MU9C8328A Ethernet Interface

Rev. 0.8 Draft

8

UPDATE OP-CODE REGISTER (1000)

Bit

Mnemonic

Description

15-0

UOC

Contains the Op-Code to be used for updating the time stamp on a SA match

Default is 0300H (NOP). To update time stamp write 0328H (MOV HM, CR) to this register.

FUNCTIONAL DESCRIPTION

Continued

STATUS REGISTER (0001)

Bit

Mnemonic

Description

15–8

Reserved.

7

COL

1 = Collision detected.

6

LOC

1 = Loss of carrier detected.

5

BUSY

1 = Network port is busy using the LANCAM.

4

MATCH

1 = A match was found.

3

FULL

1 = The LANCAM is full.

2

DAM

1 = A Destination Address match was found.

1

SAM

1 = A Source Address match was found.

0

REJECT

1 = The frame was rejected.

LEARN OP-CODE REGISTER (0010)

Bit

Mnemonic

Description

15–0 ALOC

Contains the Op-Code to be used for an auto-learn, if enabled. Default is 0334H

(MOV NF, CR, V), but can be overwritten.

Table 2: Register Descriptions

Continued

PURGE OP-CODE REGISTER (1001)

Bit

Mnemonic

Description

15-0

POC

Contains the Op-Code to be used for the purge routine. Default is 043DH (VBC ALM,E).

TIME STAMP REGISTER (1010)

Bit

Mnemonic

Description

15-8

NEW_TS

The value used for time stamp updates.

7-0

OLD_TS

The value used to purge old entries.