LPUART at Very Low Baud?

gbrowne — Fri, 20 Jul 2018 19:28:47 GMT

Hello.

I want to be able to run the LPUART at a very low baud rate (e.g. 4 bps).

I have an 8MHz oscillator running my S32K144, so it would seem that the lowest baud I would be able to get, by maxing out the SBR and OSR, is 8000000/8191/32 = 30.5 bps, which I have verified on my scope.

Is there any way I can drive that lower to get down into the 4 bps range?

Thanks,

-Greg

Re: LPUART at Very Low Baud?

dianabatrlova — Mon, 23 Jul 2018 11:40:24 GMT

Hi gbrowne,

It is possible to reduce source clock for the LPUART. So, for example, If you are using divider SOSCDIV2 you can divide 8 MHz by 64. After that can be calculated 125000/1250/25 = 4 bps.

I hope it helps you.

Best regards,

Diana

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LPUART at Very Low Baud?

Re: LPUART at Very Low Baud?