time slot Failing to reload TX or writing to the TSR before the transmit shift register is finished...

Page 301: ...ot is for the right channel If the current time slot is for the left channel the TSR is written which three states the output to allow another DSP to transmit the left channel during the time slot SSI...

Page 302: ...n SSI port JMP Wait for interrupt MAIN INTERRUPT ROUTINE XMT JSET 0 X FLG LEFT Check user flag RIGHT BCLR 0 X CRB Clear SC0 indicating right channel data MOVEP X R0 X TX Move data to TX register MOVE...

Page 303: ...ill be MOVE 3 M0 split between two buffers which are MOVE 3 M1 modulus 4 Initialize SSI Port MOVEP 3000 X IPR Set interrupt priority register for SSI MOVEP 4100 X CRA Set word length 16 bits MOVEP AB0...

Page 304: ...t is enabled RIE 1 The second data word second time slot in the frame begins shifting in immediately after the transfer of the first data word to the RX The DSP program has to read the data from RX wh...

Page 305: ...d as the on demand mode of the SSI because it is the only data driven mode of the SSI i e data is transferred whenever data is present see Figure 6 80 and Figure 6 81 STD and SCK from DSP1 are connect...

Page 306: ...t after everything else is configured and the DSP is ready to receive interrupts 5 The network mode must be selected MOD 1 6 A gated clock GCK 1 is selected in this example A continuous clock exam ple...

Page 307: ...OF0 MOD SSI MODE SELECT 1 NETWORK GCK GATED CLOCK CONTROL 1 GATED CL0CK SYN SYNC ASYNC CONTROL 0 ASYNCHRONOUS SCD0 SERIAL CONTROL 2 DIRECTION 0 INPUT SCKD CLOCK SOURCE DIRECTION 1 OUTPUT SSI CONTROL R...

Page 308: ...the transmit shift register is empty The receive and transmit in terrupts function as usual using TDE and RDF however transmit and receive underruns are impossible for on demand transmission and are...

Page 309: ...0 to two makes the buffer circular modulo 3 which saves the step of resetting the pointer each loop PC3 is con figured as a general purpose output for use as a scope sync and CRA and CRB are then init...

Page 310: ...ransmit DC 330000 DC F00000 MAIN PROGRAM ORG P 40 MOVE 0 R0 Pointer to data buffer MOVE 2 M0 Length off buffer is 3 Figure 6 85 On Demand Mode Transmit Example Program Sheet 1 of 2 DSP56002 PC3 SC2 ST...

Page 311: ...E3 JCLR 6 X SSISR TDE3 Wait for TDE 1 FSC JSET 5 X PCD FSC Wait for frame sync to go low NOTE State of frame sync is directly determined by reading PC5 BCLR 3 X PCD Set PC3 lo example external enable...

Page 312: ...E 0 R0 Pointer to data buffer MOVE 2 M0 Length of buffer is 3 MOVEP 001F X CRA Set Word Length 8 CLK 5 12 32 MHz MOVEP 1E30 X CRB Enable receiver Mode On Demand gated clock on synchronous mode Word fr...

Page 313: ...cts to enable the appropriate codec for I O This procedure allows the transmit lines to be ORed together The appropriate out put flag pin changes at the same time as the first bit of the transmit word...

Page 314: ...flags are double buffered with transmit data 3 Output flags change when data is transferred from TX to the transmit data shift register 4 Initial flag outputs last flag output value 5 Data and flags...

Page 315: ...XO DSP5002 SRD STD SCK SC0 SC1 MICROPHONE SPEAKER PHONE LINE INPUT PHONE LINE OUTPUT OUTPUT FLAG 1 OUTPUT FLAG 0 OF0 OF1 SPEAKER PHONE Figure 6 88 Output Flag Example NOTE SC0 and SC1 are output flag...

Page 316: ...CLOCK SOURCE DIRECTION 1 OUTPUT SCD1 AND SCD0 SERIAL CONTROL 1 AND 0 DIRECTION 1 OUTPUT 0 1 FILTER 1 1 0 FILTER 2 TRANSMIT DATA B7 B6 B5 B4 B3 B2 B1 B0 OUTPUT FLAG VALID OUTPUT FLAG OF0 AND LF1 ARE C...

