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DS80C400 Network Microcontroller

71 of 96

TINI400 ROM Initialization Code

The TINI400 firmware automatically executes Initialization Code (ROM_Init) to generate the memory map as
shown in

Figure 13

and configure the DS80C400 hardware as follows:

Enables 24-bit contiguous address mode

(ACON.1:0 = 11b)

Logically relocates ROM to addresses FF0000h–FF7FFFh

(ACON.5 =1)

Enables

CE0–3,

2MB/chip

enable (P4CNT

2Fh)

Enables

PCE0–3 (P5CNT

07h)

Enables CE4–7, 1M/peripheral chip enable

(P6CNT = 27h)

Merged program/data CE0–3, relocate internal XRAM

(MCON = AFh)

Enables

extended

1kB

stack

option

(ACON.2

Configure to maximum MOVX stretch value

(CKCON.2:0 = 111b)

Configure UARTs for Mode 1 serial operation

Figure 13. Memory Map Following Execution of ROM_Init

00FFFFh

800000h -

A00000h -

C00000h -

E00000h -

FFFFFFh -

600000h -

400000h -

200000h -

000000h -

INTERNAL MEMORY

program data

EXTERNAL MEMORY

merged program/data space

CE7

CE6

CE5

CE4

CE3

CE2

CE1

CE0

DATA INACCESSIBLE

64kB SRAM REQUIRED

PROGRAM
INACCESSIBLE

ROM

CAN/BCU XRAM

FF0000h

FFDB00h

Содержание DS80C400

Страница 1: ...Terminals ORDERING INFORMATION PART TEMP RANGE MAX CLOCK SPEED PIN PACKAGE DS80C400 FNY 40 C to 85 C 75MHz 100 LQFP 1 Wire is a registered trademark of Dallas Semiconductor Magic Packet is a trademar...

Страница 2: ...for XTAL1 RST OW VIL2 1 0 V Input High Level VIH1 2 0 V Input High Level for XTAL1 RST OW VIH2 2 4 V Output Low Current for Port 1 3 7 at VOL 0 4V IOL1 6 10 mA Output Low Current for Port 0 2 TX_EN T...

Страница 3: ...um at approximately 2V Note 12 During external addressing mode weak latches are used to maintain the previously driven state on the pin until such time that the Port 0 pin is driven by an external mem...

Страница 4: ...or is used in conjunction with the default system clock selection CD1 CD0 10b the minimum maximum system clock high tCHCL and system clock low tCLCH periods are directly related to clock oscillator du...

Страница 5: ...RD or PSEN or WR High to ALE tWHLH 5tCLCL 3 5tCLCL 4 ns 4 CST 7 tCHCL 5 tCHCL 13 CST 0 tCLCL tCHCL 5 tCLCL tCHCL 13 1 CST 3 RD or PSEN or WR High to Port 4 CE or Port 5 PCE High tWHLH2 5tCLCL tCHCL 5...

Страница 6: ...DS80C400 Network Microcontroller 6 of 96...

Страница 7: ...DS80C400 Network Microcontroller 7 of 96...

Страница 8: ...6 MULTIPLEXED 2 CYCLE DATA MEMORY PCE0 3 READ MULTIPLEXED 2 CYCLE DATA MEMORY CE0 7 READ PORT 4 3 CE0 PORT 4 6 ADDRESS PORT 6 7 CE4 A16 A21 A16 A21 A16 A21 A16 A21 PORT 4 3 CE0 PORT 6 7 CE4 PORT 4 6 A...

Страница 9: ...TIPLEXED 2 CYCLE DATA MEMORY CE0 7 WRITE MULTIPLEXED 3 CYCLE DATA MEMORY PCE0 3 READ OR WRITE PORT 4 3 CE0 PORT 6 7 CE4 PORT 4 6 ADDRESS A16 A21 A16 A21 A16 A21 A16 A21 PORT 4 3 CE0 PORT 6 7 CE4 PORT...

Страница 10: ...96 MULTIPLEXED 3 CYCLE DATA MEMORY CE0 7 READ MULTIPLEXED 3 CYCLE DATA MEMORY CE0 7 WRITE PORT 4 3 CE0 PORT 6 7 CE4 PORT 4 6 ADDRESS A16 A21 A16 A21 A16 A21 A16 A21 PORT 4 3 CE0 PORT 6 7 CE4 PORT 4 6...

