Any resources on using low power modes on Kintetis MKL24 with MQX Lite and PE drivers?

[mroczeks]

Hi, I am trying to use low power modes in my Kinetis MKL24 MQX-Lite based application. I am specially interested  in using ProcessorExpert drivers to do that.

I have looked for many resources (application notes, reference manuals, user guides) but found only information how to use low power with MQX (not MQX Lite) and without PE drivers :smileysad:

In MQX-Lite api visible in ProcessorExpert driver I cannot find any _lpm... functions.

Please advise on any resources...

[Petr_H]

Hi,

There are some useful tips and information related to KL25 FRDM board at MCU on Eclipse blog: Tutorial: Using the FRDM-KL25Z as Low Power Board | MCU on Eclipse

Could you write more details what does you application do? (e.g. if you use adc, dac, communcation etc..) What would you like to achieve? What hardware are you using?

best regards

Petr Hradsky

Processor Expert Support Team

[mroczeks]

I know MCU on Eclipse blog but that particular article does not hanlde with MQX Lite RTOS.

I use MKL24Z64VFM4 MCU. It communicates with several sensor chips over common I2C bus.

It also communicates over USB port (I use Freescale's USB Stack CDC driver).

To be able to run USB I need to have FLL or PLL enabled and Core clock set to at least 20MHz.

This is making my device consuming too much current.

I am thinking about making two clock configurations in ProcessorExpert and use one for USB communication and the other for low power operation.

I am not sure if my application will be able to detect USB connection in this low power clock configuration (either BLPI or BLPE configuration).