AVR-Chat

You resistor value seems high. 
I use a 300 - 330 ohm resistor because a led needs 15 mAmps.  Ie 5V/330
= .015 amps



-----Original Message-----
From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] On
Behalf Of acemailone
Sent: Friday, May 13, 2005 11:12 PM
To: AVR-Chat@yahoogroups.com
Subject: [AVR-Chat] Blinking leds on PortA and PortB - ATmega163


I'm trying to blink some leds using an ATmega163. I have one led on 
PORTB.0 that goes to GND through a 4k7 resistor. This one works fine. A
second led on PORTA.0 going to GND doesn't blink. If I connect it to 
VCC, then is blinking.
I checked the datasheet of ATmega163 and I didn't see any difference for

ports A and B when they are configured as general I/O.
What could be the explanation?

Adrian



 
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