AC207-DS02-R datasheet(30/60 Pages) BOARDCOM

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AC207

Preliminary Data Sheet

07/08/02

B roa dcom

Page 20 Register Description

Document

AC207-DS04-405-R

INITIAL DEVICE CONFIGURATION REGISTER

Table 17: Initial Device Configuration Register

Name

Type

Address

Description

MII Configuration

R/W

Used to give the status of MII port. Default is set by pin.

Bit

Name

Type

Description

Default

15:12

Mode

Mode[3:0]

Digital Interface

MODE pins

0000

MII

0100

7-wire

Others

Reserved

(write clear enable)

Reserved

(MIB enable)

Reserved

Disable partition

R/W

1:disable partition function of MII interface

External transform

selection

R/W

1:external transform 1:1.25, 0:external transform 1:1 Ext pin

MIIB speed select

R/W

1:100M interface, 0:10M interface

Ext Pin

6:2

Switch debug

R/W

Selection control for debugging signals

00000

100M repeater partition

alternative

R/W

0: normal, un-partition a port only when data can be

transmitted out from the port for 560 bit-time without a

collision.

1: alternate, un-partition a port when data can be either

transmitted from the port or received from the port for

560 bit-time without a collision.

10M repeater partition al-

ternative

R/W

0: normal, un-partition a port when data can be either

transmitted from the port or received from the port for

560 bit-time without a collision.

1: alternate, un-partition a port only when data can be

received from the port for 560 bit-time without a colli-

sion

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