80221 datasheet(6/91 Pages) LSI

6 / 91 page

80220/80221

MD400159/E

Programmable LED Output/Management Interface Address Input. The default func-

tion of this pin is to be a 100 Mbps Link Detect output. This pin can also be programmed

through the MI serial port to indicate other events or be user controlled. This pin can drive

an LED from VCC.

When programmed as 100 Mbps Link Detect Output (default):

1= No Detect

0 = 100 Mbps Link Detected

During powerup or reset, this pin is high impedance and the value on this pin is latched in

as the physical device address MDA3 for the MI serial port.

Programmable LED Output/Management Interface Address Input. The default func-

tion of this pin is to be an Activity Detect output. This pin can also be programmed through

the MI serial port to indicte other events or be user controlled. This pin can drive an LED

from VCC.

When programmed as an Activity Detect Output (default):

1 = No Activity

0 = Transmit Or Receive Packet Occurred, Hold Low for 100 mS

During powerup or reset, this pin is high impedance and the value on this pin is latched in

as the physical device address MDA2 for the MI serial port.

Programmable LED Output/Management Interface Address Input. The default func-

tion of this pin is to be a Full Duplex Detect output. This pin can also be programmed

through the MI serial port to indicate other events or be user controlled. This pin can drive

an LED from both VCC and GND.

When programmed as Full Duplex Detect Output (default).

1 = Half Duplex

0 = Full Duplex

During powerup or reset, this pin is high impedance and the value on this pin is latched in

as the physical address device address MDA1 for the MI serial port.

RX_ER /

Receive Error Output. This controller interface output is asserted active high when a

RXD4

coding or other specified errors are detected on the receive twisted pair inputs and it is

clocked out on falling edges of RX_CLK.

If the device is placed in the Bypass 4B5B Decoder mode, this pin is reconfigured to be the

fifth RXD receive data output, RXD4.

COL

Collision Output. This controller interface output is asserted active high when a collision

between transmit and receive data is detected.

MDC

Management Interface (MI) Clock Input. This MI clock shifts serial data into and out of

MDIO on rising edges.

MDIO

I/O

Management Interface (MI) Data Input/Output. This bidirectional pin contains serial MI

data that is clocked in and out on rising edges of the MDC clock.

MDINT

I/O

Management Interface Interrupt Output/Management Interface Address Input. This

(MDA4)

O.D.

pin is an interrupt output and is asserted active low whenever there is a change in certain

Pullup

MI serial port register bits, and deasserted after all changed bits have been read

out.

During powerup or reset, this pin is high impedance and the value on this pin is latched

in as the physical device address MDA4 for the MI serial port

PLED3

I/O

(MDA3)

O.D.

Pullup

PLED2

I/O

(MDA2)

O.D.

Pullup

PLED1

I/O

(MDA1)

Pullup

Pin Description continued

Pin#

I/O

Description

44L 64L

Name

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