Page 317: ...n provide Cascading DSPs in this manner is useful in several network topologies including star and ring networks RECEIVE CLOCK RECEIVE DATA B7 B6 B5 B4 B3 B2 B1 B0 7 6 5 4 3 2 1 0 RDF TDE ROE TUE RFS...

Page 318: ...ay which is applicable to matrix relaxation processing is shown in Figure 6 95 To simplify the drawing only the center DSP is connected in this illustration In use all DSPs would have four three state...

Page 319: ...L CLOCK SERIAL SYNC DSP56002 SRD STD SCK SC2 DSP56002 SRD STD SCK SC2 DSP56002 SRD STD SCK SC2 SERIAL DATA IN SERIAL DATA OUT Figure 6 92 SSI TDM Parallel DSP Network Freescale Semiconductor I Freesca...

Page 320: ...C2 DSP56002 SRD STD SCK SC2 DSP56002 SRD STD SCK SC2 DSP56002 SRD STD SCK SC2 DSP56002 SRD STD SCK SC2 DSP56002 SRD STD SCK SC2 DSP56002 SRD STD SCK SC2 Figure 6 93 SSI TDM Connected Parallel Processi...

Page 321: ...02 SRD STD SCK SC2 DSP56002 SRD STD SCK SC2 DSP56002 SRD STD SCK SC2 DSP56002 SRD STD SCK SC2 DSP56002 SRD STD SCK SC2 SERIAL IN SERIAL OUT Figure 6 94 SSI TDM Serial Parallel Processing Array DSP5600...

Page 322: ...2 SRD STD SCK SC2 DSP56002 SRD STD SCK SC2 DSP56002 SRD STD SCK SC2 DSP56002 SRD STD SCK SC2 DSP56002 SRD STD SCK SC2 DSP56002 SRD STD SCK SC2 DSP56002 SRD STD SCK SC2 Figure 6 95 SSI Parallel Process...

Page 323: ...SC2 SERIAL DATA BUS SERIAL CLOCK DSP56002 STD SRD SCK SC2 DSP56002 STD SRD SCK SC2 DSP56002 STD SRD SCK SC2 SERIAL SYNC Figure 6 96 SSI TDM Bus DSP Network Freescale Semiconductor I Freescale Semicon...

Page 324: ...D SRD SCK SC2 SC1 SC0 DSP56002 SLAVE 3 STD SRD SCK SC2 SC1 SC0 MASTER TRANSMIT MASTER RECEIVE MASTER CLOCK MASTER SYNC FLAG 1 FLAG 0 NOTE Flags can specify data types control address and data Figure 6...

Page 325: ...MOTOROLA 7 1 SECTION 7 DSP56002 TIMER AND EVENT COUNTER Freescale Semiconductor I Freescale Semiconductor Inc For More Information On This Product Go to www freescale com nc...

Page 326: ...EGISTER TCR 7 4 7 4 TIMER CONTROL STATUS REGISTER TCSR 7 5 7 5 TIMER EVENT COUNTER MODES OF OPERATION 7 7 7 6 TIMER EVENT COUNTER BEHAVIOR DURING WAIT and STOP 7 16 7 7 OPERATING CONSIDERATIONS 7 17 7...

Page 327: ...O pin becomes three stated To prevent undes ired spikes from occurring the TIO pin should be pulled up or down when it is not in use 7 2 TIMER EVENT COUNTER BLOCK DIAGRAM Figure 7 1 shows a block diag...

Page 328: ...the timer is enabled TE 1 and the user program writes to the TCR the value is stored there and will be loaded into the counter after the counter has been decremented to zero and a new event occurs In...

Page 329: ...terrupts are disabled Hardware and software resets clear TIE 7 4 3 Inverter INV Bit 2 The INV bit affects the polarity of the external signal coming in on the TIO input and the polarity of the output...

