5220-DS02-R datasheet(18/90 Pages) BOARDCOM

18 / 90 page

BCM5220

Preliminary Data Sheet

04/20/04

Broa d c om Co rp o r a t i o n

Page 6

MII Management

Document

5220-DS04-405-R

0101*

10001

Start-of-Stream Delimiter, Part 2

0000*

01101

End-of-Stream Delimiter, Part 1

0000*

00111

End-of-Stream Delimiter, Part 2

1000

00100

Transmit Error (used to force signalling errors)

0111

00000

Invalid Code

0111

00001

Invalid Code

0111

00010

Invalid Code

0111

00011

Invalid Code

0111

00101

Invalid Code

0111

00110

Invalid Code

0111

01000

Invalid Code

0111

011000

Invalid Code

0111

10000

Invalid Code

0111

11001

Invalid Code

* Treated as invalid code (mapped to 0111) when received in data field.

Table 2: Receive Error Encoding

Error Type

RXD[3:0]

Stream cipher error—descrambler lost lock

0010

Link failure

0011

Premature end of stream

0110

Invalid code

0111

Transmit error

1000

False carrier sense

1110

Table 1: 4B5B Encoding (Cont.)

Name

4B code

5B Code

Meaning

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