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/
CheckRTC.lib
- Committer:
- kenjiArai
- Date:
- 2014-11-01
- Revision:
- 2:8b6a8cfa173a
- Child:
- 3:921a09e41147
File content as of revision 2:8b6a8cfa173a:
http://developer.mbed.org/users/kenjiArai/code/CheckRTC/#01ddb8e35845