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參數(shù)資料
| 型號(hào)： | AM79C976 |
| 廠商： | Advanced Micro Devices, Inc. |
| 英文描述： | PCnet-PRO⑩ 10/100 Mbps PCI Ethernet Controller |
| 中文描述： | PCnet -專業(yè)⑩個(gè)10/100Mbps PCI以太網(wǎng)控制器 |
| 文件頁(yè)數(shù)： | 112/309頁(yè) |
| 文件大小： | 2070K |
| 代理商： | AM79C976 |
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112
Am79C976
8/01/00
P R E L I M I N A R Y
The PCI Command register 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. When
this bit is set to 1, the Am79C976
controller will generate Fast
Back-to-Back cycles. When this
bit is cleared to 0, the Am79C976
controller will not generate Fast
Back-to-Back cycles.
FBTBEN is cleared by H_RESET
and is not effected by S_RESET
or by setting the STOP bit.
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 Am79C976 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 Am79C976 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
errors through the SERR pin and
the SERR bit in the PCI Status
register.
on
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. When this bit is set to
1, the Am79C976 controller will
generate Memory Write and In-
validate (MWI) cycles when ap-
propriate. When the bit is cleared
to 0, the device will generate
Memory Write cycles instead of
MWI cycles.
MWIEN is cleared by H_RESET
and is not affected by S_RESET
or by setting the STOP bit.
3
SCYCEN
Special Cycle Enable. Read as
zero; write operations have no ef-
fect. The Am79C976 controller
ignores all Special Cycle opera-
tions.
2
BMEN
Bus Master Enable. Setting
BMEN enables the Am79C976
controller to become a bus mas-
ter on the PCI bus. The host must
set BMEN before setting the INIT
or STRT bit in CSR0 of the
Am79C976 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 Am79C976 controller will ig-
nore all memory accesses when
MEMEN is cleared. The host
must set MEMEN before the first
memory access to the device.
For memory mapped I/O, the
host must program the PCI Mem-
ory Mapped I/O Base Address
register with a valid memory ad-
dress before setting MEMEN.
For accesses to the Expansion
ROM, the host must program the
PCI Expansion ROM Base Ad-
dress register at offset 30h with a
valid memory address before set-
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AM79C976KIW | PCnet-PRO⑩ 10/100 Mbps PCI Ethernet Controller |
| AM79C976KCW | PCnet-PRO⑩ 10/100 Mbps PCI Ethernet Controller |
| AM79C978AKCW | Single-Chip 1/10 Mbps PCI Home Networking Controller |
| AM79C978AVCW | Single-Chip 1/10 Mbps PCI Home Networking Controller |
| AM79C978 | Single-Chip 1/10 Mbps PCI Home Networking Controller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AM79C976KC | 制造商:Rochester Electronics LLC 功能描述:METRIC PLASTIC QUAD-RING - Bulk |
| AM79C976KCW | 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:PCnet-PRO⑩ 10/100 Mbps PCI Ethernet Controller |
| AM79C976KD | 制造商:Advanced Micro Devices 功能描述:ETHERNET:MEDIA ACCESS CONTROLLER (MAC) |
| AM79C976KF | 制造商:Advanced Micro Devices 功能描述:Ethernet CTLR Single Chip 10Mbps/100Mbps 3.3V 208-Pin PQFP 制造商:AMD (Advanced Micro Devices) 功能描述:Ethernet CTLR Single Chip 10Mbps/100Mbps 3.3V 208-Pin PQFP |
| AM79C976KI | 制造商:Advanced Micro Devices 功能描述:Ethernet CTLR Single Chip 10Mbps/100Mbps 3.3V 208-Pin PQFP 制造商:AMD (Advanced Micro Devices) 功能描述:Ethernet CTLR Single Chip 10Mbps/100Mbps 3.3V 208-Pin PQFP |
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