DJLXT972ALC.A4 Cortina Systems Inc, DJLXT972ALC.A4 Datasheet - Page 39
DJLXT972ALC.A4
Manufacturer Part Number
DJLXT972ALC.A4
Description
Manufacturer
Cortina Systems Inc
Datasheet
1.DJLXT972ALC.A4.pdf
(80 pages)
Specifications of DJLXT972ALC.A4
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LXT972A PHY
Datasheet
249186, Revision 5.2
13 September 2007
Table 15
Cortina Systems
In the receive direction, the PCS layer performs the opposite function, substituting two
preamble nibbles for the SSD. In 100 Mbps operation, preamble is always passed through
the PCS layer to the MII interface.
4B/5B Coding (Sheet 1 of 2)
®
1. The /I/ (Idle) code group is sent continuously between frames.
2. The /J/ and /K/ (SSD) code groups are always sent in pairs, and /K/ follows /J/.
3. The /T/ and /R/ (ESD) code groups are always sent in pairs, and /R/ follows /T/.
4. An /H/ (Error) code group is used to signal an error condition.
Code Type
CONTROL
LXT972A Single-Port 10/100 Mbps PHY Transceiver
DATA
IDLE
Undefined
Undefined
undefined
4B Code
3 2 1 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 0
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
Name
R
K
T
J
I
C
D
0
1
2
3
4
5
6
7
8
9
A
B
E
F
1
2
2
3
3
4 3 2 1 0
5B Code
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 0 0 0
1 0 0 0 1
0 1 1 0 1
0 0 1 1 1
1 1 1 11
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
Interpretation
5.7 100 Mbps Operation
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
Page 39
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