DM9620 datasheet(32/71 Pages) DAVICOM

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DM9620

USB2.0 to Fast Ethernet Controller

Preliminary

Version: DM9620 -15-DS-P02

February 20, 2012

Duplex mode

1,RW

Duplex mode:

1 = Full duplex operation. Duplex selection is allowed when

Auto-negotiation is disabled (bit 12 of this register is cleared). With

auto-negotiation enabled, this bit reflects the duplex capability

selected by auto-negotiation

0 = Normal operation

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

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-negotiatio

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-negotiatio

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)

DM9620 Datasheet(PDF) 32 Page - Davicom Semiconductor, Inc.

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