L80223 LSI, L80223 Datasheet - Page 46

• Manufacturer Part Number: L80223
• Manufacturer: LSI

Specifications of L80223

• Lead Free Status / RoHS Status: Not Compliant

2.3.13 LED Drivers
2.3.13.1 LED Output Select Bits
2-28
When the PLED2n pin is programmed to be a collision detect output, it
is asserted LOW for 100 ms every time a collision occurs. The PLED2n
output is open drain with a pullup resistor and can drive an LED from
V
See
program the LED output pins to indicate various conditions.
The PLED[5:2]n outputs are open-drain with a pullup resistor and can
drive LEDs tied to V
pulldown driver transistors with a pullup resistor, so the PLED[1:0]n
outputs can drive LEDs tied to either V
The PLED[5:0]n outputs can be programmed through the MI serial port
Configuration register for the following functions:
The PLED[5:0]n outputs are programmed with the LED output select bits
(PLEDn_[1:0]) and the LED Normal Function select bits (LED_DEF[1:0])
in the MI serial port Configuration register.
There are four sets of output select bits in MI serial port Configuration
register, one set for each LED output pin:
The PLEDn_[1:0] bits program the outputs to operate in the following
modes:
Functional Description
DD
Normal Function
On
Off
Blink
PLED3_[1:0] control the PLED3n output
PLED2_[1:0] control the PLED2n output
PLED1_[1:0] control the PLED1n output
PLED0_[1:0] control the PLED0n output
or can drive another digital input.
Section 2.3.13, “LED Drivers,” page 2-28
Copyright © 2000, 2001, 2002 by LSI Logic Corporation. All rights reserved.
DD
. The PLED[1:0]n outputs have both pullup and
DD
or GND.
for more details on how to