LXT970A Datasheet, PDF (34/74 Pages) Intel Corporation – Dual-Speed Fast Ethernet Transceiver

LXT970A — Dual-Speed Fast Ethernet Transceiver
Table 17. 4B/5B Coding
Code Type
4B Code
3210
Name
5B Symbol
43210
Interpretation
0000
0
11110
Data 0
0001
1
01001
Data 1
0010
2
10100
Data 2
0011
3
10101
Data 3
0100
4
01010
Data 4
0101
5
01011
Data 5
0110
6
01110
Data 6
DATA
0111
7
01111
Data 7
1000
8
10010
Data 8
1001
9
10011
Data 9
1010
A
10110
Data A
1011
B
10111
Data B
1100
C
11010
Data C
1101
D
11011
Data D
1110
E
11100
Data E
1111
F
IDLE
undefined
I¹
0101
J²
CONTROL
0101
K²
undefined
T³
undefined
R³
undefined
H⁴
11101
11111
11000
10001
01101
00111
00100
Data F
Idle. Used as inter-stream fill code
Start-of-Stream Delimiter (SSD), part 1 of 2
Start-of-Stream Delimiter (SSD), part 2 of 2
End-of-Stream Delimiter (ESD), part 1 of 2
End-of-Stream Delimiter (ESD), part 2 of 2
Transmit Error. Used to force signaling errors
undefined
Invalid
00000
Invalid
undefined
Invalid
00001
Invalid
undefined
Invalid
00010
Invalid
INVALID
undefined
Invalid
00011
Invalid
undefined
Invalid
00101
Invalid
undefined
Invalid
00110
Invalid
undefined
Invalid
01000
Invalid
undefined
Invalid
01100
Invalid
undefined
Invalid
10000
Invalid
undefined
Invalid
11001
Invalid
1. The /I/ (Idle) code-group is sent continuously between frames.
2. The /J/ and /K/ (SSD) code-groups are always sent in pairs; /K/ follows /J/.
3. The /T/ and /R/ (ESD) code-groups are always sent in pairs; /R/ follows /T/.
4. An /H/ (Error) code-group is used to signal an error condition.
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Datasheet