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uPSD3234A Port 4 as GPIO

lars_f
Associate
Posted on January 10, 2005 at 06:03

uPSD3234A Port 4 as GPIO

1 REPLY 1
lars_f
Associate
Posted on May 17, 2011 at 12:05

Hello,

I want to use the port 4 as GPIO.

I define port 4 as GPIO in PSDsoft.

In my firmware, I change the port signal by

SETB/CLR 0C0H.x (x = P4.x)

But I found everytime I set P4.x to be Low,

there will be a High pulse (160ms) every 1.4 second.

It's the same for each pin of Port 4.

Does anyone know why?

Many thanks in advance.

Larz

[ This message was edited by: Larz on 10-01-2005 15:41 ]