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Sun Microsystems STP2002QFP 7.5.47 TX_MAC Random Number Seed Register, 7.5.48 TX_MAC State Machine Register

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STP2002QFP

Fast Ethernet, Parallel Port, SCSI (FEPS) - STP2002QFP

Sun Microsystems,

7.5.47 TX_MAC Random Number Seed Register

This 10-bit register is used as a seed for the random number generator in the

backoff algorithm. The register has significance only after power-on reset,

and it should be programmed with a random value which has a high likeli-

hood of being unique for each MAC attached to a network segment (10 LSB

of the MAC address). During normal operation, the register contents are up-

dated constantly by the hardware, and a PIO read from this register will return

an unpredictable result.

7.5.48 TX_MAC State Machine Register

This eight-bit register provides the current state for all the state machines in

TX_MAC.

Table 176: TX_MAC Late Collision Counter Deﬁnition

Field Bits Description Type

Late collision counter 7:0 Loadable counter increments for every

transmit frame that has experienced a late

collision.

R/W

Table 177: TX_MAC Random Number Seed Register Address

Register Physical Address Access Size

Random number seed register 0x8C0_6250 4 bytes

Table 178: TX_MAC Random Number Seed Register Deﬁnition

Field Bits Description Type

Random number seed 9:0 Seed for the random number generator in

the backoff algorithm.

