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參數資料
型號: L84302
元件分類: 通用總線功能
英文描述: L84302 Quad 100/10 Mbps 4-Port Ethernet Controller with RMON/SNMP Management Counters technical manual 4/02
中文描述: L84302四100/10 Mbps的4端口以太網的遠程監控控制器/ SNMP管理處的技術手冊,4月2日
文件頁數: 21/128頁
文件大小: 997K
代理商: L84302
Functional Description
Copyright 1997-2002 by LSI Logic Corporation. All rights reserved.
21 of 128
April, 2002
Figure 4
Frame Formats and Bit Ordering
1010
1010
1010
1010
1010
1010
1011
MAC
PHY
Interface
10101010
10101010
10101010
10101010
10101010
10101010
10101010
10101011
DA [0:7]
DA [8:15]
DA [16:23]
DA [24:31]
DA [32:39]
DA [40:47]
DATA[0:7]
DATA[8:15]
DATA[16:23]
DATA[24:31]
[4] PRE
SFD
DA
SA
L/T
DATA
[5] FCS
Notes:
[1]
Status word on receive only is
programmable. Status word not affected by
big/little endian select.
EOF position is programmable. For more
details, refer to System Interface section.
Little endian format (default)
XMT preamble appended
RCV preamble stripped
RCV CRC not stripped
XMT CRC not appended
On receive side, some preamble nibbles may
be missing because they are consumed by
the PHY.
[2]
[3]
[4]
[5]
[6]
System Interface
SA [0:7]
SA [8:15]
SA [16:23]
SA [24:31]
SA [32:39]
SA [40:47]
LT [8:15]
LT [0:7]
FCS[31:24]
FCS[23:16]
FCS[15:8]
FCS[7:0]
0000
[6]
DA [0:3]
DA [4:7]
DA [8:11]
DA [12:15]
DA[0:7]
DA[32:39]
SA[16:23]
LT[8:15]
DATA[16:23]
DA[8:15]
DA[40:47]
SA[24:31]
LT[0:7]
DATA[24:31]
SOF
DA[16:23]
SA[0:7]
SA[32:39]
DATA[0:7]
DA[24:31]
SA[8:15]
SA[40:47]
DATA[8:15]
FCS[15:8]
FCS[7:0]
STATUS WORD [1]
FCS[31:24]
FCS[23:16]
INVALID
EOF
[2]
RXTXDATA0
RXTXDATA31
[3]
MSB
LSB
0000
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
DA[44:47]
SA [0:3]
SA [4:7]
SA [8:11]
SA [12:15]
SA[44:47]
LT [12:15]
LT [8:11]
LT [4:7]
LT [0:3]
DATA [0:3]
DATA [4:7]
DATA [8:11]
DATA [12:15]
FCS[31:28]
FCS[27:24]
FCS[23:20]
FCS[19:16]
FCS[15:12]
FCS[11:8]
FCS[7:4]
FCS[3:0]
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0000
0000
MSB
RXDV0 1 2 3
TXEN/
CRS
Bits
Transmitted
MII
10 Mbytes
Serial
TXD0/RXD0
TXD1/RXD1
TXD2/RXD2
TXD3/RXD3
LSB
Bytes
Transmitted
Bits
Transmitted
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