AX88850

PRELIMINARY

ASIX ELECTRONICS CORPORATION

27

4.0 REGISTERS

The AX88850 has 128 16-bit registers which are separated into four pages with each page 32 words. At

power-on or reset , the default value is page 0 registers. The register page can be changed by writing to the register

address 1 on all the four pages .

4.1 Page 0 Register MAP

Address (hex)

Name

Access

Description

0

CONFIG

R/W

Set AX88850 configuration

1

PAGE

R/W

Selects register from page 0 to page 3.

2

PARTITION

RO

Indicates Auto-Partitioning status.(port0 - port9)

3

JABBER

RO

Indicates Jabber status. (port0 - port9)

4

ADMIN

R/W

Port enable / disable, administration control/status(port0 - port9)

5

DEVICE-ID

R/W

Accesses 1) the AX88850 ID number configured externally on the

RID[4:0] pins. 2) the last receiving port number.

The device number of AX88850 may be overwritten after it has been

latched at the end of reset.

6

Reserved

7

Reserved

8

P8-SE

R/W

Port 8 : 16-bit ShortEvent Counter (dedicated MII port 0)

9

P8-LE

R/W

Port 8 : 16-bit LateEvent Counter

A

P8-COL

R/W

Port 8 : 16-bit Collision Counter

B

P8-PART

R/W

Port 8 : 16-bit Auto-partition Counter

C

P9-SE

R/W

Port 9 : 16-bit ShortEvent Counter (dedicated MII port 1)

D

P9-LE

R/W

Port 9 : 16-bit LateEvent Counter

E

P9-COL

R/W

Port 9 : 16-bit Collision Counter

F

P9-PART

R/W

Port 9 : 16-bit Auto-partition Counter

10-13

P0-SE …

P0-PART

R/W

Port 0 management counters ( as per ports 8,9 as above )

14-17

P1-SE …

P1-PART

R/W

Port 1 management counters ( as per ports 8,9 as above )

18-1B

P2-SE …

P2-PART

R/W

Port 2 management counters ( as per ports 8,9 as above )

1C-1F

P3-SE …

P3-PART

R/W

Port 3 management counters ( as per ports 8,9 as above )