Page 330: ...proper functionality the GPIO function is enabled only if TC2 TC0 are all 0 zero and the GPIO bit is set 7 4 5 General Purpose I O GPIO Bit 6 If the GPIO bit is set GPIO 1 and if TC2 TC0 are all zero...

Page 331: ...utput pin TC2 TC0 are all zero and DIR 1 writing to the DO bit writes the data to the TIO pin However if the INV bit is set the data written to the TIO pin will be inverted When GPIO mode is disabled...

Page 332: ...e 1 is defined by TC2 TC0 equal to 001 With the timer enabled TE 1 the counter is loaded with the value contained by the TCR The counter is decremented by a clock derived from the DSP s internal clock...

Page 333: ...al Clock Output Toggle Enabled Timer Mode 2 is defined by TC2 TC0 equal to 010 With the timer enabled TE 1 the counter is loaded with the value contained by the TCR The counter is decremented by a clo...

Page 334: ...nes the polarity of the TIO output Figure 7 7 illustrates Timer Mode 2 7 5 4 Timer Mode 4 Pulse Width Measurement Mode Timer Mode 4 is defined by TC2 TC0 equal 100 In this mode TIO acts as a gating si...

Page 335: ...read the TCR which now represents the widths of the TIO pulse The process is repeated until the timer is disabled TE 0 The INV bit determines whether the counting is enabled when TIO is high INV 0 or...

Page 336: ...e counter is loaded in the TCR The user s program can read the TCR and subtract consecutive values of the counter to determine the distance between TIO edges The counter is not stopped and it continue...

Page 337: ...at any given moment At the tran sition following the point where the counter reaches 0 the TS bit in TCSR is set and if the TIE is set an interrupt is generated The counter will wrap around and the p...

Page 338: ...the transitions of the signal coming in on the TIO input pin At the transition that occurs after the counter has reached 0 the TS bit in TCSR is set and if the TIE is set the timer generates an inter...

Page 339: ...er clocks are active and the timer ac tivity continues undisturbed If the timer interrupt is enabled when the final event occurs an interrupt will be generated and serviced It is recommended that the...

Page 340: ...he TCR is loaded with 0 and the counter contained a non zero value before the TCR was loaded then after the timer is enabled it will count 224 events generate an interrupt and then generate an interru...

Page 341: ...ount is completed and then generate an interrupt for every new event 7 8 SOFTWARE EXAMPLES 7 8 1 General Purpose I O Input The following routine can be used to read the TIO input pin MOVEP 000040 X TC...

Page 342: ...utput pin MOVEP 000140 X TCSR clear TC2 TC0 set GPIO and set DIR for GPIO output set TIO to 0 BSET DO X TCSR set TIO to 1 NOP TE TCR Write Preload N TIO Event Counter N FFFF 0 Interrupt First Event La...

Page 343: ...rd timer mode with simultaneous GPIO The timer is used to activate an internal task after 65536 clocks at the end of the task the TIO pin is toggled to signal end of task ORG P 3C this is timer interr...

Page 344: ...into the counter BSET IPL X IPR enable IPL for timer ANDI CF MR remove interrupt masking in status register BSET TE X TCSR timer enable application program task task instructions end_of_task TE TCR W...

Page 345: ...interrupt ORG P MAIN_BODY MOVE PULSE_WIDTH r0 r0 points to start of table MOVE FF M0 modulo 100 to wrap around on end of table MOVEP 000026 X TCSR enable timer interrupts mode 4 and set INV to measure...

Page 346: ...A X TCSR enable timer interrupts mode 5 BSET IPL X IPR enable IPL for timer ANDI CF MR remove interrupt masking in status register BSET TE X TCSR timer enable do other tasks measure MOVEP X TCR A read...

Page 347: ...1010100011010101 1001011001110100 0100101001011010 1010101010110110 1010101010010111 0101001010010111 1000101010100100 0100010101011101 1010100011010101 1001011001110100 1000101010100100 010001010101...

Page 348: ...SECTION CONTENTS A 2 BOOTSTRAP AND ROM CODE MOTOROLA A 1 INTRODUCTION A 3 Freescale Semiconductor I Freescale Semiconductor Inc For More Information On This Product Go to www freescale com nc...

