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| 型號(hào)： | Am7968-175LMC |
| 廠商： | Advanced Micro Devices, Inc. |
| 英文描述： | TAXIchip Integrated Circuits(Transparent Asynchronous Xmitter-Receiver Interface) |
| 中文描述： | TAXIchip集成電路（透明異步Xmitter，接收器接口） |
| 文件頁(yè)數(shù)： | 95/127頁(yè) |
| 文件大?。?/td> | 730K |
| 代理商： | AM7968-175LMC |
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91
TAXIchip Integrated Circuit Technical Manual
APPENDIX B
Error Detec tion Effic ienc y
When a received data pattern does not represent a valid coding symbol, the TAXI
Receiver asserts the VLTNpin to indicate that the current data contains an error.
The Receiver cannot detect the occurrence of a bit error that transforms one valid
symbol into another valid but incorrect symbol. This means that the transition error can
change a valid data symbol into a different valid data symbol, or in certain cases a valid
Command symbol and not be flagged by the Violation pin.
A single noise event on the serial link can cause at a minimum a double bit error. Single
bit errors are assumed to be impossible (or at least rare) because NRZI encoding would
require that the voltage level on the link be inverted after the event. There is no known
error mechanism external to the TAXIchip set which could cause this condition. Having
confirmed that all errors are at least 2 bits wide, let us examine the location at which
these errors can exist.
Consider the 4B/5B encoded data pattern for the TAXIchip set in the 8-bit mode. The
output corresponds to two five bit nibbles for each eight bit data byte. Shown below are
four nibbles, or two bytes of encoded data output, with six possible locations for double
bit errors within nibble 1 of Byte 2.
Figure B-1
b
9
b
8
b
7
b
6
b
5
b
4
b
3
b
2
b
1
b
0
b
9
b
8
b
7
b
6
b
5
b
4
b
3
b
2
b
1
b
0
Byte 2
Byte 1
Nibble 2
Nibble 1
Nibble 2
Nibble 1
MSB
LSB MSB
LSB MSB
LSB MSB
LSB
A
B
C
D
E
F
Notes:
Error location A corresponds to a double bit error occurring in the Least Significant Bit of nibble 2 and the
Most Significant Bit of nibble 1.
Error locations B, C, D and E occur within the nibble between adjacent bits, and,
Error location F occurs between the LSB of nibble 1 (Byte 2) and the MSB of nibble 2 (Byte 1).
12330E-37
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| Am7969 | TAXIchip Integrated Circuits(Transparent Asynchronous Xmitter-Receiver Interface) |
| Am7968-125DKC | TAXIchip Integrated Circuits(Transparent Asynchronous Xmitter-Receiver Interface) |
| Am7969-125DKC | TAXIchip Integrated Circuits(Transparent Asynchronous Xmitter-Receiver Interface) |
| Am7968-175DKC | TAXIchip Integrated Circuits(Transparent Asynchronous Xmitter-Receiver Interface) |
| Am7969-175DKC | TAXIchip Integrated Circuits(Transparent Asynchronous Xmitter-Receiver Interface) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AM7968-175PC | 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:Transmitter |
| AM7968-175PCB | 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:Transmitter |
| AM7968-70/B3A | 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:Transmitter |
| AM7968-70/BXA | 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:Transmitter |
| AM7968-70DC | 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:Transmitter |
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