>Hey!

>I have coded a program of LM35 sensor to display temperature on 7seg.
>My code worked fine on 16F877 but due to some bogus experiments i
>damaged 877 and got 877A.

>I programmed it well but my program on this doesn't work then i tried
>to  b'01010101' --> PORTB to check LED. It brightened LEDs for an
>instant when i put my finger on uC.

>My 877 config fuses are as follow:

>__CONFIG _XT_OSC & _CP_OFF & _LVP_OFF & _PWRTE_ON & _WDT_OFF

>is there any other fuse do i need to add ?

>Besides that im using 4Mhz crystal of previous experiment.

>Thanks
>X4ce

If the 877a seemed to work for a moment when putting
a finger on it it might just be the oscilator not working.
I would try the HS oscilator mode which has higher gain.
4Mhz is at the frequency where there is no clear choice of XT or HS mode
Peter van Hoof
-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist