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AM79C972BVCW Datasheet(PDF) 96 Page - Advanced Micro Devices |
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AM79C972BVCW Datasheet(HTML) 96 Page - Advanced Micro Devices |
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96 / 130 page  96 Am79C972 CSR125^ MAC Enhanced Configuration Control BCR2^ Miscellaneous Configuration BCR4^ LED0 Status BCR5^ LED1 Status BCR6^ LED2 Status BCR7^ LED3 Status BCR9^ Full-Duplex Control BCR18^ Bus and Burst Control BCR19 EEPROM Control and Status BCR20 Software Style BCR22^ PCI Latency BCR23^ PCI Subsystem Vendor ID BCR24^ PCI Subsystem ID BCR25^ SRAM Size BCR26^ SRAM Boundary BCR27^ SRAM Interface Control BCR32^ MII Control and Status BCR33^ MII Address BCR35^ PCI Vendor ID BCR36 PCI Power Management Capabilities (PMC) Alias Register BCR37 PCI DATA Register Zero (DATA0) Alias Register BCR38 PCI DATA Register One (DATA1) Alias Register BCR39 PCI DATA Register Two (DATA2) Alias Register BCR40 PCI DATA Register Three (DATA3) Alias Register BCR41 PCI DATA Register Four (DATA4) Alias Register BCR42 PCI DATA Register Five (DATA5) Alias Register BCR43 PCI DATA Register Six (DATA6) Alias Reg- ister BCR44 PCI DATA Register Seven (DATA7) Alias Register BCR45 OnNow Pattern Matching Register 1 BCR46 OnNow Pattern Matching Register 2 BCR47 OnNow Pattern Matching Register 3 n Running Registers These registers are intended to be used by the device driver software after the Am79C972 controller is run- ning to access status information and to pass control information. The following is a list of the registers that would typi- cally need to be periodically read and perhaps written during the normal running operation of the Am79C972 controller within a system. Each of these registers con- tains control bits, or status bits, or both. RAP Register Address Port CSR0 Am79C972 Controller Status CSR3 Interrupt Masks and Deferral Control CSR4 Test and Features Control CSR5 Extended Control and Interrupt CSR7 Extended Control and Interrupt2 CSR112 Missed Frame Count CSR114 Receive Collision Count BCR32 MII Control and Status BCR33 MII Address BCR34 MII Management Data n Test Registers These registers are intended to be used only for testing and diagnostic purposes. Those registers not included in any of the above lists can be assumed to be intended for diagnostic purposes. PCI Configuration Registers PCI Vendor ID Register Offset 00h The PCI Vendor ID register is a 16-bit register that iden- tifies the manufacturer of the Am79C972 controller. AMD’s Vendor ID is 1022h. Note that this vendor ID is not the same as the Manufacturer ID in CSR88 and CSR89. The vendor ID is assigned by the PCI Special Interest Group. The PCI Vendor ID register is located at offset 00h in the PCI Configuration Space. It is read only. This register is the same as BCR35 and can be written by the EEPROM. PCI Device ID Register Offset 02h The PCI Device ID register is a 16-bit register that uniquely identifies the Am79C972 controller within AMD's product line. The Am79C972 Device ID is 2000h. Note that this Device ID is not the same as the Part number in CSR88 and CSR89. The Device ID is assigned by AMD. The Device ID is the same as the |
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