Franck,
     
     Sounds like PB6 and 7 are floating or very high impedance. Have you 
     left PB7 and 6 as floating inputs? - what's connected to them?
     
        Steve Lawther


______________________________ Reply Separator _________________________________
Subject:      hands causing interrupt to PIC16C73
Author:  MIME:frougi01@UTOPIA.POLY.EDU at INTERNET-HUSKY
Date:    09/04/98 09:31


I have a hairy problem. I wrote a program that waits in a loop for an 
interrupt to be generated from PORTB pins. When debugging the software 
everything is fine. However, when testing the hardware some unpredictable 
errors occur. That is specifically when you come close with your hands to 
the circuit inputs (PORTB <7:6>), an interrupt is generated making the 
circuit go haywire.
If anyone had this problem before please some response will be readily 
appreciated.
     
     
Franck.
     
     
PS: Please use the same subject for mail sorting purposes. Thank you for 
your comprehension