78Q2120C データシートの表示（PDF） - Teridian Semiconductor Corporation

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78Q2120C

10/100BASE-TX Transceiver

Teridian Semiconductor Corporation 

78Q2120C

10/100BASE-TX

Transceiver

MR5: Auto-Negotiation Link Partner Ability Register

BIT

5.15

5.14

5.13

5.12:5

5.4:0

SYMBOL

NP

ACK

RF

A7:0

S4:0

TYPE

R

R

R

R

R

DEFAULT DESCRIPTION

0

Next Page: When ‘1’ is read, it indicates the link partner wishes to

engage in Next Page exchange.

0

Acknowledge: When ‘1’ is read, it indicates the link partner has

successfully received at least 3 consecutive and consistent FLP

bursts.

0

Remote Fault: When ‘1’ is read, it indicates the link partner has a

fault.

0

Technology Ability Field: This field contains the technology ability of

the link partner. The bit definition is the same as MR4.12:5.

00h Selector Field: This field contains the type of message sent by the

link partner. For IEEE 802.3 compliant link partner, this field should

be ‘00001’.

MR6: Auto-Negotiation Expansion Register

BIT

6.15:5

6.4

6.3

6.2

6.1

6.0

SYMBOL

RSVD

PDF

LPNPA

NPA

PRX

LPANEG

A

TYPE

R

RC

R

R

RC

R

DEFAULT DESCRIPTION

0

Reserved

0

Parallel Detection Fault: When ‘1’ is read, it indicates that more than

one technology has been detected during link up. This bit is cleared

when read.

0

Link Partner Next Page Able: When ‘1’ is read, it indicates the link

partner supports the Next Page function.

0

Next Page Able: Reads ‘0’ since the 78Q2120C does not support

Next Page function.

0

Page Received: Reads ‘1’ when a new link code word has been

received into the Auto-Negotiation Link Partner Ability Register. This

bit is cleared upon read.

0

Link Partner Auto-Negotiation Able: When ‘1’ is read, it indicates the

link partner is able to participate in the Auto-Negotiation function.

Page: 15 of 35

© 2009 Teridian Semiconductor Corporation

Rev 1.3

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