Small Footprint RMII 10/100 Ethernet Transceiver with HP Auto-MDIX Support

Datasheet

Table 5.22 Register 1 - Basic Status (continued)

ADDRESS

NAME

 

DESCRIPTION

MODE

DEFAULT

 

 

 

 

 

 

1.4

Remote Fault

1

= remote fault condition detected

RO/

0

 

 

0

= no remote fault

LH

 

 

 

 

 

 

 

1.3

Auto-Negotiate

1

= able to perform auto-negotiation function

RO

1

 

Ability

0

= unable to perform auto-negotiation function

 

 

 

 

 

 

 

 

1.2

Link Status

1

= link is up,

RO/

X

 

 

0

= link is down

LL

 

 

 

 

 

 

 

1.1

Jabber Detect

1

= jabber condition detected

RO/

X

 

 

0

= no jabber condition detected

LH

 

 

 

 

 

 

 

1.0

Extended

1

= supports extended capabilities registers

RO

1

 

Capabilities

0

= does not support extended capabilities registers

 

 

 

 

 

 

 

 

Table 5.23 Register 2 - PHY Identifier 1

ADDRESS

NAME

DESCRIPTION

MODE

DEFAULT

 

 

 

 

 

2.15:0

PHY ID Number

Assigned to the 3rd through 18th bits of the

RW

0007h

 

 

Organizationally Unique Identifier (OUI), respectively.

 

 

 

 

OUI=00800Fh

 

 

 

 

 

 

 

Table 5.24 Register 3 - PHY Identifier 2

ADDRESS

NAME

DESCRIPTION

MODE

DEFAULT

 

 

 

 

 

3.15:10

PHY ID Number

Assigned to the 19th through 24th bits of the OUI.

RW

30h

3.9:4

Model Number

Six-bit manufacturer’s model number.

RW

0Fh

 

 

 

 

 

3.3:0

Revision Number

Four-bit manufacturer’s revision number.

RW

DEVICE

 

 

 

 

REV

 

 

 

 

 

Table 5.25 Register 4 - Auto Negotiation Advertisement

ADDRESS

NAME

DESCRIPTION

MODE

DEFAULT

 

 

 

 

 

4.15

Next Page

1 = next page capable,

RO

0

 

 

0 = no next page ability

 

 

 

 

This Phy does not support next page ability.

 

 

 

 

 

 

 

4.14

Reserved

 

RO

0

 

 

 

 

 

4.13

Remote Fault

1 = remote fault detected,

RW

0

 

 

0 = no remote fault

 

 

 

 

 

 

 

4.12

Reserved

 

 

 

 

 

 

 

 

4.11:10

Pause Operation

00 = No PAUSE

R/W

00

 

 

01= Symmetric PAUSE

 

 

 

 

10= Asymmetric PAUSE toward link partner

 

 

 

 

11 = Both Symmetric PAUSE and Asymmetric

 

 

 

 

PAUSE toward local device

 

 

 

 

 

 

 

Revision 1.0 (05-28-09)

42

SMSC LAN8720/LAN8720i

 

DATASHEET