Kinetis MicrocontrollersのトピックUART Wakeup on KEA128

UART Wakeup on KEA128

pranav_prabhu — Sat, 01 Feb 2025 10:20:00 GMT

I would like to know how to wakeup MCU from stop mode using UART. I have configured RXEDGIE but it doesn't seem to work.

Re: UART Wakeup on KEA128

Alice_Yang — Thu, 06 Feb 2025 06:24:29 GMT

Hello @pranav_prabhu

Please confirm that there is indeed an active edge on the RxD pin.

It's a falling edge if RXINV = 0 and a rising edge if RXINV = 1.

Another suggestion is to refer to the low - power demo "FRDM_KEA128_PMC". First, confirm that it can work properly on your board, and then change the wakeup source.

Alice

Re: UART Wakeup on KEA128

pranav_prabhu — Mon, 10 Feb 2025 04:28:18 GMT

I tried this. It worked.