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7-4

UART

7.2.1 UART Register Summary

The system programmer may access any of the UART registers summarized in Table 71. via the
processor. These registers control the UART operations including transmission and reception of data. Each
register bit in the table has its name and reset state shown.

Table 71. Summary of UART Registers (Big Endian Notation)

Register

Name

A

d
d

r

e
s

s

a

a. DLAB concatenated with LTADR2 through LTADR0.

A

l
i

a
s

Function of Each Bit

0 1

2

3

4

5

6

7

Receiver Buffer
Register (read only)

0000

RBR

Data
Bit 0

Data
Bit 1

Data
Bit2

Data
Bit 3

Data
Bit 4

Data
Bit 5

Data
Bit 6

Data
Bit 7

b

b. Bit 7 is the least significant bit (lsb). It is the first bit serially transmitted and received.

Transmitter Holding
Register (write only)

0000

THR

Data
Bit 0

Data
Bit 1

Data
Bit 2

Data
Bit 3

Data
Bit 4

Data
Bit 5

Data
Bit 6

Data
Bit 7

Interrupt Enable
Register (read and
write)

0001

IER

0

0

0

0

0

Enable
Receiver
Line
Status
Interrupt
(ELSI)

Enable
Transmitter
Holding
Register
Empty
Interrupt
(ETHREI)

Enable
Receive
Data
Available
Interrupt
(ERDAI)

Interrupt Identification
Register (read only)

X010

IIR

FIFOs
Enabled

FIFOs
Enabled

0

0

InterruptID
Bit 2

c

c. This bit is always zero in character mode.

d. The only valid bit of the MCR in this two-wire implementation of the UART is MCR bit 4, the Loopback Mode bit, which can be used for diagnostic purposes.

Note: Register bit definitions are shown in big-endian notation. (bit 7 is lsb and bit 0 is msb.)

Interrupt ID
Bit 1

Interrupt
ID
Bit 0

“0” if
Interrupt
Pending

FIFO Control Register
(write only)

X010

FCR

RCVR
Trigger
(MSB)

RCVR
Trigger
(LSB)

Reserved

Reserved

DMA
Mode
Select

XMIT
FIFO
Reset

RCVR
FIFO
Reset

FIFO
Enable

Line Control Register
(read and write)

X011

LCR

Divisor
Latch
Access
Bit
(DLAB)

Set Break

Stick Parity

Even
Parity
Select
(EPS)

Parity
Enable
(PEN)

Number
of Stop
Bits
(STB)

Word
Length
Select
Bit 1 (WLS1)

Word
Length
Select
Bit 0
(WLS0)

Modem Control
Register (read and
write)

d

X100

MCR

Reserved

Reserved

Reserved

Reserved

Loopback
Mode

Reserved

Reserved

Reserved

Line Status Register
(read and write)

X101

LSR

Error in
Receiver
FIFO

TransmitterE
mpty
(TEMT)

Transmitter
Holding
Register
(THRE)

Break
Interrupt
(BI)

FramingErr
or
(FE)

Parity
Error
(PE)

Overrun Error
(OE)

Data
Ready
(DR)

Scratch Register (read
and write)

X111

SCR

Data
Bit 0

Data
Bit 1

Data
Bit2

Data
Bit 3

Data
Bit 4

Data
Bit5

Data
Bit6

Data
Bit 7

Divisor Latch (LSB)

(read and write)

1000

DLL

Data
Bit 8

Data
Bit 9

Data
Bit 10

Data
Bit 11

Data
Bit 12

Data
Bit 13

Data
Bit 14

Data
Bit 15

Divisor Latch (MSB)

(read and write)

1001

DLM

Data
Bit 0

Data
Bit 1

Data
Bit 2

Data
Bit 3

Data
Bit 34

Data
Bit 5

Data
Bit 6

Data
Bit 7

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Summary of Contents for CPC700

Page 1: ...CPC700 Memory Controller and PCI Bridge User s Manual Version 1 1 Issue Date 3 22 00 Preliminary...

Page 2: ...ation contained herein Nothing in this document shall operate as an express or implied license or indemnity under the intellectual property rights of IBM or third parties The products described in thi...

Page 3: ...esses 3 8 3 8 Processor Address Only Cycles 3 10 3 9 Processor Bus Arbiter 3 11 3 10 Broadcast Snoop Cycles 3 12 3 11 Byte Swapping 3 13 3 11 1 Processor to PLB PCI Byte Swapping 3 13 3 11 2 PCI to Me...

Page 4: ...1 4 1 Features 4 1 4 2 Memory Controller Block Diagram 4 2 4 3 Memory Controller Registers 4 3 4 4 Memory Access Arbiter 4 4 4 5 SDRAM 4 4 4 5 1 Initialization Sequence 4 5 4 5 2 Page Mode Accesses 4...

Page 5: ...ter 4 58 Chapter 5 PCI Interface 5 1 5 1 Overview 5 1 5 2 Features 5 1 5 3 PCI Bridge Block Diagram 5 2 5 4 PCI Interface Registers 5 3 5 5 PCI Interface Address Maps 5 4 5 5 1 PLB Address Map 5 4 5 5...

Page 6: ...er PCICFGADR 5 26 5 9 2 3 PCI Configuration Data Register PCICFGDATA 5 26 5 9 3 PCI Interface Configuration Registers 5 26 5 9 3 1 PCI Vendor ID Register 5 27 5 9 3 2 PCI Device ID Register 5 27 5 9 3...

Page 7: ...5 48 5 11 1 3 Other Registers that must be Initialized 5 50 5 11 1 4 Target Bridge Initialization 5 50 Chapter 6 Clock Power Management and Reset 6 1 6 1 CPC700 Clock Control 6 1 6 1 1 PLL Tuning 6 1...

Page 8: ...rol Register 8 14 8 5 Interrupts 8 15 8 6 General Considerations 8 16 Chapter 9 General Purpose Timers 9 1 9 1 Introduction 9 1 9 1 1 GPT Registers 9 1 9 1 2 Programmability 9 2 9 2 Mode of Operation...

Page 9: ...10 8 10 5 9 UICVR UIC Vector Register 10 9 Chapter 11 JTAG 11 1 Chapter 12 Processor Local Bus PLB 12 1 12 1 PLB Master Priority Assignment 12 1 12 2 PLB Arbiter Registers 12 2 12 2 1 PLB Arbiter Cont...

Page 10: ...Table of Contents x Table of Contents...

Page 11: ...1 CPU Write Write 4 22 Figure 22 PCI Continuous Read Burst 4 23 Figure 23 Continuous Write Burst 4 24 Figure 24 PCI Short Burst Read PCI Short Burst Read 4 25 Figure 25 PCI Short Burst Read PCI Short...

Page 12: ...9 9 Figure 56 UICSR UIC Status Register 10 5 Figure 57 UICSRS UIC Status Register Set 10 5 Figure 58 UICER UIC Interrupt Enable Register 10 6 Figure 59 UICCR UIC Critical Interrupt Register 10 6 Figur...

Page 13: ...alid Address TBST_N and TSIZ Combinations 3 20 Table 21 Memory Controller Register Addressing 4 3 Table 22 Offsets for Memory Controller Registers 4 3 Table 23 Determining Maximum Page Size 4 5 Table...

Page 14: ...ration Access Register 6 8 Table 68 PLL Tuning Control Register 6 8 Table 69 Strapping Pin Register 6 9 Table 70 UART Core Configuration Registers 7 3 Table 71 Summary of UART Registers Big Endian Not...

Page 15: ...egister Addressing 14 1 Table 105 Offsets for Processor Interface Registers 14 1 Table 106 Memory Controller Register Addressing 14 2 Table 107 Offsets for Memory Controller Registers 14 2 Table 108 P...

Page 16: ...Tables xvi List of Tables...

Page 17: ...herals PCI Revision 2 1 Compliant Interface 32 bit 25 to 66 MHz PCI Bus Interface may be configured to operate synchronously or asynchronously to the processor bus synchronous clock is limited to 33 M...

