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)： 147/265頁(yè)
文件大小： 3190K
代理商： AM79C971VCW
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Am79C971
147
P R E L I M I N A R Y
Read/Write accessible only when
either the STOP or the SPND bit
is set. This register is set to
0600h
by
S_RESET and is unaffected by
STOP.
H_RESET
or
CSR112: Missed Frame Count
Bit
Name
Description
31-16 RES
Reserved locations. Written as
zeros and read as undefined.
15-0
MFC
Missed Frame Count. Indicates
the number of missed frames.
MFC will roll over to a count of 0
from the value 65535. The MFCO
bit of CSR4 (bit 8) will be set each
time that this occurs.
Read accessible always. MFC is
read only, write operations are ig-
nored. MFC is cleared by
H_RESET or S_RESET or by
setting the STOP bit.
CSR114: Receive Collision Count
Bit
Name
Description
31-16 RES
Reserved locations. Written as
zeros and read as undefined.
15-0
RCC
Receive Collision Count. Indi-
cates the total number of colli-
sions
encountered
receiver since the last reset of the
counter.
by
the
RCC will roll over to a count of 0
from the value 65535. The
RCVCCO bit of CSR4 (bit 5) will
be set each time that this occurs.
Read accessible always. RCC is
read only, write operations are ig-
nored. RCC is cleared by
H_RESET or S_RESET, or by
setting the STOP bit.
CSR122: Advanced Feature Control
Bit
Name
Description
31-16 RES
Reserved locations. Written as
zeros and read as undefined.
15-1
RES
Reserved locations. Written as
zeros and read as undefined.
0
RCVALGN
Receive Packet Align. When set,
this bit forces the data field of ISO
8802-3 (IEEE/ANSI 802.3) pack-
ets to align to 0. MOD 4 address
boundaries (i.e., DWord aligned
addresses). It is important to note
that this feature will only function
correctly if all receive buffer
boundaries are DWord aligned
and all receive buffers have 0
MOD 4 lengths. In order to ac-
complish the data alignment, the
Am79C971 controller simply in-
serts two bytes of random data at
the beginning of the receive pack-
et (i.e., before the ISO 8802-3
(IEEE/ANSI 802.3) destination
address field). The MCNT field
reported to the receive descriptor
will not include the extra two
bytes.
Read/Write accessible always.
RCVALGN
is
H_RESET or S_RESET and is
not affected by STOP.
cleared
by
CSR124: Test Register 1
This register is used to place the Am79C971 controller
into various test modes. The Runt Packet Accept is the
only user accessible test mode. All other test modes are
for AMD internal use only.
Bit
Name
Description
31-16 RES
Reserved locations. Written as
zeros and read as undefined.
15-4
RES
Reserved locations. Written as
zeros and read as undefined.
3
RPA
Runt Packet Accept. This bit
forces the Am79C971 controller
to accept runt packets (packets
shorter than 64 bytes).
Read accessible always; write
accessible only when STOP is
set to 1. RPA is cleared by
H_RESET or S_RESET and is
not affected by STOP.
2-0
RES
Reserved locations. Written as
zeros and read as undefined.
CSR125: MAC Enhanced Configuration Control
Bit
Name
Description
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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