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8B10B 参数 Datasheet PDF下载

8B10B图片预览
型号: 8B10B
PDF下载: 下载PDF文件 查看货源
内容描述: 编码器/解码器 [Encoder/Decoder]
分类和应用: 解码器编码器
文件页数/大小: 40 页 / 497 K
品牌: ALTERA [ ALTERA CORPORATION ]
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3. Specifications  
The MegaCore® function consists of an encoder (ENC8B10B) and a  
decoder (DEC8B10B). See Figure 3–2 on page 3–3. The encoder encodes  
one 8-bit byte of data into a 10-bit transmission code, and the decoder  
decodes a 10-bit code into one 8-bit byte of data. Figure 3–1 illustrates the  
bidirectional conversion process.  
Functional  
Description  
The eight input bits are named A, B, C, D, E, F, G, H. Bit Ais the least  
significant bit (LSB), and bit His the most significant bit (MSB). They are  
split into two groups: The five-bit group A, B, C, D, E, and the three-bit  
group F, G, H.  
The coded bits are named a, b, c, d, e, i, f, g, h, j(the order is not  
alphabetical). These bits are also split into two groups: the six-bit group  
a, b, c, d, e, i, and the four-bit group f, g, h, j.  
Figure 3–1. 8b10b Conversion  
7
6
5
F
4
3
2
1
0
H
G
E
D
C
B
A
8b10b  
Conversion  
j
h
8
g
f
i
e
4
d
3
c
b
1
a
0
9
7
6
5
2
MSB sent last  
LSB sent first  
In bit serial transmission, the LSB is usually transmitted first, while the  
MSB is usually transmitted last.  
Disparity  
Disparity is the difference between the number of 1s and 0s in the  
encoded word.  
Altera Corporation  
October 2007  
MegaCore Version 7.2  
7.23–1  
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