4. In TOD Setting State, the following button functions are applied:
- [S2] Mode / Set, exit from setting state.
- [S3] Reset, move from current eld to the next eld.
- [S4] ST/SP, adjust the value of the eld in incrementing order,
wraps to the lowest possible when it reaches to the highest value.
Except for the seconds eld where it will be reset to 00 when being
adjusted..
- [S1] EL, no special function except for turning EL on.
5. The EL will activate during button press and will stay for 3
seconds after the key release.
MODE LOOP