LAN83C183 datasheet(49/113 Pages) SMSC

49 / 113 page

SMSC DS – LAN83C183

Rev. 12/14/2000

COL

Collision Output

COL is asserted HIGH when a collision between transmit and receive

data is detected.

DPLX

Full/Half Duplex Select Input

When the ANEG pin is LOW, the DPLX pin selects Half/Full Duplex

operation.

When the ANEG pin is HIGH, the DPLX pin is ignored and the

Half/Full Duplex operation is controlled from the Duplex Mode Select

bit (DPLX) in the MI serial port Control register or the AutoNegotiation

outcome.

No Connect

—

13 of the pins are not connected.

RESETn

Hardware Reset Input

Pullup I

RPTR

Repeater Mode Enable Input

The RPTR pin controls the device repeater operation.

SPEED

Speed Select Input

When the ANEG pin is LOW, the SPEED pin selects 10/100 Mbits/s

operation.

When the ANEG pin is HIGH, this pin is ignored and the speed is

determined from the Speed Select bit (SPEED) in the MI serial port

Control register or the

AutoNegotiation outcome.

DUPLX Pin

Meaning

HIGH

Full Duplex operation

LOW

Half Duplex operation

RESETn Pin

Meaning

HIGH

Normal

LOW

Device is in a reset state.

RPTR Pin

Meaning

HIGH

Repeater mode enabled

LOW

Normal operation

SPEED Pin

Meaning

HIGH

100 Mbits/s operation

LOW

10 Mbits/s operation

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