Page 18: ...o independent IIC ports If the design requires additional functionality an integrated peripheral bus supports 8 16 32 or 64 bit device operations for external peripherals This bus also sup ports the B...

Page 19: ...0 User s Manual Preliminary 1 3 Figure 1 System Block Diagram 60x 7xx Bus 2 UARTs 2 I2C Interrupts PCI Devices PCI Bus SDRAM PCI arbiter CPC700 Timers PowerPC 60x 7xx Processor ROM SRAM External Perip...

Page 20: ...o primary busses the Processor Local Bus PLB and the On Chip Peripheral Bus OPB The PLB operates at the same frequency as the local processor bus The OPB operates at half of the frequency of the PLB P...

Page 21: ...ary resources independently This map ping can be performed solely from the processor side or from a combination of the processor and the PCI side This mechanism lets the same fixed secondary resources...

Page 22: ...7FFF FFFF 2GB PCI Core Space 8000 0000 FF4F FFFF 2GB 11MB PCI Memory 8000 0000 F7FF FFFF PCI I O F800 0000 F800 FFFF Reserved F801 0000 F87F FFFF PCI I O F880 0000 FBFF FFFF Reserved FC00 0000 FEBF F...

Page 23: ...figurations The memory controller supports up to five banks five Chip Select outputs Bank 0 is dedi cated to Boot ROM while banks 1 4 may be programmed to support either SDRAM ROM SRAM or external per...

Page 24: ...support 32 or 64 bit data bus widths Support for mixing ECC and non ECC DIMMs in the same system ECC checking may be disabled UART The CPC700 contains two UARTs that provide two wire full duplex seri...

Page 25: ...cations link IIC Bus Interface The CPC700 provides two fully independent IIC bus interfaces The IIC bus is a two wire bidirectional open drain low speed serial interface Both the serial clock SCL and...

Page 26: ...ted Synchronous level sensitive Synchronous edge capture Asynchronous Choice of edge or level sensitive triggering is programmable Polarity is programmable for all types Prioritized interrupt handler...

Page 27: ...well as for the support of board level testing and debug The following JTAG commands are supported by the CPC700 JTAG TAP controller 1 EXTEST 2 SAMPLE PRELOAD 3 BYPASS 4 CLAMP 5 IDCODE 6 USERCODE The...

Page 28: ...1 12 CPC700 User s Manual Preliminary...

Page 29: ...parity pin to processor data paths is as follows DP0 DH0 DH7 DP2 DH8 DH15 DP3 DH16 DH23 DP4 DH24 DH31 If the internal PCI arbiter is enabled these signals carry the PCI Request inputs 2 5 providing fo...

Page 30: ...he bus and acts as an output when the CPC700 initiates a snoop cycle on behalf of a PCI master access to local memory BR_N Low I Bus Request Processor bus request from the local processor BG_N Low O B...

Page 31: ...actively driven indicates the driving device has decoded its address as the target of the current access IDSEL High I Initialization Device Select Used as a chip select during configuration read and...

Page 32: ...rbiter will be disabled GNT0_N REQ_N Low O Grant 0 Request When the internal PCI arbiter is enabled this signal functions as the Grant 0 output to another PCI master device When the internal PCI arbit...

Page 33: ...ECC or the additional DQM lines are governed by a pin strapping option DQM7 corresponds to Memory Data Lane 7 MA 12 0 High O Memory Address 12 0 Memory address bus Memory address bit 10 also functions...

Page 34: ...nd hold the higher order address bits of the ROM peripheral address The ROM_ALE signal may be used as a latch enable for an external address bus latch to capture those signals ROM_READY High I ROM Rea...

Page 35: ...errupt the processor These interrupt inputs are asynchronous and may be programmed to cause an interrupt on either the rising or falling edge IRQ_OUT_N Low O Interrupt Output Interrupt output to the l...

Page 36: ...DI2_N Low I Driver Inhibit 2 The driver inhibit 2 pin is only used during manufacturing test and must be high during functional operation There is an internal 20K pull up to 3 3V on this signal Eithe...

Page 37: ...port 32 Byte Write Buffer to memory 32 Byte Write Buffer to PLB lwarx stwcx support reservation cancelling snoops Address Only cycle support Machine Check Interrupt request input MCP_REQ for processor...

Page 38: ...e various configuration registers located within the processor interface Register Address R W Description PIFCFGADR FF50_0000 R W Processor Interface Configuration Address Register PIFCFGDATA FF50_000...

Page 39: ...Ending Address PLBMTLSA2 28 R W Processor PLB Master Byte Swap Region 2 Starting Address PLBMTLEA2 2C R W Processor PLB Master Byte Swap Region 2 Ending Address PLBMTLSA3 30 R W Processor PLB Master...

Page 40: ...nge Description Processor Address 0 to 2G 1 h00000000 h7FFFFFFF System Memory PCI accesses to this range will target system memory and be snooped Snooping can be dis abled for a particular region usin...

Page 41: ...C700 Response for Proc to Memory CPC700 Response for Proc to PLB 0000 Clean block or lwarx Address only Assert AACK_N No other response No PLB transaction 0001 Write with flush SBW or burst Memory wri...

Page 42: ...snooped in addition to the processor s L1 cache Write Buffer Once data is posted in the processor to memory write buffer it is flushed to memory at the earliest available opportunity In general the p...

Page 43: ...N to the processor data will be transferred at the earliest available opportunity Note In Table 8 the state of the processor to PLB write buffer is a don t care Table 9 lists the corresponding memory...

Page 44: ...nterface buffer to expedite de allocation of the primary 32 byte write buffer which allows the processor to post a maximum of two single beat write cycles for transfer to the PLB All processor to PLB...

Page 45: ...p er PLB Rd Allocated Allocated Idle Continue to attempt write on PLB initiate read on PLB when write completes PLB Rd Allocated Allocated Snoop Pending ARTRY_N CPU grant to snooper continue to attemp...

Page 46: ...ndary 2 8 byte read w byte enables Request W0 Read data transfer to CPU_DATA 0 31 Request W1 Read data transfer to CPU_DATA 32 63 Read 32 Bytes 8 Word Line 8 word line read consisting of 8 PLB data ph...

Page 47: ...when the processor initiates a bus transaction while parked as an implicit bus request which was granted and maintains the rotating priority accordingly In general the priority is controlled by a rota...

Page 48: ...d and snooped in the processor s L1 cache before allowing the access Snoop cycles to the processor are gener ated on behalf of the PCI interface by the internal snooper The following table lists the c...

Page 49: ...Endian No swapping mech anism is available for this data path 3 11 1 Processor to PLB PCI Byte Swapping Byte swapping can occur on the processor to PLB data path for both read and write cycles initia...

Page 50: ...to PLB Big Endian to Little Endian Byte Swapping Processor PLB Byte PLB 0 1 2 3 4 5 6 7 0 1 2 3 0 1 2 3 4 5 6 7 Processor PLB Byte PLB 0 1 2 3 4 5 6 7 0 1 2 3 0 1 2 3 4 5 6 7 Processor PLB Byte PLB 0...

Page 51: ...rdering within bytes is preserved such that PCI_BYTE0 7 0 corresponds to CPU MEM_BYTE0 0 7 For example if PCI_BYTE0 7 0 22 then CPU MEM_BYTE0 0 7 22 The following figure illustrates the byte preservat...

Page 52: ...is the LSB as seen from the local processor Using the default byte lane preservation method when the PCI accesses the same memory location the value will appear on the PCI bus as x 78563412 where byt...

Page 53: ...data from the PCI to memory is buffered in a 32 byte write buffer and when possible packed into 8 byte doubleword aligned transfers before being written to memory PCI to memory write cycles are buff e...

Page 54: ...Bus DCR Bus DCR access uses an indirect addressing method whereby a configuration address register and a configuration data register are used to address all of the configuration registers in the proc...

