I have designed a custom board with msp430fr6877.
Start debug with the example code for RTC.
The code stuck with LFXT fault flag.
Later I checked with scope at LFXTIN and LFXTOUT but there was nothing, no oscillation atall. Only some hundred milivolt dc voltage.
Whereas in msp430fr6898 board these points show 32.768khz sinusoidal wave withe same probe and settings.
Now what could be the issue
1. Wrong loading cap and crystal combination
2. Damaged crystal
3. Damaged IC
- 4. Bad soldering (when I activate lcd segment on this line I see 300hz sq wave, which says no bad soldering)