This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

CC2640: Switching between Internal RC Oscillator and external 32kHz crystal

Expert 1410 points
Part Number: CC2640

Hello geeks,

My project is based on cc2640 mcu.

I have two modes in my project, ie Wakeup mode (uses 24MHz) and sleep mode(runs in 32kHz external oscillator). I need to use 32kHz ext. osc for wakeing up the controller from Sleep mode.

Initially when the device turns ON, the internal RC oscillator will have the control, is my understanding correct?

I would like to know where actually the switching from internal RC oscillator to external 32kHz oscillator is done( incase i have an ext 32kHz osc) ?

How do we check the stability (or tolerance) of the oscillator before switching from internal to ext. osc. ?

Waiting for the response asap.

Thanks in advance.