WJLXT971ALE.A4-857346 Cortina Systems Inc, WJLXT971ALE.A4-857346 Datasheet - Page 46
WJLXT971ALE.A4-857346
Manufacturer Part Number
WJLXT971ALE.A4-857346
Description
Manufacturer
Cortina Systems Inc
Datasheet
1.WJLXT971ALE.A4-857346.pdf
(96 pages)
Specifications of WJLXT971ALE.A4-857346
Lead Free Status / RoHS Status
Compliant
- Current page: 46 of 96
- Download datasheet (2Mb)
LXT971A PHY
Datasheet
249414, Revision 5.2
13 September 2007
5.7.3.1.1
Table 15
Cortina Systems
Preamble Handling
When the MAC asserts TX_EN, the PCS substitutes a /J/K symbol pair, also known as the
Start-of-Stream Delimiter (SSD), for the first two nibbles received across the MII. The PCS
layer continues to encode the remaining MII data, following the 4B/5B coding in
until TX_EN is de-asserted. It then returns to supplying IDLE symbols to the line driver.
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
LXT971A 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
Table
Page 46
15,
Related parts for WJLXT971ALE.A4-857346
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Manufacturer:
Cortina Systems Inc
Datasheet:
Part Number:
Description:
Manufacturer:
Cortina Systems Inc
Datasheet:
Part Number:
Description:
Manufacturer:
Cortina Systems Inc
Datasheet:
Part Number:
Description:
Manufacturer:
Cortina Systems Inc
Datasheet:
Part Number:
Description:
Manufacturer:
Cortina Systems Inc
Datasheet:
Part Number:
Description:
IC ETH MAC SPI3 4-PORT 552-FCBGA
Manufacturer:
Cortina Systems Inc
Datasheet:
Part Number:
Description:
IC ETH MAC SPI3 4PORT 552-BGA
Manufacturer:
Cortina Systems Inc
Datasheet:
Part Number:
Description:
IC ETHERNET MAC 10PORT 552-CBGA
Manufacturer:
Cortina Systems Inc
Datasheet:
Part Number:
Description:
IC ETHERNET MAC 10-PORT 552-BGA
Manufacturer:
Cortina Systems Inc
Datasheet:
Part Number:
Description:
IC ETH MAC 12-PORT 1152-UPBGA
Manufacturer:
Cortina Systems Inc
Datasheet:
Part Number:
Description:
IC ETH MAC 24-PORT COMM 672-BGA
Manufacturer:
Cortina Systems Inc
Datasheet:
Part Number:
Description:
IC ETH MAC 24-PORT 1152-UPBGA
Manufacturer:
Cortina Systems Inc
Datasheet:
Part Number:
Description:
IC ETH AGGREGATOR 4P 1024-BGA
Manufacturer:
Cortina Systems Inc
Datasheet:
Part Number:
Description:
IC ETH AGGREGATOR 4PORT 1024-BGA
Manufacturer:
Cortina Systems Inc
Datasheet:
Part Number:
Description:
IC ETH AGGREGATOR 4P 1369-BGA
Manufacturer:
Cortina Systems Inc
Datasheet: