Part Number:TMS320F28335
Hello,
In our application we need to control 8 stepper motors and 4 fans (with PWM inputs). In order to avoid wasting CPU time we are trying to control these outputs with PWM. I know that the F28335 has 12 PWM outputs, and on the 2nd revision of our board I connected all such signals to GPIOs 0-11 which are the I/Os associated with the PWM channels. After further reading of the datasheet it appears that there are only 6 PWM channels, and both outputs on each channel are "tied together." I.e. you can't drive GPIO 0/1 at different frequencies since they are both connected to PWM channel 1.
Is there anything I overlooked that would allow us to drive these motors without using CPU time? The fans are not so important as the steppers, so our minimum requirement is 8 independent PWM channels.
Thanks for any advice!