I learn programming in assembly language. Can anyone let me know if the following program will open RA2 port as outpu= t and there will=20 be voltage on that port RA2? Thanks #include "P16F628A.INC" ; Include header file=20 __CONFIG _INTOSC_OSC_NOCLKOUT org 0 bsf STATUS,RP0 ;bank1 BCF TRISA,2 bcf STATUS,RP0 ;bank0 BSF PORTA,2 END I expect _INTOSC_OSC_NOCLKOUT will cause PIC16F628A to use internal oscilat= or, so=20 that no external crystal is not needed Thanks L. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .