AM79C978VCSLASHW datasheet(154/261 Pages) AMD

154 / 261 page

154

Am79C978

will be governed by the LEDOUT

and LEDPOL values.

This bit is always read/write ac-

cessible. LEDDIS is cleared by

H_RESET and is not affected by

S_RESET or setting the STOP

bit.

100E

100 Mbps Enable. When this bit

is set to 1, a value of 1 is passed

to the LEDOUT bit in this register

when the Am79C978 controller is

operating at 100 Mbps mode.

This bit is always read/write ac-

cessible. 100E is cleared by

H_RESET and is not affected by

S_RESET or setting the STOP

bit.

11-10 RES

Reserved locations. Written and

read as zeros.

MPSE

Magic Packet Status Enable.

When this bit is set to 1, a value of

1 is passed to the LEDOUT bit in

this register when magic frame

mode is enabled and a magic

frame is detected on the network.

This bit is always read/write ac-

cessible. MPSE is cleared by

H_RESET and is not affected by

S_RESET or setting the STOP

bit.

FDLSE

Full-Duplex Link Status Enable.

Indicates the Full-Duplex Link

Test Status. When this bit is set,

a value of 1 is passed to the LED-

OUT signal when the Am79C978

controller is functioning in a Link

Pass state and full-duplex opera-

tion

enabled.

When

the

Am79C978 controller is not func-

tioning in a Link Pass state with

full-duplex operation being en-

abled, a value of 0 is passed to

the LEDOUT signal.

This bit is always read/write ac-

cessible. FDLSE is cleared by

H_RESET and is not affected by

S_RESET or setting the STOP

bit.

PSE

Pulse Stretcher Enable. When

this bit is set, the LED illumination

time is extended for each new oc-

currence of the enabled function

for this LED output. A value of 0

disables the pulse stretcher.

This bit is always read/write ac-

cessible. PSE is set to 1 by

H_RESET and is not affected by

S_RESET or setting the STOP

bit.

LNKSE

Link Status Enable. When this bit

is set, a value of 1 will be passed

to the LEDOUT bit in this register

in Link Pass state.

This bit is always read/write ac-

cessible. LNKSE is cleared by

H_RESET and is not affected by

S_RESET or setting the STOP

bit.

RCVME

Receive Match Status Enable.

When this bit is set, a value of 1 is

passed to the LEDOUT bit in this

tivity on the network that has

passed the address match func-

tion for this node. All address

matching modes are included:

physical, logical filtering, broad-

cast, and promiscuous.

This bit is always read/write ac-

cessible. RCVME is cleared by

H_RESET and is not affected by

S_RESET or setting the STOP

bit.

XMTE

Transmit Status Enable. When

this bit is set, a value of 1 is

passed to the LEDOUT bit in this

activity on the network.

This bit is always read/write ac-

cessible. XMTE is set to 1 by

H_RESET and is not affected by

S_RESET or setting the STOP

bit.

POWER

Power. When this bit is set to 1,

the device is operating in HIGH

power mode.

RCVE

Receive Status Enable. When

this bit is set, a value of 1 is

passed to the LEDOUT bit in this

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AM79C978VC/W 数据表(PDF) 154 Page - Advanced Micro Devices

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