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Aduc7061 - Can you really set duty cycles on two PWMs independently?

Question asked by visualfor on Dec 15, 2010
Latest reply on Dec 16, 2010 by visualfor

Hello,

 

Aduc7061 rev B datasheet page 74 says:

 

Users have control over the period of each pair of outputs and over the duty cycle of each individual output.

 

But the same page on the second column shows a figure, and notes:

 

The low-side waveform, PWM1, goes high when the timer count reaches PWM0LEN, and it goes low when the timer count reaches the value held in PWM0COM2 or when the high-side waveform (PWM0) goes low.

 

I have an application, where I need two PWMs with same Frequrency (100Hz), but I must have ability to control their duty cycle independently. 

 

On my working prototype, I tried all sorts of possibilities (including invert) to make this happen - to no avail. 

 

The restriction that PWM1 falling edge must come before PWM0 falling edge - make it dependent to each other.

 

Do you guys know a trick that I can use to overcome that?

 


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