Page 55: ...ontroller Config data register xFF50_000C Table 19 CPC700 Response to Processor Interface Configuration Transactions Proc Proc Mem Write Buffer Proc PLB Write Buffer PLB SLV Snoop Response Conf Rd Dea...

Page 56: ...nsfer attribute errors Any processor read or write with TT 0 3 1010 or 1110 This includes ecowx eciwx and reserved transfer type encodings TT 0 4 10101 11101 1011x Any processor read or write with an...

Page 57: ...tect and report flash write errors for processor to memory write transfers which target the ROM Peripheral controller as well as banks for which flash writes are not enabled This event will also trigg...

Page 58: ...0x PLB master PLB_MErr will be asserted into the 60x PLB master by the targeted PLB slave on any 60x PLB transfer for which the responding PLB slave encounters an error In the CPC700 the only PLB slav...

Page 59: ...to this error condition in various ways depending on how it is programmed See Section 5 10 3 7 PLB Master PLB_MErr Detection for details If ECC is enabled and an uncorrectable error is encountered for...

Page 60: ...ister Description Processor interface registers are accessed through the PIFCFGADR and PIFCFGDATA registers To access one of the processor interface configuration registers write the appropriate index...

Page 61: ...e 1 Enable 2 SNP60x_DIS 0 Disable snoop cycles on processor bus 0 All PLB accesses to system memory are snooped 1 All PLB accesses to system memory are snooped except those that fall within the range...

Page 62: ...roller to generate an interrupt to the processor based on this condition or not See Section 3 16 17 PLBSWRINT PLB Slave Write Interrupt for information programming the PLB Slave Write Interrupt re gio...

Page 63: ...Enabled This bit enables the detection of PLB Slave errors associated with transfers initiated by the 60x PLB Master Errors are asserted by a slave via the Merr signal 3 PLBM_LEN 0 PLB Master Lock Err...

Page 64: ...transfer attributes for any errors associated with processor to memory transfers or processor transfers that generate an unsupported transfer type error 5 F_WR_ER_EN 0 Flash Write Error Enable 0 Detec...

Page 65: ...ntire 16KB region programmed into the ending address register Example To program the internal PCI registers using a byte swapping region from xFEC0_0000 through FF40_3FFF program the following registe...

Page 66: ...EA1 PLB Master Byte Swap Region 1 Ending Address PLBMTLEA1 contains the ending address of byte swapping region 1 This ending address identifies the ending of a byte swapping translation region with a...

Page 67: ...PLBMTLEA2 PLB Master Byte Swap Region 2 Ending Address PLBMTLEA2 contains the ending address of byte swapping region 2 This ending address identifies the ending of a byte swapping translation region...

Page 68: ...LEA3 PLB Master Byte Swap Region 3 Ending Address PLBMTLEA3 contains the ending address of byte swapping region 3 This ending address identifies the ending of a byte swapping translation region with a...

Page 69: ...a 16KB granularity Address Offset x38 Width 32 Reset Value x0000_0000 Access Read Write 3 16 14 PLBSNSEA0 PLB Slave No Snoop Region End Address PLBSNSEA0 identifies the ending address of the no snoopi...

Page 70: ...s available for test purposes only and allows error bits to be set A write access to x40 should provide a 32 bit mask where each 1 in the mask will clear the corresponding bit in the BESR A write acce...

Page 71: ...m memory When the WR_INT_EN bit of the PRIFOPT1 regis ter is set a PCI to memory access hit in this 16KB region will generate an interrupt pulse one cycle in duration to the CPC700 interrupt controlle...

Page 72: ...3 36 Processor Interface...

Page 73: ...bank starting and ending addresses and memory addressing mode are all programmable During reset Bank 0 defaults to ROM and is enabled while all other banks are disabled Bank 0 is typically used for th...

Page 74: ...the same system ECC checking may be disabled 4 2 Memory Controller Block Diagram A block diagram of the CPC700 memory controller is shown in Figure 8 Figure 8 Memory Controller Block Diagram Configur...

Page 75: ...oller Configuration Address Register MEMCFGDATA FF50_000C R W Memory Controller Configuration Data Register Table 22 Offsets for Memory Controller Registers Register Offset R W Description MCOPT1 20 R...

Page 76: ...cess if any is in progress A simple conceptual view of the priority associated with the routing of requests to the memory controller interface is shown in Figure 9 Figure 9 Routing of Memory Access Re...

Page 77: ...to system memory from the local processor or PCI which address the same page within a given memory bank are treated as page hits provided that the addressed bank is active when the pipelined access re...

Page 78: ...te Command SD_RTP Read to Pre charge Non Auto Precharge Mode The value programmed in this field should be determined empiri cally based upon the expected pattern of memory acceses If consecutive acces...

Page 79: ...Auto Pre charge Enable Auto Precharge enable When enabled all SDRAM Read Write accesses will be performed as Read w Auto Precharge or Write w Auto Precharge SD_CASL CAS_ Latency Programmable access la...

Page 80: ...f the SDRAM as follows ROW x COLUMN INTERNAL BANKS AP 1 if Auto Precharge is enabled AP 0 if Auto Precharge is disabled This bit field corresponds directly to SD_APGE from the SDTR1 configuration regi...

Page 81: ...A21 A22 A23 A24 A25 A26 A27 A28 Mode 2 12 x 9 4 13 x 9 2 BA 1 BA 0 MA 12 MA 11 MA 10 AP MA 9 MA 8 MA 7 MA 6 MA 5 MA 4 MA 3 MA 2 MA 1 MA 0 Row A7 A8 A7 A9 A10 A11 A12 A13 A14 A15 A16 A17 A18 A19 A20 C...

Page 82: ...11 MA 10 AP MA 9 MA 8 MA 7 MA 6 MA 5 MA 4 MA 3 MA 2 MA 1 MA 0 Row A6 A7 A8 A9 A10 A11 A12 A13 A14 A15 A16 A17 A18 A19 A20 Column A6 A7 A7 A4 AP A5 A21 A22 A23 A24 A25 A26 A27 A28 Mode 3 13 x 11 4 BA...

Page 83: ...5 A20 A21 A22 A23 A24 A25 A26 A27 A28 Mode 2 12 x 10 4 13 x 10 2 BA 1 BA 0 MA 12 MA 11 MA 10 AP MA 9 MA 8 MA 7 MA 6 MA 5 MA 4 MA 3 MA 2 MA 1 MA 0 Row A6 A7 A6 A8 A9 A10 A11 A12 A13 A14 A15 A16 A17 A18...

Page 84: ...s are generated internally when the refresh timer expires The Refresh interval is program mable via the RTR register in the Global Memory Timing Registers During refresh all SDRAM and ROM accesses are...

Page 85: ...t self refresh and wait a minimum of 12 clock cycles SD_SREX field of SDTR1 register before performing the access Once the SDRAM controller has exited self refresh mode it will not re enter self refre...

Page 86: ...ing timing diagrams are included to illustrate the SDRAM programmable timing parameters only Figure 10 Mode Register Write Command 00000 01 0 010 SD_CASL CLOCK CKE BA 1 0 MA 12 MA 11 7 MA 6 5 MA 4 MA...

Page 87: ...ge Figure 12 Write without Auto Precharge CLOCK CKE BA 1 0 MA 12 11 MA 10 AP MA 9 0 RAS_ SD_CS_ SD_RAS_ SD_CAS_ WE_ CAS_ SD_DQM DATA SD_RCD SD_RTP SD_CASL SD_PTA CLOCK CKE BA 1 0 MA 12 11 MA 10 AP MA...

Page 88: ...recharge CLOCK CKE BA 1 0 MA 12 11 MA 10 AP MA 9 0 RAS_ SD_CS_ SD_RAS_ SD_CAS_ WE_ CAS_ SD_DQM DATA SD_RCD SD_RTP SD_PTA SD_CASL Auto Precharge Begins CLOCK CKE BA 1 0 MA 12 11 MA 10 AP MA 9 0 RAS_ SD...

