參數(shù)資料
型號(hào)： AM79C972
廠商： Advanced Micro Devices, Inc.
英文描述： PCnet⑩-FAST+ Enhanced 10/100 Mbps PCI Ethernet Controller with OnNow Support
中文描述： PCnet⑩與OnNow增強(qiáng)10/100 Mbps的快速以太網(wǎng)控制器支持的PCI
文件頁(yè)數(shù)： 130/130頁(yè)
文件大?。?/td> 1580K
代理商： AM79C972
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130
Am79C972
CSR61: Previous Transmit Descriptor Address
Upper
Bit
Name
Description
31-16 RES
Reserved locations. Written as
zeros and read as undefined.
15-0
PXDAU
Contains the upper 16 bits of the
previous transmit descriptor ad-
dress pointer. The Am79C972
controller has the capability to
stack multiple transmit frames.
Read/Write accessible only when
either the STOP or the SPND bit
is set. These bits are unaffected
by H_RESET, S_RESET, or
STOP.
CSR62: Previous Transmit Byte Count
Bit
Name
Description
31-16 RES
Reserved locations. Written as
zeros and read as undefined.
15-12 RES
Reserved locations.
11-0
PXBC
Previous Transmit Byte Count.
This field is a copy of the BCNT
field of TMD1 of the previous
transmit descriptor.
Read/Write accessible only when
either the STOP or the SPND bit
is set. These bits are unaffected
by H_RESET, S_RESET, or
STOP.
CSR63: Previous Transmit Status
Bit
Name
Description
31-16 RES
Reserved locations. Written as
zeros and read as undefined.
15-0
PXST
Previous Transmit Status. This
field is a copy of bits 31-16 of
TMD1 of the previous transmit
descriptor.
Read/Write accessible only when
either the STOP or the SPND bit
is set. These bits are unaffected
by H_RESET, S_RESET, or
STOP.
CSR64: Next Transmit Buffer Address Lower
Bit
Name
Description
31-16 RES
Reserved locations. Written as
zeros and read as undefined.
15-0
NXBAL
Contains the lower 16 bits of the
next transmit buffer address from
which the Am79C972 controller
will transmit an outgoing frame.
Read/Write accessible only when
either the STOP or the SPND bit
is set. These bits are unaffected
by H_RESET, S_RESET, or
STOP.
Table 22.
Software Styles
SWSTYLE
[7:0]
Style
Name
SSIZE32
Initialization Block
Entries
Descriptor Ring Entries
00h
LANCE/
PCnet-ISA
controller
0
16-bit software structures,
non-burst or burst access
16-bit software structures,
non-burst access only
01h
RES
1
RES
RES
02h
PCnet-PCI
controller
1
32-bit software structures,
non-burst or burst access
32-bit software structures,
non-burst access only
03h
PCnet-PCI
controller
1
32-bit software structures,
non-burst or burst access
32-bit software structures,
non-burst or burst access
All Other
Reserved
Undefined
Undefined
Undefined
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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:
AM79C972BKD\\W 制造商:Advanced Micro Devices 功能描述:
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