DM9102AT datasheet(43/77 Pages) ETC

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DM9102A

Single Chip Fast Ethernet NIC controller

Final

Version: DM9102A-DS-F03

August 28, 2000

0= Normal Operation

0.6:0.0

Reserved

<0000000>,

Reserved. Write as 0, ignore on read

Basic Mode Status Register (BMSR) – 1

Bit

Name

Default

Description

1.15

100BASE-T4

0,RO/P

100BASE-T4 Capable:

1=DM9102A is able to perform in 100BASE-T4 mode

0=DM9102A is not able to perform in 100BASE-T4 mode

1.14

100BASE-TX

Full Duplex

1,RO/P

100BASE-TX FULL DUPLEX CAPABLE:

1= DM9102A able to perform 100BASE-TX in Full Duplex mode

0= DM9102A not able to perform 100BASE-TX in Full Duplex mode

1.13

100BASE-TX

Half Duplex

1,RO/P

100BASE-TX Half Duplex Capable:

1=DM9102A is able to perform 100BASE-TX in Half Duplex mode

0=DM9102A is not able to perform 100BASE-TX in Half Duplex mode

1.12

10BASE-T

Full Duplex

1,RO/P

10BASE-T Full Duplex Capable:

1=DM9102A is able to perform 10BASE-T in Full Duplex mode

0=DM9102A is not able to perform 10BASE-T in Full Duplex mode

1.11

10BASE-T

Half Duplex

1,RO/P

10BASE-T Half Duplex Capable:

1=DM9102A is able to perform 10BASE-T in Half Duplex mode

0=DM9102A is not able to perform 10BASE-T in Half Duplex mode

1.10-1.7

Reserved

0000,RO

Reserved:

Write as 0, ignore on read

1.6

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

1.5

Auto-negotiation

Complete

0,RO

Auto-negotiation Complete:

1=Auto-negotiation process completed

0=Auto-negotiation process not completed

1.4

Remote Fault

RO/LH

Remote Fault:

1= Remote fault condition detected (cleared on read or by a chip reset). Fault

criteria and detection method is DM9102A 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

1.3

Auto-negotiation

Ability

1,RO/P

Auto Configuration Ability:

1=DM9102A able to perform Auto-negotiation

0=DM9102A not able to perform Auto-negotiation

1.2

Link Status

0,RO/LL

Link Status:

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

0=Link 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

1.1

Jabber Detect

RO/LH

Jabber Detect:

1=Jabber condition detected

0=No jabber

This bit is implemented with a latching function. Jabber conditions will set this

bit unless it is cleared by a read to this register through a management

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