Page 89: ...Command Figure 16 CAS before RAS Refresh CLOCK CKE BA 1 0 MA 12 11 MA 10 AP MA 9 0 RAS_ SD_CS_ SD_RAS_ SD_CAS_ WE_ CAS_ SD_DQM SD_PTA CLOCK CKE BA 1 0 MA 12 0 RAS_ SD_CS_ 0 4 RAS_ SD_CS_ 1 5 RAS_ SD_C...

Page 90: ...18 Memory Controller Figure 17 Self Refresh Entry Exit CLOCK CKE BA 1 0 MA 12 11 MA 10 AP MA 9 0 RAS_ SD_CS_ SD_RAS_ SD_CAS_ WE_ CAS_ SD_DQM SD_PTA SD_PTA Precharge all if necessary Self Refresh Exit...

Page 91: ...CPC700 User s Manual Preliminary 4 19 4 5 9 2 CPU to Memory Timing Diagrams Figure 18 CPU Read Read 0 1 TS_ AACK_ DATA_ MA_ CS_ RAS_ RTRY_ CAS_ WE_ DQM DATA TA_ 2 3 4 5 6 7 0 1 2 3 4 5 6 7 U CLK...

Page 92: ...4 20 Memory Controller Figure 19 CPU Read Write 0 1 TS_ AACK_ DATA_ MA_ CS_ RAS_ ARTRY_ CAS_ WE_ DQM DATA TA_ 2 3 4 5 6 7 0 1 2 3 CPU CLK...

Page 93: ...CPC700 User s Manual Preliminary 4 21 Figure 20 CPU Write Read 0 1 TS_ AACK_ DATA_ MA_ CS_ RAS_ ARTRY_ CAS_ WE_ DQM DATA TA_ 2 3 4 5 6 7 4 5 6 7 CPU CLOCK...

Page 94: ...4 22 Memory Controller Figure 21 CPU Write Write 0 1 TS_ AACK_ DATA_ MA_ CS_ RAS_ ARTRY_ CAS_ WE_ DQM DATA TA_ 2 3 0 1 2 3 4 5 6 7 CPU CLOCK...

Page 95: ...DAck rd wr DBus PCI FRAME IRDY TRDY STOP AD 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 11 10 9 8 7 6 5 4 3 2 1 Sync Read laten...

Page 96: ...12 13 14 15 16 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Write post buffer full Write Snoop Pre snoop Pre snoop Snoop PLB_CLK PCI_CLK BG TS AACK TA req addrAck rd wr Burst rd wr DAck rd wr DBus FRAME IR...

Page 97: ...BG TS AACK TA req addrAck rd wr Burst rd wr DAck rd wr DBus FRAME IRDY TRDY STOP AD 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 11 10 9 8 7 6 5 4 3 2 1 Memory latenc...

Page 98: ...12 Read line Snoop Snoop PLB_CLK PCI_CLK BG TS AACK TA req addrAck rd wr Burst rd wr DAck rd wr DBus FRAME IRDY TRDY STOP AD 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 11 10 9 8 7 6 5 4 3 2 1 Write Delay...

Page 99: ...CPU Line Read PCI Burst Read 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 Line Read Snoop PLB_CLK PCI_CLK BG TS AACK TA req addrAck rd wr Burst rd wr DAck rd wr DBus FRAME IRDY TRDY STOP AD 14 13 12 11 10 9 8 7 6...

Page 100: ...ller Figure 27 CPU Line Read to PCI Write Burst 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 Write Snoop PLB_CLK PCI_CLK BG TS AACK TA req addrAck rd wr Burst rd wr DAck rd wr DBus FRAME IRDY TRDY STOP AD CPU PLB...

Page 101: ...Chip select signals are generated when the CPC700 detects accesses to addresses bracketed by the contents of a memory bank starting ending address register pair MBxSA MBxEA The comparison of address...

Page 102: ...equential single byte reads from the ROM device starting on the doubleword boundary and the entire assembled doubleword will be returned to the processor Care must be taken when attaching peripherals...

Page 103: ...dress 5 6 7 8 12 373 Latch 23 6 7 8 9 11 22 7 8 9 10 9 21 8 9 10 11 8 20 9 10 11 12 7 19 10 11 12 13 6 18 11 12 13 14 5 17 12 13 14 15 4 16 13 14 15 16 3 15 14 15 16 17 2 14 15 16 17 18 1 13 16 17 18...

Page 104: ...is shared with the DRAM SDRAM controller A complete list of registers affecting ROM operation follows Detailed descriptions of these registers can be found in Section 4 9 Memory Controller Register De...

Page 105: ...hment as this bit is also used as the Auto Precharge AP bit for SDRAM The CPC700 is inherently a Big Endian system ROM and peripherals which are typically specified as litttle endian should be connect...

Page 106: ...MA READ WRITE RNW CS OE WE W_DATA R_DATA 3 5 6 7 8 9 10 11 12 4 1 2 0 3 CSON 0 3 OEON 0 3 WEON OEON 0 3 1 TWT THDRD THDWR WEOFF Data Sampled On READS 0 1 Clock ALE MA READ WRITE RNW CS OE R_DATA 1 FW...

Page 107: ...CPC700 User s Manual Preliminary 4 35 Figure 31 Non Burst Read Figure 32 Single Write Synchronous Ready Enabled clock ALE MA READ WRITE RNW CS OE R_DATA clock ALE MA READ WRITE RNW CS WE W_DATA READY...

Page 108: ...ry Controller Figure 33 Single Write Asynchronous Ready Enabled Figure 34 Non Burst Read Synchronous Ready Enabled clock ALE MA READ WRITE RNW CS WE W_DATA READY clock ALE MA READ WRITE RNW CS OE R_DA...

Page 109: ...al Preliminary 4 37 Figure 35 Non Burst Read Synchronous Ready Enabled Figure 36 Burst Mode Read Asynchronous Ready Enabled clock ALE MA READ WRITE RNW CS OE R_DATA READY clock ALE MA READ WRITE RNW C...

Page 110: ...rd SEC DEC coverage The ECC module corrects all single bit errors and detects all double bit errors when reading from memory including the case where a single bit data and single bit address er ror oc...

Page 111: ...width due to the use of the single DQM in this situation Partial writes will result in read modify write cycles to the non ECC memory banks Systems which do not require ECC protection may configure th...

Page 112: ...ic bank is disabled the Correction Enable for that bank is a don t care This setting is used for ROM 1 1 0 ECC globally enabled If a specific bank is enabled for ECC and dis abled for correction check...

Page 113: ...t of ECC is as follows 1 immediately following reset the ECC logic is disabled by default 2 configure and enable the memory ROM controller using DCR cycles 3 write to system memory 4 read from memory...

Page 114: ...8 DH2 A 29 0 A 30 31 10 16 23 A 2 0 A 1 0 10 0100 23 16 DH3 A 29 0 A 30 31 11 24 31 A 2 0 A 1 0 11 1000 31 24 DL0 A 29 1 A 30 31 00 32 39 A 2 1 A 1 0 00 0001 7 0 DL1 A 29 1 A 30 31 01 40 47 A 2 1 A 1...

Page 115: ...med Note In the tables of register field descriptions throughout this specification some bits are shown shaded Those bits are reserved in the CPC700 Reading of reserved bits will produce unpredictable...

Page 116: ...this time the timing parameters for the respective controller should be configured Once enabled SDRAM will be initialized via the power on sequence and subsequently avail able for access 1 SLFREFEN 0...

Page 117: ...3 MEMTYPE Installed Memory Type Address Offset x28 Width 32 Reset Value x0000_0000 Access Read Write This register must be configured for each memory bank that is enabled Bit Name Reset Value Descript...

Page 118: ...0 Memory 00 ROM 01 DRAM 1x RESERVED These bits default to 00 to enable boot ROM in bank 0 2 3 MT_1 0 Bank 1 Memory 00 ROM 01 DRAM 1x RESERVED 4 5 MT_2 0 Bank 2 Memory 00 ROM 01 DRAM 1x RESERVED 6 7 M...

