8-bit MicrocontrollersのトピックRe: PWM resolution vs frequency

PWM resolution vs frequency

PW_CTL — Tue, 18 Oct 2011 14:29:36 GMT

Hi,

I see a relation between frequency and resolution in the PWM module. Is there any equation for this with a S08SH? Any way to know how many time I need to reach a desired resolution?

I would like to generate a 200KHz PWM with more than 8 bits resolution, is it possible directly with a S08SH?

Thanks.

Re: PWM resolution vs frequency

bigmac — Tue, 18 Oct 2011 17:09:22 GMT

Hello,

To achieve 8-bit PWM resolution at 200kHz frequency would require a TPM clock frequency of 256 * 200 kHz, or 51.2 MHz. This is clearly not feasible with 8-bit MCU devices.

Regards,

Mac

Re: PWM resolution vs frequency

PW_CTL — Tue, 18 Oct 2011 17:29:58 GMT

Ok, thanks for the aclaration.