參數(shù)資料
型號(hào): MC92600
廠商: Motorola, Inc.
英文描述: High-speed, Full-duplex, Serial Data Interface(高速全雙工串行數(shù)據(jù)接口)
中文描述: 高速,全雙工,串行數(shù)據(jù)接口(高速全雙工串行數(shù)據(jù)接口)
文件頁(yè)數(shù): 71/82頁(yè)
文件大小: 1056K
代理商: MC92600
Appendix A. 8B/10B Coding Scheme
A-1
Appendix A
8B/10B Coding Scheme
The WarpLink Quad provides Tbre channel-speciTc 8B/10B encoding and decoding based
on the FC-1 Tbre channel standard. Given 8 bits entering a channel, the 8B/10B encoding
converts them to 10 bits thereby increasing the transition density of the serially transmitted
signal.
A.1 Overview
The FC-1 standard applies an algorithm that ensures that no more than Tve 1s or 0s are
transmitted consecutively, giving a transition density equal to 2.5 for each 10 bit data block.
Such a density ensures proper DC balance across the link and is sufTcient for good clock
recovery.
In the 8B/10B notation scheme, bytes are referred to as transmission characters, and each
bit is represented by letters. Unencoded bits, the 8 bits that have not passed through a
8B/10B encoder, are represented by letters òAó through òH,ó
which are bits 0 through 7.
Figure A-1. Unencoded Transmission Character Bit Ordering
Encoded bits, those that have passed through an encoder, are represented with the lettersòaó
through òj,ó representing bits 0D9 respectively. Character (bit) ordering in the Tbre channel
nomenclature is little-endian, with òaó being the most signiTcant bit in a byte.
One unencoded transmission character (Byte)
H
G
F
E
D
C
B
A
Bit
7
Bit
6
Bit
5
Bit
4
Bit
3
Bit
2
Bit
1
Bit
0
-
msb
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