參數(shù)資料
型號： AM79C970
廠商： Advanced Micro Devices, Inc.
英文描述： PCnetTM-PCI Single-Chip Ethernet Controller for PCI Local Bus
中文描述： PCnetTM - PCI單芯片以太網(wǎng)控制器的PCI總線
文件頁數(shù)： 103/168頁
文件大?。?/td> 943K
代理商： AM79C970
AMD
P R E L I M I N A R Y
1-970
Am79C970
Read/write accessible only when
STOP bit is set. These bits are
unaffected
by
S_RESET or STOP.
H_RESET,
CSR67: Next Transmit Status
Bit
Name
Description
31–16
RES
Reserved locations. Written as
ZEROs and read as undefined.
Next Transmit Status. This field
is a copy of bits 31–24 of TMD1 of
the next transmit descriptor.
Read/write accessible only when
STOP bit is set. These bits are
unaffected
by
S_RESET or STOP.
Reserved locations. Read and
written as ZERO.
Accessible only when STOP bit is
set.
15–8
NXST
H_RESET,
7–0
RES
CSR72: Receive Ring Counter
Bit
Name
Description
31–16
RES
Reserved locations. Written as
ZEROs and read as undefined.
Receive Ring Counter location.
Contains a Two’s complement
binary number used to number
the current receive descriptor.
This counter interprets the value
in CSR76 as pointing to the first
descriptor. A counter value of
ZERO corresponds to the last
descriptor in the ring.
Read/write accessible only when
STOP bit is set. These bits are
unaffected
by
S_RESET or STOP.
15–0 RCVRC
H_RESET,
CSR74: Transmit Ring Counter
Bit
Name
Description
31–16
RES
Reserved locations. Written as
ZEROs and read as undefined.
Transmit Ring Counter location.
Contains a Two’s complement
binary number used to number
the current transmit descriptor.
This counter interprets the value
in CSR78 as pointing to the first
descriptor. A counter value of
ZERO corresponds to the last
descriptor in the ring.
Read/write accessible only when
STOP bit is set. These bits are
15–0 XMTRC
unaffected
S_RESET or STOP.
by
H_RESET,
CSR76: Receive Ring Length
Bit
Name
Description
31–16
RES
Reserved locations. Written as
ZEROs and read as undefined.
Receive Ring Length. Contains
the two’s complement of the re-
ceive descriptor ring length. This
register is initialized during the
PCnet-PCI initialization routine
based on the value in the RLEN
field of the initialization block.
However, this register can be
manually altered. The actual re-
ceive ring length is defined by the
current value in this register. The
ring length can be defined as any
value from 1 to 65535.
Read/write accessible only when
STOP bit is set. These bits are
unaffected
by
S_RESET or STOP.
15–0
RCVRL
H_RESET,
CSR78: Transmit Ring Length
Bit
Name
Description
31–16
RES
Reserved locations. Written as
ZEROs and read as undefined.
Transmit Ring Length. Contains
the two’s complement of the
transmit descriptor ring length.
This register is initialized during
the PCnet-PCI initialization rou-
tine based on the value in the
TLEN field of the initialization
block. However, this register can
be manually altered. The actual
transmit ring length is defined by
the current value in this register.
The ring length can be defined as
any value from 1 to 65535.
Read/write accessible only when
STOP bit is set. These bits are
unaffected
by
S_RESET or STOP.
15–0
XMTRL
H_RESET,
CSR80: DMA Transfer Counter and FIFO Thresh-
old Control
Bit
Name
Description
31–16
RES
Reserved locations. Written as
ZEROs and read as undefined.
Reserved locations. Read as
ones and written as ZERO.
15–14
RES
相關(guān)PDF資料
PDF描述
AM79C971VCW PCnet⑩-FAST Single-Chip Full-Duplex 10/100 Mbps Ethernet Controller for PCI Local Bus
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
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AM79C970A 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:PCnet-PCI II Single-Chip Full-Duplex Ethernet Controller for PCI Local Bus Product
AM79C970AKC 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:PCnet-PCI II Single-Chip Full-Duplex Ethernet Controller for PCI Local Bus Product
AM79C970AKC\\W 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Advanced Micro Devices 功能描述:
AM79C970AKC\W 制造商:Rochester Electronics LLC 功能描述:- Bulk
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