LAN8820 Datasheet, PDF(52/83 Page) Microchip Technology – RGMII 10/100/1000 Ethernet Transceiver

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LAN8820 Datasheet, PDF (52/83 Pages) Microchip Technology – RGMII 10/100/1000 Ethernet Transceiver

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LAN8820/LAN8820I

4.2.22 PHY SPECIAL CONTROL / STATUS REGISTER

Index (In Decimal): 31

Size:

16 bits

Bits

Description

15:13

RESERVED

Auto-negotiation done indication

0 = Auto-negotiation is not done or disabled (or not active)

1 = Auto-negotiation is done

Note: This is a duplicate of register 1.5, however reads to register 31 do

not clear status bits.

11:5 RESERVED

4:2 Speed Indication

HCDSPEED value:

[001]=10Mbps Half-duplex

[101]=10Mbps Full-duplex

[010]=100BASE-TX Half-duplex

[110]=100BASE-TX Full-duplex

1:0 RESERVED

Type

Note 4-9 Set according to the results of Auto-Negotiation.

Default

Note 4-9

DS00001871B-page 52

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