Hi, This code did the job for me. TRISC=0x01; PORTC=0x00; T1CON = 0x0E+ wakeP; // Setup timer TMR1H = wakeH; // Setup counter TMR1L = wakeL; PIR1 = 0x00; // Clear interrupt PIE1 |= 0x01; // Enable interrupt INTCON = 0x40; // Enable global interrupt T1CON = 0x0F; // Start timer #asm SLEEP #endasm Haavard At 13:28 12.05.98 +0200, you wrote: > Sorry, I send you a mail without too match information: >> >> Hello, > I'm trying to use the timer1 (TMR1) with the PIC16C73A, but I've >> some problems, >> I program the interrruption, and it works (T1CON=b'00001101') when I use >> the internal clock, but when I program the external one >> (T1CON=b'00001111') it never triggers the interruptions,does any one >> know why? >> > Ferran >> Bohigas i Daranas > More information: between the 11 and 12 pin, both are outputs. >I configured correctly the interrupts, because I tested using the TMR1 with >the internal clock, and it works. > ------------------------------------------------ HŒvard T¿rring ht@neo.no xplisit@neo.no simplisit@neo.no Norsk Elektro Optikk A/S Tel: +47 67974700 PoBox 384 Fax: +47 67974900 1471 SkŒrer http://www.neo.no Norway