// SA Clock A is the clock source for PWM channel 0
// SA Clock SA is the clock source for PWM channel 1
// SA Clock B is the clock source for PWM channel 2 // SA Clock B is the clock source for PWM channel 3
// SA Clock A is the clock source for PWM channel 4
// SA Clock A is the clock source for PWM channel 5
// SA Clock B is the clock source for PWM channel 6
// SA Clock B is the clock source for PWM channel 7