The reset button, also known as the reset button, exists in the host computer, notebook computer, smart phone, smart PDA or other electronic products. Because of its function, its position is generally hidden and difficult to touch.
1. The function of the reset key is to press this key when the electronic product or computer crashes, so that it can be restarted without interruption. When the warm restart (Ctrl+Alt+Del) is abnormal, the reset key is used as a cold start, that is, to restart the computer and self-check the memory data. The reset key is used for hard restart. Press the reset button when the keyboard and mouse can't move.
2. At the same time, press CTRL+ALT+DEL on the computer keyboard to reset, which belongs to soft reset, also called hot start.
Extended data:
Working principle of reset key:
The reset key is started after clearing the current CPU and running data. It does not involve power failure.
All reset signals on the motherboard are generated by the chipset, mainly by the South Bridge (with reset system controller inside) or the reset generator (74H series chips), which means that all devices and modules on the motherboard need to be reset by the South Bridge. If South Bridge wants to generate a reset signal or South Bridge wants to reset other devices and modules.
It needs to reset itself or have its own reset source first. The reset source of South Bridge is the gray line of ATX power supply (the gray line is 5v in normal state and 5V after work, and the gray line of ATX power supply is also PG signal), or the PG signal sent by the system power management chip.
First, after the power supply is started, the ATX power supply sends out the power supply normal signal PWRER OK, that is, ATX PWRGD, which is shaped by the inverter HCT 14, and then outputs the CLROFF signal, which enters the South Bridge 8237 1 to clear its internal register, and at the same time inputs the NAND gate HC 132. When the voltage reaches the rated value and is stable, the voltage control chip sends out VRMPWRGD signal.
Similarly, input VHC 132, and these two signals enter VHC 132X logic operation. After being shaped by HCT 14, the output signal is output to the south bridge by PIN 10 of HCT 14. Because the gray line powered by ATX will have a delay process at the moment of power supply, this delay process is equivalent to the yellow line.