R/W

Table 179: TX_MAC State Machine Register Address

Register Physical Address Access Size

TX_MAC state machine register 0x8C0_6254 4 bytes

Contents

Main STP2002QFP STP2002QFP Fast Ethernet, Parallel Port, SCSI (FEPS) USERS GUIDE OVERVIEW 1 1.1 Introduction 1.4 Technology Information 1.5 Compliance Page Page 1.6 Pin Descriptions The signal pins are grouped by function in the following tables. Table 1: SBus Signals Table 2: SCSI Signals Table 3: Ethernet Signals Table 2: SCSI Signals Table 4: Parallel Port Signals Table 5: JTAG/Miscellaneous Signals Page SBUS ADAPTER 2 2.1 Introduction 2.2 SBus Capabilities 2.2.1 Slave Accesses 2.2.2 Master Accesses 2.3 Theory of Operation 2.3.1 Master Operations 2.3.2 Slave Operation SCSI CHANNEL 3 3.1 Introduction 3.2 SCSI DVMA 3.3 FAS366 3.4 Test Support PARALLEL PORT CHANNEL 4 4.1 Introduction 4.2 Parallel Port FIFO Operation 4.3 Bidirectional Parallel Port Interface 4.3.1 DMA Mode Page Page Page Page STP2002QFP Page Page Page Page 4.3.2 Programmed I/O Mode Page 4.4 Differences from STP2000 (MACIO) Parallel Port 4.5 Test Support ETHERNET CHANNEL 5 5.1 Introduction 5.2 Functional Description 5.2.1 Overview 5.2.2 Functional Blocks Page Page 5.2.3 Clock Domains 5.2.4 Host Memory Data Management 5.2.5 Transmit Data Descriptor Ring 5.2.6 Receive Free Buffer Descriptor Ring 5.2.7 Local Memory Data Management 5.2.8 Transmit FIFO Data Structures 5.2.9 Receive FIFO Data Structures 5.3 Error Conditions and Recovery 5.3.1 Fatal Errors 5.3.2 Non-Fatal Errors Page 5.4 Programmers Reference 5.4.1 Overview 5.4.2 Host Memory Data Structures 5.4.3 Transmit Data Structures nearest burst boundary and execute a full DVMA burst read. Figure 10. Transmit Host Data Structures 5.4.4 Receive Data Structures Programming Restrictions: Free receive data buffers must be 64-byte aligned. Table 12: Receive Data Structures Descriptor Layout: Status Word Table 13: Receive Data Structures: Descriptor Layout: Free Buffer Pointer 5.4.5 Local Memory Data Structures 5.4.6 TxFIFO Data Structures 5.4.7 RxFIFO Data Structures Figure 12. TxFIFO Organization 5.4.8 Other User Accessible Resources less specified otherwise. Figure 13. RxFIFO Organization T 6.1 Introduction 6.2 JTAG Macro 6.2.1 TAP Controller 6.2.2 Instruction Register Page 6.2.3 Instruction Decode Logic 6.2.4 Bypass Register 6.2.5 Internal Register Clocking Logic 6.2.6 JTAG ID Register 6.2.7 Boundary Scan Control Logic 6.2.8 TDO MUX logic 6.3 Special JTAG Instructions 6.3.1 Debug Modes 6.3.2 INTEST 6.3.3 SCSI Test Mode 6.4 Clock Stop Pin 6.5 Test Vectors PROGRAMMING MODEL 7 7.1 Introduction 7.2 Parallel Port Channel Registers 7.2.1 Control/Status Register Table 18: Control/Status Register Address Page Page Page 7.2.2 DMA Address and Next Address Register 7.2.3 Byte Count Register Page 7.2.5 Hardware Conguration Register Table 26: Test Control/Status Register Denition Table 27: Hardware Conguration Register Address 7.2.6 Operation Conguration Register Page Page Page 7.2.7 Parallel Data Register 7.2.8 Transfer Control Register Page Page 7.2.9 Output Register 7.2.10 Input Register 7.2.11 Interrupt Control Register Page 7.3 SCSI Channel Registers 7.3.1 SCSI Control/Status Register D_INT_PEND: Table 43: BURST_SIZE Encoding Table 42: Control/Status Register Denition 7.3.2 SCSI Address Register 7.3.3 SCSI Byte Count Register 7.3.4 SCSI Test Control/Status Register Page Page 7.4 FAS366 (SCSI Controller Core) Registers 7.4.1 FAS366 Transfer Counter Low Register (Read Only) 7.4.2 FAS366 Transfer Count Low Register (Write Only) 7.4.3 FAS366 Transfer Counter High Register (Read Only) 7.4.4 FAS366 Transfer Count High (Write Only) Register 7.4.5 FAS366 FIFO Register 7.4.6 FAS366 Command Register Page 7.4.8 FAS366 Select/Reselect Bus ID Register 7.4.9 FAS366 Interrupt Register 7.4.10 FAS366 Select/Reselect Time-Out Register 7.4.11 FAS366 Sequence Step Register 