Detection parts and data of reset circuit

 (a) shows the structure of the microprocessor reset circuit. The power supply terminal of the microprocessor will have a process of rising from 0
to 5v when it is turned on. If it is started during this process, program confusion may occur. For this reason, microprocessors are equipped with a reset circuit
that resets the terminal at the moment of turning on the computer. Keep ov, low level . When the power supply is close to 5v (greater than 4.6 V). The voltage at the reset pin becomes high (nearly
5 V). Only then does the microprocessor start working. During shutdown, when the voltage value drops to less than 4.6 V, the reset voltage drops to zero and the microprocessor
program is reset to ensure the normal operation of the microprocessor . Figure 25-22 (b) shows the time relationship between the power supply voltage and the reset voltage.