Page 349: ...is will terminate the boot strap loading operation and start executing the loaded program at location P 0 of the internal program RAM If MC MB MA 11x the program loads program RAM from the SCI interfa...

Page 350: ...ister Low ORG PL 0 PL 0 bootstrap code starts at 0 START MOVE 0 R0 default P address where prog will begin loading JCLR 4 OMR EPROMLD If MC MB MA 0xx go load from EPROM JSET 1 OMR SCILD If MC MB MA 11...

Page 351: ...ess of 2nd 32 word bootstrap ROM EXTC MOVEP C000 X SCCR Configure SCI Clock Control Reg MOVEP 7 X PCC Configure SCLK TXD and RXD _SCI1 DO 6 _LOOP6 get 3 bytes for number of program words and 3 bytes f...

Page 352: ...ting mode to 0 and trigger an exit from bootstrap mode ANDI 0 CCR Clear CCR as if RESET to 0 Delay needed for Op Mode change JMP R1 Then go to starting Prog addr End of bootstrap code Number of progra...

Page 353: ...egisters are grouped between the central processing module and each peripheral Each register includes the name address reset value and meaning of each bit The sheets provide room to write the value fo...

Page 354: ...TERRUPT VECTOR ADDRESSES B 4 B 3 INSTRUCTIONS B 5 B 4 CENTRAL PROCESSOR B 10 B 5 GP I O B 14 B 6 HOST B 16 B 7 SCI B 21 B 8 SSI B 24 B 9 TIMER B 27 Freescale Semiconductor I Freescale Semiconductor In...

Page 355: ...SCI CONTROL REGISTER SCCR SCI INTERFACE STATUS REGISTER SSR SCI INTERFACE CONTROL REGISTER SCR SSI RECIEVE TRANSMIT DATA REGISTER RX TX SSI STATUS TIME SLOT REGISTER SSISR TSR SSI CONTROL REGISTER B C...

Page 356: ...ception Status 0018 0 2 SCI Transmit Data 001A 0 2 SCI Idle Line 001C 0 2 SCI Timer 001E 3 NMI 0020 0 2 Host Receive Data 0022 0 2 Host Transmit Data 0024 0 2 Host Command default 0026 0 2 Available f...

Page 357: ...CHG n X aa 1 ea 4 mvb n X pp n X ea n Y aa n Y pp n Y ea n D BCLR n X aa 1 ea 4 mvb n X pp n X ea n Y aa n Y pp n Y ea n D BSET n X aa 1 ea 4 mvb n X pp n X ea n Y aa n Y pp n Y ea n D BTST n X aa 1 e...

Page 358: ...aa xxxx n X pp xxxx n Y ea xxxx n Y aa xxxx n Y pp xxxx n S xxxx JSET n X ea xxxx 2 6 jx n X aa xxxx n X pp xxxx n Y ea xxxx n Y aa xxxx n Y pp xxxx n S xxxx JSR xxx 1 ea 4 jx ea JSSET n X ea xxxx 2 6...

Page 359: ...ea S2 D2 xxxxxx D1 S2 D2 A X ea X0 A B X ea X0 B Y memory data move Y ea D mv mv Y aa D S Y ea S Y aa xxxxxx D Register and Y memory S1 D1 Y ea D2 mv mv data move S1 D1 S2 Y ea S1 D1 xxxxxx D2 Y0 A A...

Page 360: ...ea Y pp MPY S2 S1 D parallel move 1 mv 2 mv S1 S2 D parallel move S n D no parallel move 1 2 MPYR S2 S1 D parallel move 1 mv 2 mv S1 S2 D parallel move S n D no parallel move 1 2 NEG D parallel move 1...

Page 361: ...D1 S2 D2 TFR S D parallel move 1 mv 2 mv TST S parallel move 1 mv 2 mv 0 WAIT 1 n a NOTATION denotes the bit is unaffected by the operation denotes the bit may be set according to the definition depen...

