PIC16F1947......gives 4 PWMs?

[treez]

We are using PIC16F1947 in our LED Lamp. Our remote software guy programs it for us. It gives us one PWM dimming stream at the moment

We now need 4 independently controlled PWM streams. Can this microcontroller give us this?

PIC16F1947
https://ww1.microchip.com/downloads/en/DeviceDoc/40001414E.pdf

 

[hexreader]

Looks as if only 3 timers are available for PWM.

If "independent" means 4 different frequencies, then you may be out of luck.

If two or more PWMs can be at the same frequency but different duty cycles, then all is well.

Don't have that chip, so can't prove it for sure, but that is how I read the datasheet.

 

[Aussie Susan]

Try https://www.microchip.com/ParamChartSearch/Chart.aspx?branchID=30048 (the Microchip 8-bit parametric search page) and find all of the MCUs that have 4 (or more) PWMs along with any other characteristics that you need.
Susan

 

[treez]

Thanks, from the search ony three micros have 4 pwm's...and they dont have enough pins, (only 8) we need a good 24 pins.
The pwms can be the same frequency.
I wonder if we should just stick with the pic16f1947?

 

[KlausST]

Hi,

What PWM frequency? And what duty cycle resolution?
Maybe software PWM is a solution...

Klaus

 

[Aussie Susan]

Thanks, from the search ony three micros have 4 pwm's...and they dont have enough pins, (only 8) we need a good 24 pins.

That's odd because when I select the "Max # PWM Outputs (including complimentary outputs)" field values from 4 to 28, I can count over 50 devices still selected. Selecting the "Pin Count" field from 20 to 64 still leaves 39 possible devices. Just selecting 28 pin devices (there are no 24-pin devices listed after the PWM selection) shows 11 devices.
Susan