DP83953 datasheet(41/90 Pages) NSC

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5.0 HUB MANAGEMENT SUPPORT (Continued)

Packet Status Register 0

Packet Status Register 1

PCOMPD

resv

Bit

Symbol

Description

resv

Reserved for future use: This bit is currently undefined.

Management software should not examine the state of this bit.

PCOMPD

Packet Compression Done: If packet compression is utilized, this bit informs the user

that compression was performed, i.e., the packet was long enough to require

compression.

D(7:2)

A(5:0)

RIC2A Address (5:0): This address is defined by the user and is supplied when writing

to the RIC2A Address Register. It is used by hub management software to distinguish

between RIC2As in a multi-RIC2A system.

CRCER

FAE

COL

CLN

PA3

PA2

PA1

PA0

Bit

Symbol

Description

D(3:0)

PA(3:0)

Port Address: This field defines the port which is receiving the packet.

CLN

Clean Receive: This bit is asserted provided no collision activity occurs during

repetition of the source and destination address fields, and the packet is of sufficient

size to contain these fields.

COL

Collision: If a receive or transmit collision occurs during packet repetition the collision

bit is asserted.

FAE

Frame Alignment Error: This bit is asserted if a Frame Alignment Error occurred in

the repeated packet.

CRER

CRC Error: This bit is asserted if a CRC Error occurred in the repeated packet.

This status flag should not be tested if the COL bit is asserted since the error may be

simply due to the collision.

DP83953 Datasheet(PDF) 41 Page - National Semiconductor (TI)

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