5222-DS02-R datasheet(43/76 Pages) BOARDCOM

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Preliminary Data Sheet

BCM5222

7/20/04

Broadcom Corporation

Document 5222-DS02-405-R

100BASE-TX Receive Error Counter

Page 31

BAD ESD DETECTED

The PHY returns a 1 in bit 4 if an end of stream delimiter error has been detected since the last time this register was read.

Otherwise it returns a 0.

RECEIVE ERROR DETECTED

The PHY returns a 1 in bit 3 if a packet was received with an invalid code since the last time this register was read. Otherwise

it returns a 0.

TRANSMIT ERROR DETECTED

The PHY returns a 1 in bit 2 if a packet was received with a transmit error code since the last time this register was read.

Otherwise it returns a 0.

LOCK ERROR DETECTED

The PHY returns a 1 in bit 1 if the descrambler has lost lock since the last time this register was read. Otherwise it returns a 0.

MLT3 CODE ERROR DETECTED

The PHY returns a 1 in bit 0 if an MLT3 coding error has been detected in the receive data stream since the last time this

100BASE-TX RECEIVE ERROR COUNTER

RECEIVE ERROR COUNTER [15:0]

This counter increments each time the BCM5222 receives a non-collision packet containing at least one receive error. The

counter automatically clears itself when read. When the counter reaches its maximum value, FFh, it stops counting receive

errors until cleared.

Table 17: 100BASE-TX Receive Error Counter (Address 18d, 12h)

Bit

Name

R/W

Description

Default

15:0

Receive Error Counter [15:0]

R/W

Number of non-collision packets with receive errors

since last read

0000h

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