Check RTC LSE(External Xtal, 32.768kHz) mode
Please refer follow links.
My notebook
http://developer.mbed.org/users/kenjiArai/notebook/nucleo-series-clock-structure-and-xtal-oscillation/
Q&A for RTC Xtal
http://developer.mbed.org/questions/4531/RTC-External-Crystal-Nucleo/
mbed.bld
- Committer:
- kenjiArai
- Date:
- 2015-05-16
- Revision:
- 4:56a0cbad89b0
- Parent:
- 2:8b6a8cfa173a
File content as of revision 4:56a0cbad89b0:
http://mbed.org/users/mbed_official/code/mbed/builds/dbbf35b96557