Can I use watchdog timer? Where I should place watchdog reset instruction ? I use LPC20xx controllers and GCC. Best regards Jaromir

I think the LPC port uses timer 0 for the tick ISR, so the watchdog is free for your use with no problem. Where to put the watchdog code is an application design issue. http://www.embedded.com/showArticle.jhtml?articleID=9900990 http://www.embedded.com/showArticle.jhtml?articleID=9900931