AM79C873 datasheet(21/44 Pages) AMD

부품명	AM79C873

상세설명	NetPHY??-1 10/100 Mbps Ethernet Physical Layer Single-Chip Transceiver with 100BASE-FX Support

PDF	44 Pages

Scroll/Zoom	100%

제조업체	AMD [Advanced Micro Devices]

홈페이지	http://www.amd.com

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21 / 44 page

Am79C873

PRELIMINARY

Bit

Bit Name

Default

Description

0.9

Restart Auto-

Negotiation

0, RW/SC

Restart Auto-Negotiation:

1= Restart Auto-Negotiation.

0= Normal Operation

When this bit is set the Auto-Negotiation process is re-initiated. When

Auto-Negotiation is disabled (bit 12 of this register cleared), this bit has no

function and it should be cleared. This bit is self-clearing and will return a

value of 1 until Auto-Negotiation is initiated. The operation of the Auto-

Negotiation process will not be affected by the management entity that

clears this bit.

0.8

Duplex Mode

1, RW

Duplex Mode:

1= Full Duplex operation.

0= Normal operation

If Auto-Negotiation is disabled, setting this bit will cause the NetPHY-1

device to operate in Full Duplex mode. When Auto-Negotiation is enabled,

this bit reﬂects the duplex selected by Auto-Negotiation.

0.7

Collision Test

0, RW

Collision Test:

1= Collision Test enabled.

0= Normal Operation

When set, this bit will cause the COL signal to be asserted in response to

the assertion of TX_EN.

0.6

Reserved

0, RO

Reserved:

Write as 0, ignore on read.

Basic Mode Control Register (BMCR) -

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