AM79C973 Datasheet, PDF (113/304 Pages) Advanced Micro Devices – PCnet™-FAST III Single-Chip 10/100 Mbps PCI Ethernet Controller with Integrated PHY

PRELIMINARY
CSR82 Bus Activity Timer
CSR100 Memory Error Timeout
CSR116^ OnNow Miscellaneous
CSR122 Receiver Packet Alignment Control
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^ Internal PHY Control and Status
BCR33^ Internal PHY 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
s Running Registers
These registers are intended to be used by the device
driver software after the Am79C973/Am79C975 con-
troller is running 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 Am79C973/
Am79C975 controller within a system. Each of these
registers contains control bits, or status bits, or both.
RAP
Register Address Port
CSR0
Am79C973/Am79C975 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 Internal PHY Control and Status
BCR33 Internal PHY Address
BCR34 Internal PHY Management Data
s 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 Am79C973/Am79C975
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 Am79C973/Am79C975 control-
Am79C973/Am79C975
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