Eduardo Garcia wrote : > Hi all, > Follow a simple question... > > ... what's the maximum crystal to be > used with PIC16F873A I/SP. **Read** the data sheet, everything is there. Look for "Oscillator Configurations". (or something similar) Jan-Erik. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist