System Reset
According to the power structure of UC6580, there are two reset domains: Core domain and Backup domain.
Core domain can be reset by three methods:
- RESETN is the reset pin of the chip. When the voltage level at RESETN is low, the reset signal will be sent to the Core domain. The duration of RESETN low level should be more than 10 μs.
- The chip’s software reset, which is controlled by the firmware.
- Watchdog RESET.
If any of the above reset sources issues a reset signal, the Core domain is reset.
Backup domain can be reset by two methods:
- When the voltage of V_BACK is lower than 1.2 V, it will trigger the reset.
- The software system sends the RTC RESET signal, which is controlled by the firmware and only resets the RTC counter.