Brad Mitchell wrote: > Is my understanding correct? Or am I unable to > output a frequency to a prot bit, based on an interger > divisor of clock/4 from the timer by just setting up some > registers? Brad: Sorry... You can't do that with any of the 16C5x parts. If you use a 16C58, your software will have to manually poll the RTCC/TMR0 register and toggle the port pin whenever it sees a rollover. -Andy Andrew Warren - fastfwd@ix.netcom.com Fast Forward Engineering, Vista, California http://www.geocities.com/SiliconValley/2499