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參數(shù)資料
| 型號(hào)： | AM79C975 |
| 廠商： | Advanced Micro Devices, Inc. |
| 英文描述： | PCnet⑩-FAST III Single-Chip 10/100 Mbps PCI Ethernet Controller with Integrated PHY |
| 中文描述： | PCnet⑩快速三單芯片10/100 Mbps的PCI以太網(wǎng)控制器集成PHY |
| 文件頁(yè)數(shù)： | 114/304頁(yè) |
| 文件大?。?/td> | 2092K |
| 代理商： | AM79C975 |
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114
Am79C973/Am79C975
P R E L I M I N A R Y
ler within AMD
’
s product line. The Am79C973/
Am79C975 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 De-
vice ID is the same as the PCnet-PCI II (Am79C970A)
and PCnet-
FAST
(Am79C971) devices.
The PCI Device ID register is located at offset 02h in
the PCI Configuration Space. It is read only.
PCI Command Register
Offset 04h
The PCI Command register is a 16-bit register used to
control the gross functionality of the Am79C973/
Am79C975 controller. It controls the Am79C973/
Am79C975 controller
’
s ability to generate and respond
to PCI bus cycles. To logically disconnect the
Am79C973/Am79C975 device from all PCI bus cycles
except configuration cycles, a value of 0 should be writ-
ten 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
Am79C975 controller will not
generate Fast Back-to-Back cy-
cles.
Am79C973/
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 Am79C973/Am79C975
controller detects a parity error, it
only sets the Detected Parity Er-
ror bit in the PCI Status register.
When
PERREN
Am79C973/Am79C975 controller
asserts PERR on the detection of
a data parity error. It also sets the
DATAPERR bit (PCI Status reg-
ister, bit 8), when the data parity
error occurred during a master
cycle. PERREN also enables re-
porting address parity errors
through the SERR pin and the
SERR bit in the PCI Status regis-
ter.
is
1,
the
PERREN
H_RESET and is not affected by
S_RESET or by setting the STOP
bit.
is
cleared
by
5
VGASNOOP
VGA Palette Snoop. Read as ze-
ro; write operations have no ef-
fect.
4
MWIEN
Memory Write and Invalidate Cy-
cle Enable. Read as zero; write
operations have no effect. The
Am79C973/Am79C975 controller
only generates Memory Write cy-
cles.
3
SCYCEN
Special Cycle Enable. Read as
zero; write operations have no ef-
fect. The Am79C973/Am79C975
controller ignores all Special Cy-
cle operations.
2
BMEN
Bus Master Enable. Setting
BMEN enables the Am79C973/
Am79C975 controller to become
a bus master on the PCI bus. The
host must set BMEN before set-
ting the INIT or STRT bit in CSR0
of the Am79C973/Am79C975
controller.
BMEN is cleared by H_RESET
and is not effected by S_RESET
or by setting the STOP bit.
1
MEMEN
Memory Space Access Enable.
The Am79C973/Am79C975 con-
troller will ignore all memory ac-
cesses when MEMEN is cleared.
The host must set MEMEN be-
fore the first memory access to
the device.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AM79C973 | PCnet⑩-FAST III Single-Chip 10/100 Mbps PCI Ethernet Controller with Integrated PHY |
| AM79C973KCW | PCnet⑩-FAST III Single-Chip 10/100 Mbps PCI Ethernet Controller with Integrated PHY |
| AM79C975KCW | PCnet⑩-FAST III Single-Chip 10/100 Mbps PCI Ethernet Controller with Integrated PHY |
| AM79C973VCW | PCnet⑩-FAST III Single-Chip 10/100 Mbps PCI Ethernet Controller with Integrated PHY |
| AM79C975VCW | PCnet⑩-FAST III Single-Chip 10/100 Mbps PCI Ethernet Controller with Integrated PHY |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AM79C975BKC\\W | 制造商:Advanced Micro Devices 功能描述: |
| AM79C975BKC\W | 制造商:Advanced Micro Devices 功能描述: |
| AM79C975BKD\\W | 制造商:Advanced Micro Devices 功能描述: |
| AM79C975BKD\W | 制造商:Advanced Micro Devices 功能描述:PCnet-FAST III Single-Chip 10/100 Mbps PCI Ethernet Controller with Integrated PHY 制造商:AMD (Advanced Micro Devices) 功能描述:PCnet-FAST III Single-Chip 10/100 Mbps PCI Ethernet Controller with Integrated PHY |
| AM79C975BKDW | 制造商:Advanced Micro Devices 功能描述:PCnet-FAST III Single-Chip 10/100 Mbps PCI Ethernet Controller with Integrated PHY 制造商:AMD (Advanced Micro Devices) 功能描述:PCnet-FAST III Single-Chip 10/100 Mbps PCI Ethernet Controller with Integrated PHY |
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