參數(shù)資料
型號(hào)： AM79C971VCW
廠商： ADVANCED MICRO DEVICES INC
元件分類： 微控制器/微處理器
英文描述： PCnet⑩-FAST Single-Chip Full-Duplex 10/100 Mbps Ethernet Controller for PCI Local Bus
中文描述： 4 CHANNEL(S), 100M bps, LOCAL AREA NETWORK CONTROLLER, PQFP176
封裝： TQFP-176
文件頁(yè)數(shù)： 108/265頁(yè)
文件大?。?/td> 3190K
代理商： AM79C971VCW
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108
Am79C971
The following is a list of the registers that would typically
need to be periodically read and perhaps written during
the normal running operation of the Am79C971 control-
ler within a system. Each of these registers contains
control bits, or status bits, or both.
RAP
Register Address Port
CSR0
Am79C971 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
PCI Status register
The following registers are only necessary if an exter-
nal PHY device is being used and accessed.
BCR32
MII Control and Status
BCR33
MII Address
BCR34
MII Management Data
I
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 Am79C971 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.
PCI Device ID Register
Offset 02h
The PCI Device ID register is a 16-bit register that
uniquely identifies the Am79C971 controller within
AMD's product line. The Am79C971 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
PCnet-PCI II (Am79C970A) device.
The PCI Device ID register is located at offset 02h in
the PCI Configuration Space. It is read only.
This register is the same as BCR35 and can be written
by the EEPROM.
PCI Command Register
Offset 04h
The PCI Command register is a 16-bit register used to
control the gross functionality of the Am79C971 con-
troller. It controls the Am79C971 controller's ability to
generate and respond to PCI bus cycles. To logically
disconnect the Am79C971 device from all PCI bus cy-
cles except configuration cycles, a value of 0 should be
written to this register.
The PCI Command register is located at offset 04h in
the PCI Configuration Space. It is read and written by
the host.
Bit
Name
Description
15-10
RES
Reserved locations. Read as ze-
ros; write operations have no ef-
fect.
9
FBTBEN
Fast Back-to-Back Enable. Read
as zero; write operations have no
effect. The Am79C971 controller
will not generate Fast Back-to-
Back cycles.
8
SERREN
SERR Enable. Controls the as-
sertion of the SERR pin. SERR is
disabled
when
cleared. SERR will be asserted
on detection of an address parity
error and if both SERREN and
PERREN (bit 6 of this register)
are set.
SERREN
is
SERREN
H_RESET and is not effected by
S_RESET or by setting the STOP
bit.
is
cleared
by
7
RES
Reserved location. Read as ze-
ros; write operations have no ef-
fect.
6
PERREN
Parity Error Response Enable.
Enables the parity error response
functions. When PERREN is 0
and the Am79C971 controller de-
tects a parity error, it only sets the
Detected Parity Error bit in the
PCI Status register. When PER-
REN is 1, the Am79C971 control-
ler
asserts
PERR
detection of a data parity error. It
also sets the DATAPERR bit (PCI
Status register, bit 8), when the
data parity error occurred during
a master cycle. PERREN also
enables reporting address parity
on
the
相關(guān)PDF資料
PDF描述
AM79C971 PCnet⑩-FAST Single-Chip Full-Duplex 10/100 Mbps Ethernet Controller for PCI Local Bus
AM79C971KCW IC LOGIC 16211 24-BIT FET BUS SWITCH -40+85C TSSOP-56 35/TUBE
AM79C972BKCW PCnet⑩-FAST+ Enhanced 10/100 Mbps PCI Ethernet Controller with OnNow Support
AM79C972BKIW PCnet⑩-FAST+ Enhanced 10/100 Mbps PCI Ethernet Controller with OnNow Support
AM79C972BVCW PCnet⑩-FAST+ Enhanced 10/100 Mbps PCI Ethernet Controller with OnNow Support
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AM79C972 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:PCnet⑩-FAST+ Enhanced 10/100 Mbps PCI Ethernet Controller with OnNow Support
AM79C972BKC\\W 制造商:Advanced Micro Devices 功能描述:
AM79C972BKC\W 制造商:Advanced Micro Devices 功能描述:
AM79C972BKCW 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:PCnet⑩-FAST+ Enhanced 10/100 Mbps PCI Ethernet Controller with OnNow Support
AM79C972BKD/W 制造商:Advanced Micro Devices 功能描述:
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