Page 362: ...erved Trace Mode Double Precision Multiply Mode Loop Flag Reset 0300 DM S Mode Register MR Condition Code Register CCR Port A Bus Control Register BCR X FFFE Read Write 15 14 13 12 11 10 9 8 7 6 5 4 3...

Page 363: ...e 0 1 Yes 0 1 0 Yes 1 1 1 Yes 2 Reset 000000 CENTRAL PROCESSOR Register IPR 23 22 21 20 19 18 16 17 0 0 0 0 0 0 0 0 0 0 0 0 SSL1 SSL0 Enabled IPL 0 0 No 0 1 Yes 0 1 0 Yes 1 1 1 Yes 2 SCL1 SCL0 Enabled...

Page 364: ...m as zero Mode M M M Operating Mode C B A 0 0 0 0 Single Chip Mode 1 0 0 1 Bootstrap from EPROM 2 0 1 0 Normal Expanded Mode 3 0 1 1 Development Mode 4 1 0 0 Reserved 5 1 0 1 Bootstrap from Host 6 1 1...

Page 365: ...0 0 Clock Out Enabled Full Strength Output Buffer 0 1 Clock Out Enabled 2 3 Strength Output Buffer 1 0 Clock Out Enabled 1 3 Strength Output Buffer 1 1 Clock Out Disabled XTAL Disable Bit XTLD 0 Enab...

Page 366: ...00000 Port B Data Register PBD X FFE4 Read Write Reset 000000 0 0 Port B Data usually loaded by program Port B Data Direction Control 0 Input 1 Output Port B Reserved Program as zero Sheet 1 of 2 23 0...

Page 367: ...CC2 CC1 CC0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 PD8 PD7 PD6 PD5 PD4 PD3 PD2 PD1 PD0 0 0 0 0 0 Port C Pin Control 0 General Purpose I O Pin 1 Peripheral Pin Reserved Program as zero Sheet...

Page 368: ...Read Write Flags Reserved Program as zero 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Port B Control Register PBC X FFE0 Read Write Reset 000000 Port B 0 0 0 DSP SIDE 23 0...

Page 369: ...ost Transmit Data Register HTX X FFEB Write Only Reset 000000 Host Transmit Data usually loaded by program 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 TRANSMIT MIDDLE BYTE TRANSMIT LOW BYTE 15 14 13 12 11 1...

Page 370: ...Bit DMA 10 16 Bit DMA 11 8 Bit DMA Receive Request Enable DMA Off 0 Interrupts Disabled 1 Interrupts Enabled DMA On 0 Host DSP 1 DSP Host 7 INIT 6 5 0 PROCESSOR SIDE Command Vector Register CVR 1 Rea...

Page 371: ...er Full 0 Wait 1 Read 7 HREQ 6 5 0 PROCESSOR SIDE DMA TRDY Host Request 0 HREQ Deasserted1 HREQ Asserted Interrupt Vector Register IVR 3 Read Write Reset 0F 4 3 2 1 0 IV4 IV3 IV2 IV1 IV0 Exception vec...

Page 372: ...7 0 RECEIVE MIDDLE BYTE RECEIVE LOW BYTE 7 0 7 0 NOT USED TRANSMIT HIGH BYTE Transmit Byte Registers 7 6 5 4 Write Only Reset 00 0 0 0 0 0 0 0 0 RECEIVE HIGH BYTE NOT USED 7 6 5 4 7 6 5 4 TRANSMIT LOW...

Page 373: ...ed Or Mode Select 1 Multidrop 0 Point to Point Transmitter Enable 0 Transmitter disabled 1 Transmitter enabled Transmit Interrupt Enable 0 Transmit Interrupts disabled 1 Transmit Interrupts enabled Id...

Page 374: ...for receiver 1 External clock from SCLK Transmitter Clock Mode Source 0 Internal clock for transmitter 1 External clock from SCLK SCI Status Register SSR Address X FFF1 Read Only Reset 000003 7 6 5 4...

Page 375: ...gister decoded at three different addresses X0 A B C SCI Transmit Data Registers Address X FFF4 X FFF6 Read Write Reset xxxxxx SCI Receive Data Registers Address X FFF4 X FFF6 Read Write Reset xxxxxx...

