Alan B. Pearce wrote:

>> Is there any other PIC that has 4 (or more) independent PWM channels? 
> 
> I think some of the 18F may also, but I believe you can only use these
> for motor driving, and not as independent channels. 

There are a number of PICs with 4 and more semi-independent PWM channels.
Look for numbers of (E)CCP modules. They are independent in that you can
run every (E)CCP module with a different duty cycle, but they are not fully
independent in the selection of PWM frequencies -- you only have one or at
most two different frequencies. (The 18F6722 is one with 5 (E)CCP channels
that can be driven from two different timer sets.)

But as others have said before, for two motors you only need two PWM
channels, a few standard digital outputs (for direction and possibly
breaking) and a bit of glue logic. 

Gerhard

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