Generate a 120Khz signal using the pic16F877a

[skimask]

DEFINE OSC 8
TRISC.2=0
PWM_STATUS VAR PORTC.2
MAIN:
HIGH PWM_STATUS
PAUSEUS 4
LOW PWM_STATUS
PAUSEUS 4
GOTO MAIN
END
total time per cycle=4u+4u=8us...so...f=125khz...i hope this will work.i will tested it today...

Except that it'll take at least one cycle to set the pin high (probably 2), one cycle to set the pin low (probably 2), 2 cycles to execute the GOTO MAIN...
And if you'd read your PBP manual, you'd notice that pauseus has a minimum delay of 12us vs. the 4us you want.
Therefore, you're code will probably output a 50% duty cycle square wave at about 66.6Khz...give or take...

And do you want actual PWM or just a 120Khz pulse? 2 totally different things you know...