Page 119: ...egisters contain the starting addresses for banks 1 through 4 The minimum granularity for installed memory is 1M Byte 4 9 1 7 MBxEA Memory Bank 1 4 Ending Address Address Offset x5C 60 64 68 Width 32...

Page 120: ...rved Bit Name Reset Value Description 0 6 0s Reserved 7 8 SD_CASL 00 SDRAM CAS_ latency 00 2 CLK 01 3 CLK 1x Reserved This setting is used during the SDRAM Mode Set Command 9 SD_APGE 0 SDRAM Auto Prec...

Page 121: ...harge latency 0000 Reserved 0001 1111 Binary Decode 1 15 Clocks 18 21 SD_RTP 0111 SDRAM Read Command to Precharge Command minimum SDRAM Read with Auto Precharge Command to Auto Pre charge latency 0000...

Page 122: ...ss Read Write The 16 bit field of this register determines the memory refresh rate for SDRAM The internal counter runs at the processor bus frequency thus at 66 MHz 15ns cycle time a value of 0x03F8 1...

Page 123: ...ory Mapping for information on the var ious addressing modes available Bit Name Reset Value Description 0 1 DAM_0 0s Bank 0 Addressing mode 00 Mode 1 01 Mode 2 10 Mode 3 11 Mode 4 2 3 DAM_1 0s Bank 1...

Page 124: ...sfers The number of cycles from address valid to the deassertion of CS_ is 1 TWT NWT Next Wait Burst Mode Enabled BME 1 6 7 CSON 00 Chip Select On Timing Measured with respect to Address Valid 00 CS_...

Page 125: ...RE 0 Ready Enable 0 Device pacing via Ready input is Disabled 1 Device pacing via Ready input is Enabled 22 ARE 0 Asynchronous ready Enabled Ready Enabled RE 1 0 Ready input is synchronous Data Sample...

Page 126: ...00 8 bit 01 16 bit 10 32 bit 11 64 bit Reset value determined by strapping option See Section 6 4 Power on Reset Pin Strapping Options Strapping Pins Bit 0 TT 0 Processor bus Transfer Type Bit 1 TT 1...

Page 127: ...s read write capable A write attempted to a bank whose FLSHWEN bit is disabled will result in a memory select error Bit Name Reset Value Description 0 FLSHWEN_0 0 Bank 0 Flash write enable 0 Disable 1...

Page 128: ...dth 1 32 bit Width 5 7 0 Reserved 8 ECC_BANK0_EN 0 ECC Bank 0 Enable 0 Bank Disabled 1 Bank Enabled If ECC is globally enabled bit 1 1 these bits 8 16 control how the ECC controller will perform memor...

Page 129: ...n_Enable bit is set to zero When a CORRECTIONn_Enable bit is set to one ECC correction will be enabled When it is set to zero ECC will ignore the checkbits and pass the data along unmodified 17 ECC_BA...

Page 130: ...erate an interrupt to the processor based on this condition or not See Section Chapter 10 Interrupt Controller for more information Bit Name Reset Value Description 0 B0CE 0 Byte Lane 0 Corrected Erro...

Page 131: ...0 CE 0 Correctable Error 11 UE 0 Uncorrectable Error 12 AP 0 Address Parity Error 13 15 0 Reserved 16 BNK0ERR 0 Bank 0 Error 0 No Error 1 Error Occurred in Bank 0 17 BNK1ERR 0 Bank 1 Error 0 No Error...

Page 132: ...4 60 Memory Controller...

Page 133: ...ress spaces Single beat PCI I O reads and writes PCI memory single beat and prefetch burst reads and single beat writes Single beat PCI configuration reads and writes type 0 and type 1 PCI interrupt a...

Page 134: ...k diagram is shown in Figure 38 Figure 38 PCI Interface Macro Block Diagram PLB Slave PLB Master Reg Block CONFIG PCI Master I F PLB Slave I F Bus Bus W B R B PCI Target I F W B R B PLB Master I F Int...

Page 135: ...MM0PCILA FF40_0008 R W PMM 0 PCI Low Address PMM0PCIHA FF40_000C R W PMM 0 PCI High Address PMM1LA FF40_0010 R W PMM 1 Local Address PMM1MA FF40_0014 R W PMM 1 Mask Attribute PMM1PCILA FF40_0018 R W P...

Page 136: ...1 BAR PCIPTM2BAR 18 R W PTM 2 BAR Reserved 1C 27 Unused BARs Reserved 28 2B Unused Cardbus PCISUBSYSID 2C R W PCI Subsystem ID PCISUBSYSVENDID 2E R W PCI Subsystem Vendor ID Reserved 30 3B Unused or...

Page 137: ...pecial Cycle hFED0_0004 hFEDF_FFFF Reserved hFEE0_0000 hFF3F_FFFF Reserved PCI Macro does not respond hFF40_0000 hFF4F_FFFF PCI interface Local Configuration Registers hFF40_0000 PMM 0 Local Address h...

Page 138: ...ch PMM is also programmable and is a 64 bit address This allows address translation between the two busses The least significant word of the PCI address is defined in the PCI Low Address registers The...

Page 139: ...trolled by the registers PTM 2 Memory Size Attribute Local Config register PTM 2 Local Address Local Config register PTM 2 BAR PCI Config register 18 The location in PCI Memory space of each PTM is pr...

Page 140: ...interface generates PLB transactions based on the type and length of PCI transactions received The following sections describe the transaction types supported and outline the translation of commands...

Page 141: ...while there are PCI master writes posted a delayed read is initiated These posted writes are completed on the PLB bus before the read is run The PCI interface continues to accept post PCI master writ...

Page 142: ...don t cares for PCI reads The PCI interface performs word burst or single beat reads on the PLB regardless of the byte enables presented by the requesting PCI master Note this rule assumes that all P...

Page 143: ...will be at most 3 bytes because that is the maximum size possible for a PCI data phase with contiguous but not all active byte enables Example A PCI master device executes an 8 beat write The active...

Page 144: ...ingle beat write 1 4 byte2 PCI complete transaction post PLB request bus PLB_M x AddrAck of posted write request transfer data to PLB memory write sin gle beat single beat write 1 4 byte2 PCI complete...

Page 145: ...that decode to the CONFIG_DATA register Memory Read This command is generated in response to PLB 1 4 byte reads that decode to one of the three PMMs when the PMM is marked as non prefetchable Memory...

Page 146: ...e is rearbitrated When the PCI interface receives PLB 1 4 byte read requests that decode to a PMM marked as prefetch able the PCI interface burst reads up to 64 bytes from the PCI and saves the data i...

Page 147: ...es CPU to PCI Transactions Table 44 describes the PCI interface s response to PLB master requests The PCI terms retry and dis connect refer to respectively transaction abort with no data transferred a...

Page 148: ...ith Sl x _MErr write 1 4 byte memory I O PLB complete transaction post if buffer available PCI request bus retry or discon nect re request PCI bus write 1 4 byte memory I O PLB complete transaction po...

Page 149: ...at all 5 8 2 Completion Ordering The CPC700 implements the following completion ordering rules 1 PCI master writes are accepted if there is room in the PCI write post buffer 2 New PCI master reads are...

Page 150: ...ating frequencies through the use of strapping pins where pullup or pulldown resistors on certain CPC700 I O signals are read during system reset The strapping pins and the corresponding frequency mod...

Page 151: ...ccurs In asynchronous mode one wait state is added after about every fourth transfer as long as FIFO is not full thus maximum bandwidth is reduced about 20 Also disconnects occur more frequently PCI m...

Page 152: ...ed addresses in PLB space They must be accessed using single beat read or write cycles of the same size as shown in the register descriptions below Failure to access all bytes of a particular register...

Page 153: ...dress FF40_000Ch Width 32 bits Reset Value Undefined Table 47 PMM 0 Mask Attribute Register Bits Bit s Name Description 0 Enable This bit determines if range 0 is enabled to map PLB space to PCI Mem o...