7.4.12 FAS366 Synchronous Transfer Period Register 7.4.13 FAS366 FIFO Flags Register 7.4.14 FAS366 Synchronous Offset Register 7.4.15 FAS366 Conguration #1 Register 7.4.16 FAS366 Clock Conversion Factor Register 7.4.17 FAS366 Status #2 Register 7.4.18 FAS366 Test Register 7.4.19 FAS366 Conguration #2 Register 7.4.20 FAS366 Conguration #3 Register 7.4.21 FAS366 Recommand Counter Register 7.5 Ethernet Channel Registers 7.5.1 Global Software Reset Register 7.5.2 Global Conguration Register 7.5.3 Global Interrupt Mask Register (RW) 7.5.4 Global Status Register Table 98: Global Status Register Denition 7.5.5 ETX Transmit Pending Command 7.5.6 ETX Conguration Register 7.5.7 ETX Transmit Descriptor Pointer (RW) 7.5.8 ETX Transmit Descriptor Ring Size 7.5.9 ETX Transmit Data Buffer Base Address 7.5.10 ETX Transmit Data Buffer Displacement (RO) 7.5.11 ETX Transmit Data Pointer 7.5.12 ETX TxFIFO Packet Counter 7.5.13 ETX TxFIFO Write Pointer 7.5.14 ETX TxFIFO Shadow Write Pointer 7.5.15 ETX TxFIFO Read Pointer 7.5.16 ETX TxFIFO Shadow Read Pointer 7.5.17 ETX State Machine Register 7.5.18 ETX TxFIFO 7.5.19 ERX Conguration Register 7.5.20 ERX Receive Descriptor Pointer Table 124: ERX Conguration Register Denition Table 125: ERX Receive Descriptor Pointer Register Address 7.5.21 ERX Receive Data Buffer Pointer 7.5.22 ERX RxFIFO Write Pointer Page 7.5.23 ERX RxFIFO Shadow Write Pointer 7.5.24 ERX RxFIFO Read Pointer 7.5.25 ERX RxFIFO Packet Counter 7.5.26 ERX State Machine Register 7.5.27 ERX RxFIFO 7.5.28 XIF Conguration Register Table 141: XIF Conguration Register Denition 7.5.29 TX_MAC Software Reset Command 7.5.30 TX_MAC Conguration Register Table 144: TX_MAC Conguration Register Denition 7.5.31 TX_MAC InterPacketGap1 Register 7.5.32 TX_MAC InterPacketGap2 Register 7.5.33 TX_MAC AttemptLimit Register 7.5.34 TX_MAC SlotTime Register 7.5.35 TX_MAC PA Size Register 7.5.36 TX_MAC PA Pattern Register 7.5.37 TX_MAC SFD Pattern Register 7.5.38 TX_MAC JamSize Register 7.5.39 TX_MAC TxMaxFrameSize Register 7.5.40 TX_MAC TxMinFrameSize Register 7.5.41 TX_MAC PeakAttempts Register 7.5.42 TX_MAC Defer Timer 7.5.43 TX_MAC Normal Collision Counter 7.5.44 TX_MAC First Successful Collision Counter 7.5.45 TX_MAC Excessive Collision Counter 7.5.46 TX_MAC Late Collision Counter 7.5.47 TX_MAC Random Number Seed Register 7.5.48 TX_MAC State Machine Register 7.5.49 RX_MAC Software Reset Command 7.5.50 RX_MAC Conguration Register Table 183: RX_MAC Conguration Register Denition 7.5.51 RX_MAC RxMaxFrameSize Register 7.5.52 RX_MAC RxMinFrameSize Register Page 7.5.54 RX_MAC MAC Address 1 Register 7.5.55 RX_MAC MAC Address 0 Register 7.5.56 RX_MAC Receive Frame Counter 7.5.57 RX_MAC Length Error Counter 7.5.58 RX_MAC Alignment Error Counter 7.5.59 RX_MAC FCS Error Counter 7.5.60 RX_MAC State Machine Register 7.5.61 RX_MAC Rx Code Violation Counter 7.5.62 RX_MAC Hash Table 3 Register 7.5.63 RX_MAC Hash Table 2 Register 7.5.64 RX_MAC Hash Table 1 Register 7.5.65 RX_MAC Hash Table 0 Register 7.5.66 RX_MAC Address Filter 2 Register 7.5.67 RX_MAC Address Filter 1 Register 7.5.68 RX_MAC Address Filter 0 Register 7.5.69 RX_MAC Address Filter Mask Register 7.5.70 MIF Bit-Bang Clock 7.5.71 MIF Bit-Bang Data 7.5.72 MIF Bit-Bang Output Enable 7.5.73 MIF Frame/Output Register 7.5.74 MIF Conguration Register This 15-bit register controls the operation of the MIF. Table 227: MIF Conguration Register Address Table 226: MIF Frame/Output Register Denition 7.5.75 MIF Mask Register Table 228: MIF Conguration Register Denition 7.5.76 MIF Status Register 7.5.77 MIF State Machine Register PIN ASSIGNMENTS 8 8.1 Pin Assignments The Table 235 describes the pin assignments for the 240-pin PQFP FEPS package. Page Page Page Page Page Page Page ERRATA 9 9.1 Description of Errata in FEPS Rev 2.2 9.1.1 SCSI DVMA/Channel Engine (CE) Page Page 9.1.2 FAS366 Core 9.1.3 Ethernet Channel