Page 376: ...24 Bits Word Frame Rate Divider Control 00000 1 11111 32 Port C Control Register PCC X FFE1 Read Write Reset 0000 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 CC8 CC7 CC6 CC5 CC4 CC3 CC2 CC1 CC0 0 0 0 0 0 P...

Page 377: ...e 1 Enable Receive Interrupt Enable 0 Disable 1 Enable Receive Enable 0 Disable 1 Enable Transmit Interrupt Enable 0 Disable 1 Enable Gated Clock Control 0 Continuous Clock1 Gated Clock Output Flag x...

Page 378: ...ror Flag 0 OK 1 Error Transmit Data Register Empty 0 Wait 1 Write Transmit Frame Sync 0 Sync Inactive1 Sync Active Receive Data Register Full 0 Wait 1 Read Serial Input Flag 0 If SCD0 0 and SYN 1 latc...

Page 379: ...1 Output Internal Timer Pulse 0 1 0 Output Internal Timer Toggle 0 1 1 X X Undefined 1 0 0 Input Internal Input Width 1 0 1 Input Internal Input Period 1 1 0 Input External Standard Time Counter 1 1 1...

Page 380: ......

Page 381: ...MOTOROLA INDEX 1 INDEX Freescale Semiconductor I Freescale Semiconductor Inc For More Information On This Product Go to www freescale com nc...

Page 382: ......

Page 383: ...2 frame rate divider control DC0 DC4 6 87 CRB 6 88 bit 0 serial output flag 0 OF0 6 88 bit 1 serial output flag 1 OF1 6 88 bit 10 gated control clock GCK 6 91 bit 11 mode select MOD 6 92 bit 12 transm...

Page 384: ...st transmit interrupt enable HTIE 5 14 bit 2 host command interrupt enable HCIE 5 14 bit 3 host flag 2 HF2 5 14 bit 4 host flag 3 HF3 5 15 bits 5 6 7 reserved 5 15 HEN 2 9 5 32 HF0 5 16 5 19 5 23 read...

Page 385: ...lize bit INIT 5 24 IDLE 6 23 IF0 6 94 IF1 6 94 ILIE 6 20 6 39 INIT 5 24 Instruction Set Summary B 5 Internal Processing DSP to host 5 59 host to DSP 5 56 INterrupt Sources B 4 Interrupt host command 5...

Page 386: ...de 6 bootstrap from SCI 3 12 mode 7 reserved mode 3 12 setting changing 3 7 summary 3 8 OR 6 23 P PBC 5 4 PBD 5 4 PBDDR 5 4 PCAP 2 13 PCC 6 4 PCD 6 4 PCDDR 6 4 PE 6 23 PEN 2 14 Peripheral Memory Map B...

Page 387: ...cc 2 13 R R8 6 24 RCM 6 26 RD 2 5 RDF 6 97 RDRF 6 23 RE 6 92 Receive Byte Registers RXH RXM RXL 5 29 B 20 Reset register contents and 5 17 RESET Pin 2 7 RFS 6 95 RIE 6 21 6 37 6 39 6 93 ROE 6 96 RREQ...

Page 388: ...examples 6 127 normal network 6 112 on demand mode examples 6 145 SSI Pins 2 10 6 78 serial clock SCK 6 80 serial clock zero SC0 2 10 serial control SC0 6 82 serial control SC1 6 82 serial control SC2...

Page 389: ...xample 7 21 Mode 5 7 12 Mode 5 Example 7 22 Mode 6 7 13 Mode 7 7 15 Operating Considerations 7 17 Period Measurement Mode 7 12 7 15 7 16 Programming Model 7 4 PWM Mode 7 11 7 13 7 14 Timer Control Sta...

Page 390: ...Freescale Semiconductor I Freescale Semiconductor Inc For More Information On This Product Go to www freescale com nc...

Page 391: ...use as components in life support devices or systems intended for surgical implant into the body or intended to support or sustain life Buyer agrees to notify Motorola of any such intended end use whe...

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