DM9302 datasheet(39/64 Pages) DAVICOM

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DM9302

10/100Mbps Ethernet Fiber/Twisted Pair Media Converter with Local bus

Preliminary datasheet

DM9302-15-DS-P01

July 30, 2009

Collision test

0,RW

Collision Test

1 = Collision test enabled. When set, this bit will cause the COL

signal to be asserted in response to the assertion of TX_EN in

internal MII interface.

0 = Normal operation

6-0

Reserved

0,RO

Reserved

Read as 0, ignore on write

8.2 Basic Mode Status Register (BMSR) – 01H

Bit

Bit Name

Default

Description

100BASE-T4

0,RO/P

100BASE-T4 Capable

1 = DM9302 is able to perform in 100BASE-T4 mode

0 = DM9302 is not able to perform in 100BASE-T4 mode

100BASE-TX

full-duplex

1,RO/P

100BASE-TX Full Duplex Capable

1 = DM9302 is able to perform 100BASE-TX in full duplex mode

0 = DM9302 is not able to perform 100BASE-TX in full duplex mode

100BASE-TX

half-duplex

1,RO/P

100BASE-TX Half Duplex Capable

1 = DM9302 is able to perform 100BASE-TX in half duplex mode

0 = DM9302 is not able to perform 100BASE-TX in half duplex

mode

10BASE-T

full-duplex

1,RO/P

10BASE-T Full Duplex Capable

1 = DM9302 is able to perform 10BASE-T in full duplex mode

0 = DM9302 is not able to perform 10BASE-TX in full duplex mode

10BASE-T

half-duplex

1,RO/P

10BASE-T Half Duplex Capable

1 = DM9302 is able to perform 10BASE-T in half duplex mode

0 = DM9302 is not able to perform 10BASE-T in half duplex mode

10-7

Reserved

0,RO

Reserved

Read as 0, ignore on write

MF preamble

suppression

1,RO

MII Frame Preamble Suppression

1 = PHY will accept management frames with preamble suppressed

0 = PHY will not accept management frames with preamble

suppressed

Auto-negotiation

Complete

0,RO

Auto-negotiation Complete

1 = Auto-negotiation process completed

0 = Auto-negotiation process not completed

Remote fault

0, RO

Remote Fault

1 = Remote fault condition detected (cleared on read or by a chip

reset). Fault criteria and detection method is DM9302

implementation specific. This bit will set after the RF bit in the

ANLPAR (bit 13, register address 05) is set

0 = No remote fault condition detected

Auto-negotiation

ability

1,RO/P

Auto Configuration Ability

1 = DM9302 is able to perform auto-negotiation

0 = DM9302 is not able to perform auto-negotiation

Link status

0,RO

Link Status

1 = Valid link is established (for either 10Mbps or 100Mbps

operation)

0 = Link is not established

The link status bit is implemented with a latching function, so that

DM9302 Datasheet(PDF) 39 Page - Davicom Semiconductor, Inc.

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