Страница 11: ...LTIPLEXED 9 CYCLE DATA MEMORY PCE0 3 READ OR WRITE MULTIPLEXED 9 CYCLE DATA MEMORY CE0 7 READ PORT 4 3 CE0 PORT 6 7 CE4 PORT 4 6 ADDRESS A16 A21 A16 A21 A16 A21 A16 A21 PORT 4 3 CE0 PORT 6 7 CE4 PORT...

Страница 12: ...DS80C400 Network Microcontroller 12 of 96 MULTIPLEXED 9 CYCLE DATA MEMORY CE0 7 WRITE PORT 4 3 CE0 PORT 6 7 CE4 PORT 4 6 ADDRESS A16 A21 A16 A21 A16 A21 A16 A21...

Страница 13: ...LCH 19 ns Note 1 Specifications to 40 C are guaranteed by design and not production tested Note 2 All parameters apply to both commercial and industrial temperature operation unless otherwise noted No...

Страница 14: ...or PSEN or WR Low tAVWL1 10tCLCL 5 ns 4 CST 7 tCLCL tCLCH 5 CST 0 2tCLCL tCLCH 5 1 CST 3 Port 2 4 6 Address Port 4 CE or Port 5 PCE to RD or PSEN or WR Low tAVWL2 10tCLCL tCLCH 5 ns 4 CST 7 Data Vali...

Страница 15: ...DS80C400 Network Microcontroller 15 of 96...

Страница 16: ...DS80C400 Network Microcontroller 16 of 96 l...

Страница 17: ...PLEXED 2 CYCLE DATA MEMORY PCE0 3 READ OR WRITE NONMULTIPLEXED 2 CYCLE DATA MEMORY CE0 7 READ PORT 4 3 CE0 PORT 6 7 CE4 PORT 4 6 ADDRESS A16 A21 A16 A21 A16 A21 A16 A21 PORT 4 3 CE0 PORT 6 7 CE4 PORT...

Страница 18: ...ED 2 CYCLE DATA MEMORY CE0 7 WRITE NONMULTIPLEXED 3 CYCLE DATA MEMORY PCE0 3 READ OR WRITE PORT 4 3 CE0 PORT 6 7 CE4 PORT 4 6 ADDRESS A16 A21 A16 A21 A16 A21 A16 A21 PORT 7 PORT 4 3 CE0 PORT 6 7 CE4 P...

Страница 19: ...IPLEXED 3 CYCLE DATA MEMORY CE0 7 READ NONMULTIPLEXED 3 CYCLE DATA MEMORY CE0 7 WRITE PORT 4 3 CE0 PORT 6 7 CE4 PORT 4 6 ADDRESS A16 A21 A16 A21 A16 A21 A16 A21 PORT 7 PORT 4 3 CE0 PORT 6 7 CE4 PORT 4...

Страница 20: ...ED 9 CYCLE DATA MEMORY PCE0 3 READ OR WRITE NONMULTIPLEXED 9 CYCLE DATA MEMORY CE0 7 READ PORT 4 3 CE0 PORT 6 7 CE4 PORT 4 6 ADDRESS A16 A21 A16 A21 A16 A21 A16 A21 PORT 7 PORT 4 3 CE0 PORT 6 7 CE4 PO...

Страница 21: ...t tSLOT 68 8 86 12 15 68 8 86 ms Low Time for Write 1 tLOW1 4 8 6 0 8 1 7 2 9 ms Low Time for Write 0 tLOW0 62 4 78 8 10 62 4 78 ms Write Data Sampling Time tWDV 15 60 2 6 25 60 ms Read Data Sampling...

Страница 22: ...DS80C400 Network Microcontroller 22 of 96 OW PIN TIMING...

Страница 23: ...nd receiving bits within a byte The difference comes when the last bit of the byte has been completely sent At this point the signal is either enabled continuously until the next reset or time slot be...

Страница 24: ...D TX_EN Data Setup to TXClk tTSU 10 25 ns TXD TX_EN Data Hold from TXClk tTHD 2 2 ns RXClk Pulse Width tRDC 14 26 140 260 ns RXClk to RXD RX_DV RX_ER Valid tRDV 10 30 190 210 ns MDC Period tMCLCL 400...

