topic Re: Diable GPIO in UART pins in Kinetis Microcontrollers

Diable GPIO in UART pins

boominperera — Fri, 17 Nov 2017 04:54:55 GMT

Hi,

Does anyone know how I could disable the UART0 in pins (PTB1 and PTB2). I need to disable the UART0 entirely to go into LLS mode so that is very little current consumption.This is in the Frdm KL05Z board.

Thanks

Re: Diable GPIO in UART pins

mjbcswitzerland — Fri, 17 Nov 2017 18:23:43 GMT

Hi Boomin

If you add an internal pull-up to the UART Rx it should give you lowest power consumption (to avoid floating). Driving an output in LLS mode should not be an issue.

Regards

Mark

Kinetis: http://www.utasker.com/kinetis.html

KL05
- http://www.utasker.com/kinetis/FRDM-KL05Z.html (with LLS mode reference)
- LLS Video on FRDM-KL05Z https://www.youtube.com/watch?v=iZEMRiDmHzw&feature=youtu.be

Re: Diable GPIO in UART pins

boominperera — Sun, 19 Nov 2017 21:11:43 GMT

Hi Mark,

It works, Thank you