Page 154: ...ce that is mapped to PCI Memory See PMM 0 Local Address for details 5 9 1 6 PMM 1 Mask Attribute PLB Address FF40_0014h Width 32 bits Reset Value 0000_0000 Access Read Write This register defines the...

Page 155: ...Reset Value 0000_0000 Access Read Write This register defines the size and attributes of range 2 in PLB space that is mapped to PCI Memory See PPMM 0 Mask Attribute for details 5 9 1 11 PMM 2 PCI Low...

Page 156: ...other least significant bits of the PLB address are passed through from the PCI address Only bits 31 12 are writable bits 11 0 are always zero 5 9 1 15 PTM 2 Memory Size Attribute PLB Address FF40_00...

Page 157: ...t addresses FEC0_0000 and FEC0_0004 instead of CF8h and CFCh and are named PCICFGADR and PCICFGDATA instead of CONFIG_ADDRESS and CONFIG_DATA PCICFGADR and PCICFGDATA should be accessed with single be...

Page 158: ...Bus Number is ZERO and the Device Number is greater than ZERO During the address phase of the configuration cycle AD11 is asserted if the Device Number is 1 AD12 is asserted if the Device Number is 2...

Page 159: ...the new value and writing the result NOTE All registers are represented in Little Endian notation i e the most significant byte corresponds to the highest address 5 9 3 1 PCI Vendor ID Register Addre...

Page 160: ...bles special palette snooping The CPC700 is not a VGA device therefore this bit is read only and returns 0 when read 6 Parity Error Response Parity error response This bit enables the detection of all...

Page 161: ...items therefore this bit is read only and returns 0 when read 7 Fast Back to Back Capable Indicates that the PCI target is capable of accepting fast back to back transactions when the transactions are...

Page 162: ...d Master Abort This bit is set whenever the CPC700 terminates a PCI cycle for which it is the master with master abort Writing a 1 to this bit resets it to 0 14 Signaled System Error Signaled system e...

Page 163: ...eturns 00h when read 5 9 3 8 PCI Latency Timer Address Offset 0Dh Width 8 Reset Value 07h Access Read Write The PCI latency timer register is an 8 bit read write register used to hold the value of the...

Page 164: ...ess Register 1 PCIPTM1BAR Address offset 14h Width 32 bits Reset Value 0000_0008h Access Read Write This register defines a space in PCI Memory space that is mapped to PLB space system memory or ROM F...

Page 165: ...ways ZERO 5 9 3 15 PCI Cardbus CIS Pointer Unused Address offset 28h 2Bh Unused and always ZERO 5 9 3 16 PCI Subsystem ID Register Address Offset 2Ch Width 16 Reset Value 00h Access Local Read Write P...

Page 166: ...offset 3Ch Width 8 Reset Value 00h Access Read The PCI interrupt line register is used to communicate interrupt line routing information The CPC700 does not implement an interrupt pin therefore this...

Page 167: ...ontrolled by the CPC700 The CPC700 is not a PCI to PCI bridge therefore this register is read only and returns 00h when read 5 9 3 24 PCI Subordinate Bus Number Address offset 41h Width 8 Reset Value...

Page 168: ...eans request 0 has the highest priority while request 5 has the lowest Bus parking modes and max transfer counts per grant can be pro grammed via the PCI Arbiter Control register Figure 42 Arbiter Pri...

Page 169: ...s bit enables the assertion of Sl x _MErr when the PCI interface is a PLB slave A value of 1 enables Sl x _MErr assertion A value of 0 disables Sl x _MErr assertion 3 MErr Detection Enable This bit en...

Page 170: ...PCI interface decodes the PCI interface allows such requests to timeout 1 PCI_SERR on Write Data Parity Error This bit is set when the CPC700 drives PCI_SERR PCI_PERR is also driven in response to a d...

Page 171: ...aster is zero PLB_lockerr is driven high to the PCI interface s PLB slave and an error associated with that master occurs the error will be reported and the MxFL field will be set Subsequent errors wi...

Page 172: ...ock 0 SESR Unlocked 1 SESR Locked 22 M1RWS Master 1 the PCI interface in the CPC700 Read Write Status 0 Error operation was a Write 1 Error operation was a Read 25 23 M1ET Master 1 the PCI interface i...

Page 173: ...SEAR1 Address offset 57h 54h Width 32 Reset Value 0000h Access Read The PLB Slave Error Address register 1 contains the address associated with an error on the PLB bus as indicated by the PLB slave a...

Page 174: ...itialize them before the Host sees them 1 Reserved When 1 this bit disables the PCI Target latency timer This pre vents the use of the Delayed Read mechanism 2 PCI Discard Timer Disable When 1 the CPC...

Page 175: ...done All errors are associated with either a cycle on the PLB bus or a cycle on the PCI bus Each error that can be detected has a mask associated with is If the mask is set then the detection of that...

Page 176: ...onously to the actual corresponding write data beat on the PLB For connected writes Sl x _MErr will be asserted with the data transfer and the data will be discarded If Master Abort Error Enable is cl...

Page 177: ...2 If a target abort is detected as an error register 49h bit 2 Error Status Register MErr Assertion Event bit is set to indicate an event which would cause Sl x _MErr to be asserted by the bridge PLB...

Page 178: ...f the state of the Parity Error Response bit The Parity Error Detected bit can be cleared by writing a 1 to it 2 If a data bus parity error is detected as an error register 49h bit 2 Error Status Regi...

Page 179: ...er PCI_SERR Asserted bit is set Setting of the PCI_SERR Asserted bit is non maskable It can be reset by writing a 1 to it 3 If the CPC700 PCI target asserts PCI_SERR register 49h bit 4 Error Status Re...

Page 180: ...nding as a PCI memory target is allowed 5 11 1 2 Example Address Map Setup Figure 43 shows the desired address map System memory resides from 0 to 0FFF_FFFFh in the CPU PLB address space It is accessi...

Page 181: ...9 Figure 43 Example Address Map ROM Memory CPU PLB PCI Memory Space PMM1 PMM0 PTM1 BAR1 Prefetchable PCI Targets Non Prefetchable PCI Targets 8C00_0000 8800_0000 8000_0000 1000_0000 9400_0000 9000_000...

Page 182: ...Error Enable register must be initialized appropriately The PCI arbiter defaults are enabled Arbiter options are programmable via the PCI Arbiter Control reg ister If an external arbiter is used the...

Page 183: ...the following registers if the default value is not suitable before setting the Host Config Enable bit The address map see Section 5 11 1 1 Address Map Initialization PCI Vendor ID PCI Device ID PCI...

Page 184: ...5 52 PCI Interface...

Page 185: ...HRESET logic The CPC700 internal latches will be reset at the same time as if a System Reset had occurred with the exception that the PLL tuning bits will retain the values just written to them Drivi...

Page 186: ...events at power on are as follows 1 System activates SYS_RESET_N active low to the CPC700 2 CPR holds reset active to the two internal PLLs for the entire time that SYS_RESET_N is active This ensures...

Page 187: ...ower supply supervisor power on reset etc drive an active low signal into the SYS_RESET_N input of the CPC700 The CPC700 activates the RESET_OUT_N signal from the asser tion of SYS_RESET_N until 500 s...

Page 188: ...now one of the sources driving HRESET to the CPU 6 3 2 Internal Peripheral Reset Control In addition to being reset with the system reset SYS_RESET_N the individual internal peripherals may each be r...

Page 189: ...Enable PLL pulldown Bypass PLL pullup Shared DQM ECC Enable DQM 1 7 pullup Enable ECC 1 7 pulldown Table 63 PCI Frequency Modes CPC700 I O Clocking Mode PCI Frequency Range TSIZ 1 TSIZ 2 PCI_66_STR AP...

Page 190: ...UART IIC and GPT internal peripherals Note that setting a peripheral s reset bit in the CPRRESET register will hold the peripheral in a reset state until its reset bit is cleared written to a logic 0...

