參數(shù)資料
型號(hào)： AM79C972BVIW
廠商： ADVANCED MICRO DEVICES INC
元件分類： 微控制器/微處理器
英文描述： PCnet⑩-FAST+ Enhanced 10/100 Mbps PCI Ethernet Controller with OnNow Support
中文描述： 5 CHANNEL(S), 100M bps, LOCAL AREA NETWORK CONTROLLER, PQFP176
封裝： TQFP-176
文件頁(yè)數(shù)： 95/130頁(yè)
文件大?。?/td> 1580K
代理商： AM79C972BVIW
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Am79C972
95
USER ACCESSIBLE REGISTERS
The Am79C972 controller has three types of user reg-
isters: the PCI configuration registers, the Control and
Status registers (CSR), and the Bus Control registers
(BCR).
The Am79C972 controller implements all PCnet-ISA
(Am79C960) registers, all C-LANCE (Am79C90) regis-
ters, plus a number of additional registers. The
Am79C972 CSRs are compatible upon power up with
both the PCnet-ISA CSRs and all of the C-LANCE
CSRs.
The PCI configuration registers can be accessed in any
data width. All other registers must be accessed ac-
cording to the I/O mode that is currently selected.
When WIO mode is selected, all other register loca-
tions are defined to be 16 bits in width. When DWIO
mode is selected, all these register locations are de-
fined to be 32 bits in width, with the upper 16 bits of
most register locations marked as reserved locations
with undefined values. When performing register write
operations in DWIO mode, the upper 16 bits should al-
ways be written as zeros. When performing register
read operations in DWIO mode, the upper 16 bits of
I/O resources should always be regarded as having un-
defined values, except for CSR88.
The Am79C972 registers can be divided into four
groups: PCI Configuration, Setup, Running, and Test.
Registers not included in any of these categories can
be assumed to be intended for diagnostic purposes.
PCI Configuration Registers
These registers are intended to be initialized by the
system initialization procedure (e.g., BIOS device ini-
tialization routine) to program the operation of the
Am79C972 controller PCI bus interface.
The following is a list of the registers that would typi-
cally need to be programmed once during the initializa-
tion of the Am79C972 controller within a system:
—
PCI I/O Base Address or Memory Mapped I/O
Base Address register
—
PCI Expansion ROM Base Address register
—
PCI Interrupt Line register
—
PCI Latency Timer register
—
PCI Status register
—
PCI Command register
—
OnNow register
Setup Registers
These registers are intended to be initialized by the de-
vice driver to program the operation of various
Am79C972 controller features.
The following is a list of the registers that would typi-
cally need to be programmed once during the setup of
the Am79C972 controller within a system. The control
bits in each of these registers typically do not need to
be modified once they have been written. However,
there are no restrictions as to how many times these
registers may actually be accessed. Note that if the de-
fault power up values of any of these registers is ac-
ceptable to the application, then such registers need
never be accessed at all.
Note:
Registers marked with
“
^
”
may be programma-
ble through the EEPROM read operation and, there-
fore, do not necessarily need to be written to by the
system initialization procedure or by the driver soft-
ware. Registers marked with
“
*
”
will be initialized by the
initialization block read operation.
CSR1
Initialization Block Address[15:0]
CSR2*
Initialization Block Address[31:16]
CSR3
Interrupt Masks and Deferral Control
CSR4
Test and Features Control
CSR5
Extended Control and Interrupt
CSR7
Extended Control and Interrupt2
CSR8*
Logical Address Filter[15:0]
CSR9*
Logical Address Filter[31:16]
CSR10*
Logical Address Filter[47:32]
CSR11*
Logical Address Filter[63:48]
CSR12*^
Physical Address[15:0]
CSR13*^
Physical Address[31:16]
CSR14*^
Physical Address[47:32]
CSR15*
Mode
CSR24*
Base Address of Receive Ring Lower
CSR25*
Base Address of Receive Ring Upper
CSR30*
Base Address of Transmit Ring Lower
CSR31*
Base Address of Transmit Ring Upper
CSR47*
Transmit Polling Interval
CSR49*
Receive Polling Interval
CSR76*
Receive Ring Length
CSR78*
Transmit Ring Length
CSR80
DMA Transfer Counter and FIFO Thresh-
old Control
CSR82
Bus Activity Timer
CSR100
Memory Error Timeout
CSR116^
OnNow Miscellaneous
CSR122
Receiver Packet Alignment Control
相關(guān)PDF資料
PDF描述
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AM79C973 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:PCnet⑩-FAST III Single-Chip 10/100 Mbps PCI Ethernet Controller with Integrated PHY
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AM79C973AVC\\W 制造商:Advanced Micro Devices 功能描述:
AM79C973AVC\W 制造商:Advanced Micro Devices 功能描述:
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