Страница 25: ...ycle 10 tCLCL 10 Output Data Setup to Clock Rising tQVXH SM2 1 4 clocks per cycle 3 tCLCL 10 ns SM2 0 12 clocks per cycle 2 tCLCL 10 Output Data Hold from Clock Rising tXHQX SM2 1 4 clocks per cycle t...

Страница 26: ...DS80C400 Network Microcontroller 26 of 96 SERIAL PORT 0 SYNCHRONOUS MODE TRADITIONAL 8051 OPERATION TXD CLOCK XTAL 12 SM2 0 HIGH SPEED OPERATION TXD CLK SYSCLK 4 SM2 1...

Страница 27: ...536 tCLCK Note 1 Startup time for crystals varies with load capacitance and manufacturer Time shown is for an 11 0592MHz crystal manufactured by Fox Electronics Note 2 Reset delay is a synchronous cou...

Страница 28: ...0 CONTROLLER CAN SRAM 256 x 8 BUFFER CONTROL UNIT ACCUMULATOR PORT LATCH PORT 4 OSCILLATOR PORT 2 PORT LATCH PORT 0 1 WIRE CONTROLLER PORT LATCH SRAM 9kk x 8 V CC POWER MONITOR RESET CONTROL OSCILLAT...

Страница 29: ...rystal amplifier 86 AD0 D0 85 AD1 D1 84 AD2 D2 83 AD3 D3 82 AD4 D4 81 AD5 D5 80 AD6 D6 79 AD7 D7 AD0 7 Port 0 I O When the MUX pin is connected low Port 0 is the multiplexed address data bus While ALE...

Страница 30: ...n driver followed by a weaker sustaining pullup Once the momentary strong driver turns off the port once again becomes the output and input high state Port Alternate Function P4 0 CE0 Program Memory C...

Страница 31: ...ion of frames 10 RXClk Receive Clock Input The receive clock is a continuous clock sourced from the Ethernet PHY controller It is used to provide timing reference for transferring of RX_DV RX_ER and R...

Страница 32: ...6 network stack and OS are provided in ROM The network stack supports up to 32 simultaneous TCP connections and can transfer up to 5Mbps through the Ethernet MAC Its maximum system clock frequency of...

Страница 33: ...the ability to place the CPU into an idle state or an ultra low power stop mode state As protection against brownout and power fail conditions the microcontroller is capable of issuing an early warni...

Страница 34: ...0 a machine cycle requires only 4 clocks Thus the fastest instruction 1 machine cycle in duration executes three times faster for the same crystal frequency The majority of instructions on the DS80C40...

Страница 35: ...7 A15 P2 6 A14 P2 5 A13 P2 4 A12 P2 3 A11 P2 2 A10 P2 1 A9 P2 0 A8 A0h P5 P5 7 PCE3 P5 6 PCE2 P5 5 PCE1 P5 4 PCE0 P5 3 P5 2 T3 P5 1 C0RX P5 0 C0TX A1h P5CNT CAN0BA C0_I O P5CNT 2 P5CNT 1 P5CNT 0 A2h...

Страница 36: ...4X 2X ALEOFF C4h STATUS PIP HIP LIP SPTA1 SPRA1 SPTA0 SPRA0 C5h MCON IDM1 IDM0 CMA PDCE3 PDCE2 PDCE1 PDCE0 C6h TA C7h T2CON TF2 EXF2 RCLK TCLK EXEN2 TR2 C T2 CP RL2 C8h T2MOD D13T1 D13T2 T2OE DCEN C9h...

Страница 37: ...ID3 ID2 F6h STATUS1 V1PF V3PF SPTA2 SPRA2 F7h EIP EPMIP C0IP EAIP PWDI PWPI PS2 PT3 PX2 5 F8h P7 P7 7 A7 P7 6 A6 P7 5 A5 P7 4 A4 P7 3 A3 P7 2 A2 P7 1 A1 P7 0 A0 F9h TL3 FBh TH3 FCh T3CM TF3 TR3 T3M S...

