Dear All,
I am trying to build PWM using PCA in P89C669,but there are problem regarding to O/P.I also used the cookbook for it and develop a program it goes well in mode 0 ,but when i'm trying it on mode 3 the o/p on DSO will not show squre wave it just like as a sine wave.For reference i;m send my code please suggest the proper solution as early as possible.

void init_pwm(void)

{
Pwm=1; // For alternate function
CMOD=0x02; // Clock input 4 250 nsec at 16 MHz
CL=0; //Frequency of output 4 15.6 KHz
CH=0;
// ; Module 0 in PWM mode
CCAP3L=0;
CCAP3H=0x80; // 50 percent duty cycle
CCAPM3=0x42;
CR=1; // Turn on PCA timer
}


thanks & regards
Mayur