Can't save the time of the main board, board battery power supply is normal, every time after the restart, time to return to the factory Settings

CodePudding user response:

The software opens the RTC clock?

CodePudding user response:

Opened, all the board works, only this one is not normal

CodePudding user response:

Restart moment, whether to have single chip off electricity situation (power is not enough?

CodePudding user response:

reference whale niko reply: 3/f

restart moment, if there is a single chip off electricity situation (power is not enough?

No, the oscilloscope had been measured

CodePudding user response:

Two points:
1. Check the RTC power supply part would restart moment have change, RTC power supply for power supply and singlechip are separate,
2. Check whether MCU initialization to the storage, if storage function is not perfect, lead to single chip microcomputer to initialize the RTC

CodePudding user response:

, also can check the power circuit of the RTC have hardware without shock, had better take a good board, compare the two on the power and electricity, the waveform of the circuit

CodePudding user response:

If there's any impact breaker

CodePudding user response:

refer to 6th floor whale niko response:

you also can check, power outages, hardware circuit of the RTC presence of shock, had better take a good board, compare the two on the power and electricity, the waveform of the circuit

Ok, thanks, I check it

CodePudding user response:

fog oasis reference 7 floor response:

if there is impact breaker of

Crystals and voltage were measured, there is no impact breaker

CodePudding user response:

Restart the RAM is bound to be cleansed, to join hardware is needed in the RTC chip