Страница 38: ...0 0 0 9Ch ACON 1 1 0 0 Special 0 0 0 9Dh C0TMA0 0 0 0 0 0 0 0 0 9Eh C0TMA1 0 0 0 0 0 0 0 0 9Fh P2 1 1 1 1 1 1 1 1 A0h P5 1 1 1 1 1 1 1 1 A1h P5CNT 1 0 0 0 0 0 0 0 A2h C0C 0 0 0 0 1 0 0 1 A3h C0S 0 0 0...

Страница 39: ...0 0 DBh BPA3 0 0 0 0 0 0 0 0 DCh ACC 0 0 0 0 0 0 0 0 E0h OCAD 0 0 0 0 0 0 0 0 E1h CSRD 0 0 0 0 0 0 0 0 E3h CSRA 0 0 0 0 0 0 0 0 E4h EBS 0 1 1 0 0 0 0 0 E5h BCUD 0 0 0 0 0 0 0 0 E6h BCUC 0 0 0 0 0 0 0...

Страница 40: ...ation Bits MCON 5 CAN CMA Data Memory Assignment MCON 3 0 PDCE3 PDCE0 Program Data Chip Enables COR CEh COR 7 IRDACK IRDA Clock Output Enable COR 4 3 C0BPR7 C0BPR6 CAN 0 Baud Rate Prescale Bits COR 2...

Страница 41: ...hing instructions automatically save and restore the entire program counter The 24 bit branching instructions such as ACALL AJMP LCALL LJMP MOV DPTR RET and RETI instructions require an assembler comp...

Страница 42: ...A2h and Port 6 control register P6CNT B2h designate the number of peripheral chip enables and the maximum amount of addressable data memory per peripheral chip enable Table 5 shows which port pins ar...

Страница 43: ...y space are disabled Write access to combined program and data memory blocks is controlled by the WR signal and read access is controlled by the PSEN signal This feature is especially useful if the de...

Страница 44: ...n data pointer related instructions toggle the active data pointer selection to the other pointer in the pair Enabling the auto toggle feature with one pointer to source data and a second pointer to d...

Страница 45: ...he active data pointer after certain DPTR based instructions are executed This feature can greatly reduce the software overhead associated with data memory block moves which toggle between the source...

Страница 46: ...ng accessed The default of one stretch cycle allows the use of commonly available SRAMs without dramatically lengthening the memory access times Stretch cycle settings affect external MOVX timing in t...

Страница 47: ...ory accesses do not generate WR or RD strobes The DS80C400 contains an additional 256 Bytes of internal SRAM that is used to configure and operate the 15 CAN controller message centers The address loc...

Страница 48: ...MULTIPLY 16 x 16 Load MA with dividend LSB Load MA with dividend LSB 1 Load MA with dividend LSB 2 Load MA with dividend MSB Load MB with divisor LSB Load MB with divisor MSB Poll the MST bit until cl...

Страница 49: ...le before attempting a transmission Having multiple stations on the network results in the possibility of transmissions from different stations colliding When a collision is detected the MAC waits som...

Страница 50: ...TER ADDRESS CSRA FUNCTION 00h MAC Control 04h Ethernet MAC Physical Address 47 32 08h Ethernet MAC Physical Address 31 0 0Ch Multicast Address Hash Table 63 32 10h Multicast Address Hash Table 31 0 14...

Страница 51: ...ndled by the application code Command Status CSR Registers The CSR registers are essential in defining the operational characteristics of the Ethernet controller The CSR registers contain the followin...

Страница 52: ...mode and has no affect on MII mode operation 0 heart beat signal quality generator function enabled default 1 heart beat signal quality generator function is disabled PS Port Select 0 MII mode defaul...

Страница 53: ...t filter bit in the receive status word is set 1 for each broadcast frame received default 1 packet filter bit in the receive status word is reset 0 for each broadcast frame received DRTY Disable Retr...

Страница 54: ...m MAC Physical Address 47 32 These two bytes represent the 16 most significant bits of the MAC physical address CSR Register MAC Address Low Register Address 08h Bit Names 31 PADR 31 24 24 23 PADR 23...

Страница 55: ...64 bit hash table that are used for hash table filtering The multicast hash filtering mode is detailed later in the data sheet CSR Register Multicast Address Low Register Address 10h Bit Names 31 HT...

Страница 56: ...eration is to be requested of the addressed PHY PHY register 0 read 1 write BUSY Busy This status bit indicates when PHY communication is currently taking place on the MII serial management bus The ap...

