Integrated Circuit and Its Reset Circuit

Abstract

The present invention provides an integrated circuit and its reset circuit. The integrated circuit reset circuit includes a control switch, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor and a voltage comparison device. The resistance value of the resistor satisfies the formula When the control switch is turned off, since the voltage value on the fifth resistor is greater than or equal to the voltage value on the third resistor, that is, the voltage at the non-inverting input terminal of the voltage comparator is greater than or equal to the voltage at the inverting input terminal, the voltage comparator outputs a high-level signal , the I / O pin in the integrated circuit performs its own function. When the control switch is closed, the voltage value on the fifth resistor is smaller than the voltage value on the third resistor, that is, the voltage at the non-inverting input terminal of the voltage comparator is smaller than the reverse input terminal voltage, the comparison device outputs a low-level reset signal, and the I / O pin in the integrated circuit performs a reset function, realizing the multiplexing of the function of the I / O pin itself and the reset function, and saving the I / O pins of the integrated circuit.

Description

technical field [0001] The invention relates to the technical field of integrated circuits, in particular to integrated circuits and reset circuits thereof. Background technique [0002] An integrated circuit is a tiny electronic device or component. Using a certain process, the transistors, diodes, resistors, capacitors, inductors and other components required in a circuit are interconnected together, fabricated on a small or several small semiconductor wafers or dielectric substrates, and then packaged in a tube. Inside the shell, become a microstructure with the desired circuit function. [0003] The development of integrated circuits is very rapid. For digital integrated circuits, the initial state must be determined, so the integrated circuit reset circuit becomes very important. In existing integrated circuits, it is often necessary to use a specific I / O pin to implement the chip's external pin reset action, which will cause waste of chip I / O pins to a certain extent...

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to provide an integrated circuit reset circuit to realize the reset action of the external pin of the chip by using an I / O pin separately for the general integrated circuit, resulting in the waste of I / O pins. The multiplexing of the function of the / O pin itself and the reset function saves the I / O pins of the integrated circuit

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