Page 191: ...ered When enabled in the CPC700 s interrupt controller these events can be used to interrupt the processor Table 65 Peripheral Reset Control Register Bit Name Default Description 0 UART0_RST 0 UART 0...

Page 192: ...SET_OUT_N See Section 6 1 1 PLL Tuning for important information regarding this register Note If changes from the default values are required contact your IBM representative for proper values for this...

Page 193: ...Asynchronous PCI Mode 0 PCI Frequency 50MHz 1 PCI Frequency 50MHz In Synchronous PCI Mode This bit is a Don t Care 1 PCIFREQ1 Pin PCI_66_STRAP 0 PCI Frequency Select 1 0 PCI Frequency 25 35MHz 1 PCI F...

Page 194: ...6 10 Clock Power Management and Reset...

Page 195: ...nterrupt This UART is functionally identical to NS16550 in character mode on power up it will be in this mode and can be put into FIFO mode to relieve the processor of excessive software overhead Here...

Page 196: ...dently controlled transmit receive line status and data set interrupts Programmable baud rate generator divides the UART serial clock input by 1 to 216 1 and generates the 16x clock Baud rate bits s C...

Page 197: ...Register UARTxFCR FF60_0X02 W UART x FIFO Control Register UARTxLCR FF60_0X03 R W UART x Line Control Register UARTxMCR FF60_0X04 R W reserved UARTxLSR FF60_0X05 R W UART x Line Status Register UARTx...

Page 198: ...valid bit of the MCR in this two wire implementation of the UART is MCR bit 4 the Loopback Mode bit which can be used for diagnostic purposes Note Register bit definitions are shown in big endian not...

Page 199: ...Even Parity Select Bit When bit 3 is a logic 1 an odd number of logic 1 s is transmitted or checked in the data word and the parity bits 1 Even Parity Select Bit When bit 4 is a logic 1 an even numbe...

Page 200: ...CPC700 interrupt controller This bit is set to logic 1 when a character is transferred from the THR to the transmitter shift register In FIFO mode this bit is set when the transmitter FIFO is empty 3...

Page 201: ...receiver FIFO or the receiver buffer register 1 Receiver data ready DR indicator An entire incoming character has been received into the RBR or receiver FIFO Table 74 FIFO Control Register Descriptio...

Page 202: ...e 1 that is written into this position is self clearing 1 Receiver FIFO reset A logic 1 written here will clear all bytes in the receiver FIFO and reset all of its counter logic to 0 The receiver shif...

Page 203: ...evel Interrupt Type Interrupt Source Interrupt Reset Control 0 1 1 1st Receiver Line Status Overrun Parity or Framing Error or Break Interrupt Read LSR 0 1 0 2nd Received Data Available Receiver data...

Page 204: ...9600 54 rounded 0x36 For this example the Divisor Latch MSB register should be programmed to 0 and Divisor Latch LSB regis ter should be programmed to 0x36 Due to the error introduced by rounding some...

Page 205: ...FIFO timeout will occur when At least one character is in the receiver FIFO no serial characters have been received for four serial character time periods and the processor has not read the FIFO for f...

Page 206: ...nd or transmitter Bits 3 6 of the LSR specifies which errors if any have occurred Character status errors are handled in the same way as in interrupt mode Since bit 5 of the IER 0 the IIR is not affec...

Page 207: ...ced features of the Philips Semiconductors I2 C Specification 100 and 400 kHz operation 8 bit data transfers 7 bit and 10 bit address decode generation Slave transmitter and receiver Master transmitte...

Page 208: ...C interface is performing a read operation Table 78 IIC Registers Facility Name Mnemonic CPC700 Map Addres s hex Type Affected by Reset Size bits Master Data Buffer IICxMDBUF FF6X_0000 0x0 R W Yes cle...

Page 209: ...he interrupt mask register is used to control which interrupts can be issued The transfer count register is used to indicate the number of bytes actually transferred across the IIC bus in a master or...

Page 210: ...r on the IIC bus This allows the overlapping of slave and master transfer operations The bit assignments for the master data buffer and the slave data buffer are identical Care must be taken not to st...

Page 211: ...ompleted The remaining bits are left unaffected Count bits 0 1 bits 2 3 of the Control Register are defined as follows 0x0 Transfer one byte 0x1 Transfer two bytes 0x2 Transfer three bytes 0x3 Transfe...

Page 212: ...bus bit 5 Chain When set to a logic 1 the requested master transfer is one in a sequence of transfers Completion of the requested transfer only indicates that this piece of the transfer is complete T...

Page 213: ...f the read operation or that the slave data buffer has gone empty during the read operation How the IIC interface handles not ready conditions can potentially affect system performance A slave that ho...

Page 214: ...he third system clock after the transfer For byte accesses the status will be readable on the second system clock after the transfer Bits 0 2 3 5 and 7 are read only bit 6 Exit unknown IIC bus state W...

Page 215: ...re The pending and on deck interrupts along with the active interrupt in the status register form a miniature FIFO for storing the interrupts A new interrupt is first set into the pending state It wil...

Page 216: ...ted This bit might also be momentarily set while a new interrupting condition moves from the on deck to the active state When IRQ active is set to a logic 0 an on deck IRQ will cause IRQ active to be...

Page 217: ...IIC bus Since the base clock is used as the basis for all setup and hold timings on the IIC bus it is imperative that the correct value is used If the wrong value is used the IIC interface will violat...

Page 218: ...is received during a read the slave read complete bit bit 0 of the extended control and slave status register is also set to a logic 1 bit 1 Enable IRQ on slave read needs service The interrupt is act...

Page 219: ...equent to setting bit 7 to a logic 0 a minimum of eight system clock periods must occur before any other registers in the IIC interface are programmed Care must be used when changing the setting of bi...

Page 220: ...n the IIC bus is being held busy until slave read needs service is cleared to a logic 0 Also in this first case if enable hold SCL is set to a logic 0 then a not acknowledge is sent to end the current...

Page 221: ...becomes the on deck interrupt Any status associated with one of the multiple interrupts is immediately set into its corresponding register Thus it is possible for an interrupt service routine to see t...

Page 222: ...to send one byte of data out over the IIC interface One of the first things that should be done by the program is to write the byte that is to be sent into the buffer If the program wanted to check th...

Page 223: ...t must be avoided are those which are listed in the Phillips Semiconductors I2 C Specification dated 1995 Section 7 2 For your convenience the section is summarized as fol lows If multiple masters can...

Page 224: ...8 18 IIC...

Page 225: ...d via load store instructions using the addresses shown in Table 96 Table 96 GPT Registers Base Address Register Register Name Access Mode Width bits FF65_0000 GPTTBC GPT Time Base Counter R W 32 FF65...

Page 226: ...t its maximum value all bits set to 1 it will roll back to zero upon the next clock The TBC may be read and written by software using its memory mapped address The TBC is synchronously reset to zero u...

Page 227: ...he CPC700 The bits in the CPRCAPTEVNT register can be made falling edge active set to 0 to trigger or rising edge active set to 1 to trigger via the GPT Edge Detection Control GPTEC register Refer to...

Page 228: ...d when all bits either com pare or are masked the GPT Interrupt Status GPTIS Register bit is set indicating a valid comparison Further if the corresponding GPT Interrupt Enable GPTIE Register bit is s...

Page 229: ...with the GPT_RST bit in the CPRRESET register To save on power consumption only those registers required to bring the GPT to a stable state are reset with GPT_RST Other registers should be programmed...

Page 230: ...tware to use as a general timer All TBC bits reset to zero 0 9 3 2 GPT Capture Enable GPTCE Register Figure 50 Capture Timers Enable Register Bits 0 4 map to the corresponding capture timer and bits 5...

Page 231: ...nt signal as defined in the CPR CAPTEVNT register see Figure 52 Bits 5 31 are reserved When zero 0 the non synchronized path is selected and when one 1 the synchronized path is selected Using the sync...