Страница 57: ...MAC decodes if FCE 1 but does not set the receive status word packet filter bit default 1 MAC decodes if FCE 1 and sets the packet filter bit 1 for pause control frames FCE Flow Control Enable 0 MAC...

Страница 58: ...ne whether it is a VLAN1 frame If a non zero match occurs the max frame length is extended from 1518 Bytes to 1522 Bytes CSR Register VLAN2 Tag Register Address 24h Bit Names 31 24 23 16 15 VLAN2 15 8...

Страница 59: ...U Global Unicast 0 frames must pass the destination address filter as well as the wake up frame filter criteria in order to generate a wake up event default 1 frames must pass only the wake up frame f...

Страница 60: ...g edge of clock MDC The MII address 14h and MII data 18h CSR registers outlined previously in the CSR Register section are used by the CPU to monitor and control the 2 wire MII serial bus A write to t...

Страница 61: ...ect input is required for half duplex operation to signal when a collision has occurred on the physical media Ethernet Frames The basic purpose of the MII I O block is to deliver and receive Ethernet...

Страница 62: ...ter possibilities exist perfect inverse and hash Perfect filtering requires that the destination address perfectly match the MAC physical address that has been assigned in CSR registers MAC address hi...

Страница 63: ...ming TPID occupy the 13th and 14th byte positions those that would normally contain either the length or type field for the frame The TPID is compared against the VLAN1 20h and VLAN2 24h CSR registers...

Страница 64: ...receive data packets can span multiple pages The reset default state of the Ethernet buffer size select bits EBS 4 EBS 0 is 00000b which configures all 32 pages as transmit buffer memory As an exampl...

Страница 65: ...llision Observed This bit is only valid in half duplex mode and is always set if the late collision abort LTCOL bit is set in the status word 0 no late collisions observed 1 late collision collision a...

Страница 66: ...il 0 destination address of the current receive frame passed the applied address filter 1 destination address of the current receive frame failed the applied address filter BCF Broadcast Frame 0 recei...

Страница 67: ...valid for runt frames less than 14 Bytes 0 length specified in the length type field i e value equal or less than 1500 1 type specified in the length type field i e value greater than 1500 COL Collisi...

Страница 68: ...PMF of the BCUC SFR should be cleared and if the Enable Sleep Mode command was used to invoke sleep mode then the Disable Sleep Mode command must be issued Magic Packet and Network Wake Up Frame The p...

Страница 69: ...ontrols are the EA pin and the bypass ROM BROM SFR bit No matter the state of the BROM bit if the EA pin is held at a logic low level the TINI400 ROM code is not entered and is not accessible to the u...

Страница 70: ...e 12 ROM Code Boot Sequence N Y EA PIN ROM INIT RESET STATE NETBOOT BROM BIT POWER ON RESET BROM 0 SERIAL LOADER P1 7 PIN NETBOOT P5 3 PIN AUTO BAUD SUCCESS SERIAL LOADER FIND USER CODE RUN USER CODE...

Страница 71: ...ables PCE0 3 P5CNT 07h Enables CE4 7 1M peripheral chip enable P6CNT 27h Merged program data CE0 3 relocate internal XRAM MCON AFh Enables extended 1kB stack option ACON 2 1 Configure to maximum MOVX...

Страница 72: ...A summary of the supported serial loader commands can be seen in Table 17 A detailed description of each command and further information pertaining to the serial loader can be found in the High Speed...

Страница 73: ...should then respond with an IP address offering The DS80C400 subsequently requests the IP address to which the DHCP server must acknowledge In the DHCP acknowledge packet the TFTP server IP address is...

Страница 74: ...CRC 16 differs it performs a couple of write read back operations to assess whether the bank is flash or SRAM and then executes the erasure if flash and programming After completion of the TFTP server...

Страница 75: ...is fixed at addresses FF0002h XSB FF0003h MSB and FF0004h LSB The first three bytes of the export table contain the quantity of function entries in the export table In 3 Byte increments following the...

Страница 76: ...nnect 22 bind 23 listen 24 accept 25 recv 26 send 27 getsockopt 28 setsockopt 29 getsockname 30 getpeername 31 cleanup 32 avail 33 join 34 leave 35 ping 36 getnetworkparams 37 setnetworkparams 38 geti...

