AM79C973BKC AMD (ADVANCED MICRO DEVICES), AM79C973BKC Datasheet - Page 83

• Manufacturer Part Number: AM79C973BKC
• Manufacturer: AMD (ADVANCED MICRO DEVICES)

Specifications of AM79C973BKC

• Lead Free Status / Rohs Status: Not Compliant

Decoder
The decoder performs the 5B/4B decoding of the re-
ceived code-groups. The five bits of data are decoded
into four bits of nibble data. The decoded nibble is then
PCS Code-Group
1 1 1 1 0
0 1 0 0 1
1 0 1 0 0
1 0 1 0 1
0 1 0 1 0
0 1 0 1 1
0 1 1 1 0
0 1 1 1 1
1 0 0 1 0
1 0 0 1 1
1 0 1 1 0
1 0 1 1 1
1 1 0 1 0
1 1 0 1 1
1 1 1 0 0
1 1 1 0 1
1 1 1 1 1
1 1 0 0 0
1 0 0 0 1
0 1 1 0 1
0 0 1 1 1
0 0 1 0 0
0 0 0 0 0
0 0 0 0 1
0 0 0 1 0
0 0 0 1 1
0 0 1 0 1
0 0 1 1 0
0 1 0 0 0
0 1 1 0 0
1 0 0 0 0
1 1 0 0 1
Table 9. Decoder Code-Group Mapping
Name
A
B
C
D
E
K
R
H
V
V
V
V
V
V
V
V
V
V
0
1
2
3
4
5
6
7
8
9
F
T
J
I
P R E L I M I N A R Y
Am79C973/Am79C975
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
RXD[3:0]
0 0 0 0
0 0 0 1
0 0 1 0
0 0 1 1
0 1 0 0
0 1 0 1
0 1 1 1
1 0 0 0
1 0 0 1
1 0 1 0
1 0 1 1
1 1 0 0
1 1 0 1
1 1 1 0
1 1 1 1
0 1 0 1
0 1 0 1
0 1 10
forwarded to the PCS Control block to be sent across
the internal MII to the MAC unit. The code-group de-
coding is shown in Table 9.
End-of-Stream Delimiter, Part 1 of 2; always
End-of-Stream Delimiter, Part 2 of 2; always
Transmit Error; used to force signaling errors
Start-of-Stream Delimiter, Part 1 of 2;
Start-of-Stream Delimiter, Part 2 of 2;
IDLE; used as Inter-Stream fill code
always used in pairs with K
always used in pairs with J
used in pairs with R
used in pairs with T
Interpretation
Invalid Code
Invalid Code
Invalid Code
Invalid Code
Invalid Code
Invalid Code
Invalid Code
Invalid Code
Invalid Code
Invalid Code
Data C
Data D
Data A
Data B
Data E
Data F
Data 0
Data 1
Data 2
Data 3
Data 4
Data 5
Data 6
Data 7
Data 8
Data 9
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