Register Descriptions

13.4.7.1.14PHY Specific Status Register PSSTAT (17d; R)

Table 13-33. PHY Specific Status Register Bit Description

Field

Bit(s)

 

Description

Mode

HW Rst

SW Rst

 

 

 

 

 

 

 

Jabber (real time)

0

1b

= Jabber.

RO

0b

Retain

0 = No jabber.

 

 

 

 

 

 

 

 

 

 

 

 

Polarity (real time)

1

1b

= Reversed.

RO

0b

0b

0b

= Normal.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1b

= Receive pause enabled.

 

 

 

 

 

0b

= Receive pause disabled.

 

 

 

 

 

The Receive Pause Enable bit is valid

 

 

 

Receive Pause

2

only after the Speed and Duplex

RO

0b

0b

Resolved bit (11) is set. This occurs

Enable

 

when Auto-Negotiation is completed or

 

 

 

 

 

 

 

 

 

 

Auto-Negotiation is disabled.

 

 

 

 

 

This is a reflection of the MAC pause

 

 

 

 

 

resolution.

 

 

 

 

 

 

 

 

 

 

 

 

1b

= Transmit pause enabled.

 

 

 

 

 

0b

= Transmit pause disabled.

 

 

 

Transmit Pause

3

The Transmit Pause Enable bit is valid

RO

0b

0b

only after the Speed and Duplex

Enabled

 

Resolved bit (11) is set. This occurs

 

 

 

 

 

 

 

 

 

 

when Auto-Negotiation is completed or

 

 

 

 

 

Auto-Negotiation is disabled.

 

 

 

 

 

 

 

 

 

 

Energy Detect Status

4

0b

= Active

RO

0b

0b

1b

= Sleep

 

 

 

 

 

 

 

 

 

 

 

 

Downshift Status

5

1b

= Downshift.

RO

0b

0b

0b

= No Downshift.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1b

= MDI-X.

 

 

 

 

 

0b

= MDI.

 

 

 

MDI Crossover

6

The MDI Crossover Status bit is valid

RO

0b

0b

only after the Speed and Duplex

Status

 

Resolved bit (11) is set. This occurs

 

 

 

 

 

 

 

 

 

 

when Auto-Negotiation is completed or

 

 

 

 

 

Auto-Negotiation is disabled.

 

 

 

 

 

 

 

 

 

 

 

000b = < 50 m.

 

 

 

 

 

001b = 50 80 m.

 

 

 

 

 

010b = 80 110 m.

 

 

 

Cable Length

 

011b = 110 140 m.

 

 

 

9:7

100b = >140 m.

RO

000b

000b

(100/1000 modes

Cable length measurement is only a

only)

 

 

 

 

 

 

rough estimate. The actual value

 

 

 

 

 

depends on the attenuation of the cable,

 

 

 

 

 

output levels of the remote transceiver,

 

 

 

 

 

connector impedance, etc.

 

 

 

 

 

 

 

 

 

 

Link (real time)

10

1b

= Link up.

RO

0b

0b

0b

= Link down.

 

 

 

 

 

 

 

 

 

 

 

 

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