Страница 77: ...t 79 WOS_Tick Timer interrupt handler 80 BLOB Start address of the memory area ignored by NetBoot 81 WOS_IOPoll Asynchronous TCP IP maintenance functions 82 IP_ProcessReceiveQueues 83 IP_ProcessOutput...

Страница 78: ...t to the specified address port listen Listens for connections on the specified socket accept Accepts a TCP connection on the specified socket recv Reads data from the specified TCP socket connection...

Страница 79: ...bus timing establish identification mask bits and verify the source of individual messages Each message center is individually equipped with the necessary status and control bits to establish directi...

Страница 80: ...ARBITRATION REGISTER 0 xxDB12h C0M1AR1 CAN 0 MESSAGE 1 ARBITRATION REGISTER 1 xxDB13h C0M1AR2 CAN 0 MESSAGE 1 ARBITRATION REGISTER 2 xxDB14h C0M1AR3 CAN 0 MESSAGE 1 ARBITRATION REGISTER 3 WTOE xxDB15h...

Страница 81: ...plex identification schemes as tests can be made based on bit patterns rather than an exact match between all bits in the identification field and arbitration values The CAN controller also incorporat...

Страница 82: ...nd arbitration registers Message Center 15 Extended 29 bit Arbitration CAN 2 0B Message Center 15 Arbitration Registers 0 3 Located in message center 15 MOVX memory Message Center 15 Mask Registers 0...

Страница 83: ...rite access of the 1 Wire master address OWMAD EEh and 1 Wire master data OWMDR EFh SFRs When 1 Wire bus activity generates a condition that requires servicing by the CPU the bus master sets the appro...

Страница 84: ...data transmitted and received by the 1 Wire bus master passes through the transmit receive data buffer internal register address xxxxx001b The data buffer is double buffered with separate transmit and...

Страница 85: ...ces the bus master into search ROM accelerator mode in order to expedite the search ROM process The general principle of the search ROM process is to deselect one device after another at every conflic...

Страница 86: ...gister is sent or received before the associated interrupt flag occurs signaling the end of the transaction Clearing the bit leaves the bus master operating in full byte boundaries OD Bit 6 Overdrive...

Страница 87: ...ued a presence pulse on the OW line A read of the interrupt flag register clears this bit if the OW line is no longer low while the master is idle Bit 7 Peripheral Overview Primary Integrated System L...

Страница 88: ...oes awry and software does not reset the watchdog as scheduled the microcontroller is put in reset a known good state Software can select one of four timeout values as controlled by the WD1 and WD0 bi...

Страница 89: ...ct connection to common IrDA encoder decoder devices If the XCLKOE bit alone is set to logic 1 the CLKO pin outputs the system clock frequency divided by 2 4 6 or 8 as defined by clock output divide b...

Страница 90: ...ggered the flag follows the state of the interrupt pin Note 3 The global 1 Wire interrupt enable bit EOWMI and individual 1 Wire interrupt source enables are located in the internal 1 Wire bus master...

Страница 91: ...internal peripherals The system clock is run through a divide by 4 circuit to generate the machine cycle clock that provides the time base for CPU operations All instructions execute in one to five ma...

Страница 92: ...ing the write to these bits Figure 20 System Clock Control Diagram Switchback As an alternative to software changing the CD1 and CD0 clock control bits to exit PMM the microcontroller provides hardwar...

Страница 93: ...forces the microcontroller to a known state i e reset even if the oscillator stops The oscillator fail detect circuitry is enabled when software sets the enable bit OFDE PCON 4 to a 1 Please note tha...

Страница 94: ...e interrupt CAN interrupt or a reset condition Internally generated interrupts timer serial port watchdog cannot cause an exit from stop mode because internal clocks are not active in stop mode See th...

Страница 95: ...0 provides a special software breakpoint mode for code debug purposes Breakpoint mode can be enabled by setting the BPME bit ACON 4 to a logic 1 Once enabled the A5h op code can be used to create a br...

Страница 96: ...im Dallas Semiconductor reserves the right to change the circuitry and specifications without notice at any time Maxim Integrated Products 120 San Gabriel Drive Sunnyvale CA 94086 408 737 7600 2003 Ma...

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