DM9621 datasheet(30/66 Pages) DAVICOM

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DM9621

USB2.0 to Fast Ethernet Controller

Preliminary

Version: DM9621 -14-DS-P02

February 23, 2011

0 = Normal operation

6-0

RESERVED

0,RO

Reserved:

Write as 0, ignore on read

6.2 Basic Mode Status Register (BMSR) – 01H

Bit

Bit Name

Default

Description

100BASE-T4

0,RO/P

100BASE-T4 capable:

1 = Able to perform in 100BASE-T4 mode

0 = Not able to perform in 100BASE-T4 mode

100BASE-TX

full duplex

1,RO/P

100BASE-TX full duplex capable:

1 = Able to perform 100BASE-TX in full duplex mode

0 = Not able to perform 100BASE-TX in full duplex mode

100BASE-TX

half duplex

1,RO/P

100BASE-TX half duplex capable:

1 = Able to perform 100BASE-TX in half duplex mode

0 = Not able to perform 100BASE-TX in half duplex mode

10BASE-T

full duplex

1,RO/P

10BASE-T full duplex capable:

1 = Able to perform 10BASE-T in full duplex mode

0 = Not able to perform 10BASE-TX in full duplex mode

10BASE-T

half duplex

1,RO/P

10BASE-T half duplex capable:

1 = Able to perform 10BASE-T in half duplex mode

0 = Not able to perform 10BASE-T in half duplex mode

10-7

RESERVED

0,RO

Reserved:

Write as 0, ignore on read

MF preamble

suppression

0,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/LH

Remote fault:

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

reset). Fault criteria and detection method is PHY implementation

specific. This bit will set after the RF bit in the ANLPAR (bit 13,

0 = No remote fault condition detected

Auto-negotiation

ability

1,RO/P

Auto configuration ability:

1 = Able to perform auto-negotiation

0 = Not able to perform auto-negotiation

Link status

0,RO/LL

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

the occurrence of a link failure condition causes the link status bit to

be cleared and remain cleared until it is read via the management

interface

DM9621 Datasheet(PDF) 30 Page - Davicom Semiconductor, Inc.

DM9621 Datasheet(HTML) 30 Page - Davicom Semiconductor, Inc.

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