Page 232: ...us and the lower half bits 16 20 correspond to the compare timer interrupt status see Figure 54 GPTIS status bits for the capture timers are set when a capture event occurs the capture timer is enable...

Page 233: ...re Timer Register captures the value of the TBC whenever its corresponding capture event is triggered and its capture timer is enabled The width of each Capture Timer Register is 32 bits All Capture T...

Page 234: ...ure Event Generation Register This register is provided to signal events that will cause the capture timers to trigger System software may set and reset these bits as desired to time certain system ev...

Page 235: ...ocal memory range interrupt ECC correctable error interrupt Interrupts are individually maskable Interrupts can be individually programmed to generate a machine check exception MCP or an exter nal int...

Page 236: ...es were placed in sequential memory locations allowing 512 0x200 bytes for each then with the proper base address the vector generated by the UIC could point directly to the interrupt service routine...

Page 237: ...considered the highest priority From whatever end of the Status reg ister that is considered highest priority the next bit is the next in priority and so on to the lowest priority at the opposite end...

Page 238: ...r an external interrupt to the processor MCP pro grammed interrupts when properly enabled and when the MCP enable bit bit 1 of the PRIFOPT1 register is set will drive the CPC700 s MCP_N output signal...

Page 239: ...on 10 5 2 UICSRS UIC Status Register Set Figure 57 UICSRS UIC Status Register Set Register Address R W Description UICSR FF50_0880 R C UIC Status Register Read Clear UICSRS FF50_0884 R S UIC Status Re...

Page 240: ...UICCR UIC Critical Register Figure 59 UICCR UIC Critical Interrupt Register The bits of the UICCR correspond one to one with the bits of the UICSR Each bit in the UICCR is used to determine whether an...

Page 241: ...on how to program the edge level trigger register for the CPC700 10 5 6 UICTR UIC Trigger Register Figure 61 UICTR UIC Trigger Register The bits in the UICTR will be used to program the interrupt inpu...

Page 242: ...pt handler routines associated with each interrupt The vector base address set in the UICVCR is used when calculating the interrupt vector The two least significant bits of this address are always ass...

Page 243: ...ken When using this method the interrupt service routines should be placed 512 0x200 bytes apart The interrupt vector is generated for the highest priority interrupt which is currently enabled active...

Page 244: ...10 10 Interrupt Controller...

Page 245: ...ell as for the support of board level testing and debug The following JTAG commands are supported by the CPC700 JTAG TAP controller 1 EXTEST 2 SAMPLE PRELOAD 3 BYPASS 4 CLAMP 5 IDCODE 6 USERCODE The C...

Page 246: ...I 11 2 JTAG...

Page 247: ...PLB priority level and thus its priority level cannot be changed The default PLB priority level of the PCI PLB Master is also the highest but it can be changed by software A register associated with...

Page 248: ...master Once locked the PEAR cannot be updated if a subsequent error occurs until all PESR FLCKn fields are cleared n is the master ID Table 102 PLB Arbiter Registers Mnemonic Register Name Address Ac...

Page 249: ...he 60x PLB processor interface 1 R W0 Master 0 Read Write Status 0 Master 0 error operation was a write 1 Master 0 ICU error operation was a read 2 FLK0 Master 0 PESR Field Lock 0 Master 0 PESR field...

Page 250: ...12 4 Processor Local Bus PLB...

Page 251: ...GESR GESR fields can be locked using the GESR FLKn and GESR ALKn fields n is the master ID Once locked the GESR fields associated with a master cannot be overwritten if a subsequent error occurs until...

Page 252: ...s locked 5 6 PTE1 PLB Timeout Error Status Master 1 00 No master 1 error occurred 01 Master 1 timeout error occurred 10 Master 1 slave error occurred 11 Reserved Master 1 is the PCI interface 7 R W1 R...

Page 253: ...16 Processor Interface Register Description for detailed register information Table 102 Processor Interface Register Addressing Register Address R W Description PIFCFGADR FF50_0000 R W Processor Inte...

Page 254: ...ite Interrupt Region Base Address Table 104 Memory Controller Register Addressing Register Address R W Description MEMCFGADR FF50_0008 R W Memory Controller Configuration Address Register MEMCFGDATA F...

Page 255: ...4 R W ROM Peripheral Bank 1 Parameters RPB2P E8 R W ROM Peripheral Bank 2 Parameters RPB3P EC R W ROM Peripheral Bank 3 Parameters RPB4P F0 R W ROM Peripheral Bank 4 Parameters Table 106 PCI Interface...

Page 256: ...FEC0_0004 R W PCI Configuration Data Register Table 107 PCI Configuration Register Offsets PCI Config Register Offset R W Description PCIVENDID 01 00 R W Vendor ID PCIDEVID 03 02 R Device ID PCICMD 0...

Page 257: ...1 60 R W Bridge Options 2 Table 108 Clock Power Management and Reset Control Registers Register Address R W Description CPRPMCTRL FF50_0900 R W Peripheral Power Management Control CPRRESET FF50_0904 R...

Page 258: ...egister Address R W Description UICSR FF50_0880 R C UIC Status Register Read Clear UICSRS FF50_0884 R S UIC Status Register Set UICER FF50_0888 R W UIC Enable Register UICCR FF50_088C R W UIC Critical...

Page 259: ...gister Address R W Description IIC1MDBUF FF63_0000 R W IIC1 Master Data Buffer Reserved FF63_0001 IIC1SDBUF FF63_0002 R W IIC1 Slave Data Buffer Reserved FF63_0003 IIC1LMADR FF63_0004 R W IIC1 Low Mas...

Page 260: ...Register UART0LSR FF60_0305 R W UART 0 Line Status Register UART0MSR FF60_0306 R W UART 0 Modem Status Register UART0SCR FF60_0307 R W UART 0 Scratch Register UART0DLL FF60_0300 R W UART 0 Divisor Lat...

Page 261: ...PTIS FF65_0020 R Timers Interrupt Status Clear upon Read GPTIE FF65_0024 R W Timers Interrupt Enable Reserved 28 3C GPTCAPT0 FF65_0040 R Capture Timer 0 GPTCAPT1 FF65_0044 R Capture Timer 1 GPTCAPT2 F...

Page 262: ...14 10 Register Summary...

Page 263: ...7 TBST_N R19 I O LVTTL 11 7 3 3 TSIZ0 P16 I O LVTTL 11 7 pd 13K 3 3 TSIZ1 N13 I O LVTTL 11 7 pd 13K 3 3 TSIZ2 N11 I O LVTTL 11 7 pu 20K 3 3 TS_N P14 I O LVTTL 11 7 3 3 TT0 R15 I O LVTTL 11 7 pd 13K 3...

Page 264: ...O PCI note 1 note 1 PCI_SERR_N M06 I O PCI note 1 note 1 5 0 PCI_STOP_N T04 I O PCI note 1 note 1 5 0 PCI_TRDY_N P06 I O PCI note 1 note 1 5 0 ROM_ALE H14 O LVTTL 11 7 ROM_OE_N K12 O LVTTL 12 18 ROM_...

Page 265: ...tatus register 7 6 M Memory Access Arbiter 4 4 Memory Controller 4 1 Memory Interface Singals 2 5 O Overview 1 1 P PACR 12 2 Page Mode Access 4 5 parallel to serial conversion 1 8 7 1 PCI Bus Interfac...

Page 266: ...al interface characteristic 7 2 serial to parallel conversion 1 8 7 1 Signal Descriptions 2 1 Snoop Cycles 3 12 SPCTL 9 6 SPHS 9 6 SPLS 9 9 SPRB 9 9 SPRC 9 7 10 5 10 6 10 7 10 8 10 9 SPTB 9 7 System I...

Page 267: ...CPC700 User s Manual Preliminary...

Page 268: ...tion contained herein Nothing in this document shall operate as an express or implied license or indemnity under the intellectual property rights of IBM or third parties The products described in this...

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