2. Reset mode: RST is required to remain high for a period of time, which is usually realized by powering on the RC circuit or the dedicated power supply monitoring chip.
3. Status: It is in the running state, so the CPU starts working from address 0000h. ..
5 1 MCU reset at high level. If the RST pin remains high for two machine cycles, the internal register will be set to an appropriate value so that the system can be started in sequence, while the RST pin will remain low during normal operation.
Extended data:
The RST pin is a reset terminal, which is effective when it is high. Input high level at this pin for at least two consecutive machine cycles, and the microcontroller will reset. There is a Schmitt ST trigger inside the RST pin, which is used to shape the input signal and ensure the reliability of the internal reset circuit, so the external input signal does not necessarily need to be a digital waveform.
When in use, a pull-down resistor of about 8.2k2 is generally connected between this pin and VSS pin, and an electrolytic capacitor of about 10UF is connected between this pin and VCC pin, which can ensure automatic reset when power is on. Reset is also an operation to make the single chip microcomputer exit the low power consumption working mode and enter the normal state.
Baidu Encyclopedia-Reset Operation