參數(shù)資料
型號: 82596DX
廠商: Intel Corp.
英文描述: HIGH-PERFORMANCE 32-BIT LOCAL AREA NETWORK COPROCESSOR
中文描述: 高性能的32位局域網(wǎng)協(xié)處理器
文件頁數(shù): 48/77頁
文件大?。?/td> 787K
代理商: 82596DX
82596DX/SX
The format of the Time Domain Reflectometer command is:
82586 and 32-Bit Segmented Modes
31
16
ODD WORD
15
0
EVEN WORD
EL
S
I
X
X
X
X
X
X
X
X
X
X
1
0
1
C
B OK 0
0
0
0
0
0
0
0
0
0
0
0
0
LNK XVR ET
OK PRB OPN SRT
ET
X
TIME
(11 bits)
A15
A0
LINK OFFSET
Linear Mode
16
31
ODD WORD
15
0
EVEN WORD
EL S
I
0
0
0
0
0
0
0
0
0
0
1
0
1
C
B OK 0
0
0
0
0
0
0
0
0
0
0
0
0
A31
A0
LINK ADDRESS
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
LNK
OK
XVR
PRB
ET
OPN
ET
SRT
X
TIME
(11 bits)
Figure 32. TDR
where:
LINK ADDRESS,
EL, B, C, I, S
D As per standard Command Block (see the NOP command for details).
A
D Indicates that the command was abnormally terminated due to CU Abort control
command. If one, then the command was aborted, and if necessary it should be
repeated. If this bit is zero, the command was not aborted.
Bits 19–28
D Reserved (0 in the 32-bit Segmented and Linear Modes).
CMD (Bits 16–18)
D The TDR command. Value: 5h.
TIME
D An 11-bit field that specifies the number of TxC cycles that elapsed before an echo
was observed. No echo is indicated by a reception consisting of ‘‘1s’’ only. Be-
cause the network contains various elements such as transceiver links, transceiv-
ers, Ethernet, repeaters etc., the TIME is not exactly proportional to the problems
distance.
D No link problem identified. TIME
e
7FFh.
D Indicates a Transceiver problem. Carrier Sense was inactive for 2048-bit time peri-
od. LNK OK
e
0. TIME
e
7FFh.
D The transmission line is not properly terminated. Collision Detect went active and
LNK OK
e
0.
D There is a short circuit on the transmission line. Carrier Sense Signal dropped and
LNK OK
e
0.
LNK OK (Bit 15)
XCVR PRB (Bit 14)
ET OPN (Bit 13)
ET SRT (Bit 12)
48
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82596SX HIGH-PERFORMANCE 32-BIT LOCAL AREA NETWORK COPROCESSOR
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