AM79C981 datasheet(15/40 Pages) AMD

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AMD

PRELIMINARY

1–85

Am79C981

Table 2. Management Port Command Summary

Commands

SI Data

SO Data

Set (Write) Opcodes

IMR+ Chip Programmable Options

0000 1CSA

Alternate AUI Partitioning Algorithm

0001 1111

Alternate TP Partitioning Algorithm

0001 0000

AUI Port Disable

0010 1111

AUI Port Enable

0011 1111

TP Port Disable

0010 0###

TP Port Enable

0011 0###

Disable Link Test Function (per TP port)

0100 0###

Enable Link Test Function (per TP port)

0101 0###

Disable Automatic Receiver Polarity Reversal (per TP port)

0110 0###

Enable Automatic Receiver Polarity Reversal (per TP port)

0111 0###

Get (Read) Opcodes

AUI Port Status (B, S, L Cleared)

1000 1111

PBSL 0000

TP Port Partitioning Status

1000 0000

C7...C0

Bit Rate Status of TP ports

1010 0000

E7...E0

Link Test Status of TP ports

1101 0000

L7...L0

Receive Polarity Status of all TP ports

1110 0000

P7...P0

MJLP Status

1111 0000

M000 0000

Version

1111 1111

XXXX 0001

AUI Port Status (S, L Cleared)

1000 1011

PBSL 0000

AUI Port Status (B Cleared)

1000 1101

PBSL 0000

AUI Port Status (None Cleared)

1000 1001

PBSL 0000

Notes:

1. Unused opcodes are reserved for future use.

2. ### is the port number (000 to 111 for TP0 to TP7)

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