DM9161 datasheet(23/47 Pages) ETC

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DM9161

10/100 Mbps Fast Ethernet Physical Layer Single Chip Transceiver

Final

Version: DM9161-DS-F02

May 10,2002

0.8

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

0.7

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

0.6-0.0

Reserved

0,RO

Reserved

Read as 0, ignore on write

8.2 Basic Mode Status Register (BMSR) - 01

Bit

Bit Name

Default

Description

1.15

100BASE-T4

0,RO/P

100BASE-T4 Capable

1 = DM9161 is able to perform in 100BASE-T4 mode

0 = DM9161 is not able to perform in 100BASE-T4 mode

1.14

100BASE-TX

full-duplex

1,RO/P

100BASE-TX Full Duplex Capable

1 = DM9161 is able to perform 100BASE-TX in full duplex mode

0 = DM9161 is 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 = DM9161 is able to perform 100BASE-TX in half duplex mode

0 = DM9161 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 = DM9161 is able to perform 10BASE-T in full duplex mode

0 = DM9161 is not able to perform 10BASE-TX in full duplex mode

1.11

10BASE-T

half-duplex

1,RO/P

10BASE-T Half Duplex Capable

1 = DM9161 is able to perform 10BASE-T in half duplex mode

0 = DM9161 is not able to perform 10BASE-T in half duplex mode

1.10-1.7

Reserved

0,RO

Reserved

Read as 0, ignore on write

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

0, RO/LH Remote Fault

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

reset). Fault criteria and detection method is DM9161 implementation

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

0 = No remote fault condition detected

1.3

Auto-negotiation

ability

1,RO/P

Auto Configuration Ability

1 = DM9161 is able to perform auto-negotiation

0 = DM9161 is not able to perform auto-negotiation

1.2

Link status

0,RO/LL

Link Status

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