CC2340R5: How to read the low frequency clock source?

Hello,

Thanks for the question.

I'll look into it and provide an update within 5 business days.

Thanks,
Toby

Hi Shuyang,

Shuyang Zhong said:

1. If the clock source is set to LFXT in SysConfig, but the 32kHz crystal is not installed, will CC2340 switch to internal RC automatically?

No. This is effectively a compile time configuration.

Shuyang Zhong said:

2. Which register can I use to read the actuall clock source for low frequency clock?

Try LFCLKSEL: https://dev.ti.com/tirex/content/simplelink_lowpower_f3_sdk_8_20_00_119/docs/driverlib/cc23x0r5/register_descriptions/CPU_MMAP/CKMD.html#LFCLKSEL

Thanks,
Toby