Input data state detection circuit with switch control

Abstract

The invention discloses an input data state detection circuit with switch control. The detection circuit comprises a bias circuit, a first threshold comparison unit and a second threshold comparison unit; wherein the bias circuit comprises two resistors connected in series, a node between the two resistors is connected with a data input interface, and the two resistors are separately connected with a switch on both sides of the node; the node is connected with first input ends of the first threshold comparison unit and the second threshold comparison unit; second input ends of the first threshold comparison unit and the second threshold comparison unit are separately connected with a threshold input interface, and output ends of the input ends of the first threshold comparison unit and the second threshold comparison unit are in one-to-one correspondence connection with two input ends of a gate circuit; and the input data state detection circuit disclosed by the invention compares input voltage signals of the data input interface and judges whether the input data of the data input interface are effective according to output data of the gate circuit so as to detect whether the input data of the data input interface are effective.

Description

technical field [0001] The invention relates to the field of integrated circuits, in particular to an input data state detection circuit with switch control. Background technique [0002] Since the invention of transistors in 1947, semiconductor technology has experienced several generations of silicon transistors, integrated circuits, ultra-large-scale integrated circuits, and very large-scale integrated circuits in the past 50 years. The components inside the computer that process data and control the processing process. With the rapid development of large-scale integrated circuit technology, the chip integration density is getting higher and higher. The CPU can be integrated on a semiconductor chip. This has the function of a central processing unit. Large-scale integrated circuit devices are collectively referred to as "microprocessors"; whether it is home appliances such as video recorders, smart washing machines, mobile phones, or automotive engine control, as well as ...

AI Technical Summary

Problems solved by technology

[0004] However, in the process of data transmission, the input interface of the interface chip will not be able to determine whether the input data of the interface chip is valid due to poor contact. At this time, the output interface of the interface chip will still output "0" or "1". signal, and transmit the signal to the microprocessor; however, due to the poor contact of the input interface, the input data of the interface chip cannot reflect the real data, so that the output data of the interface chip is meaningless

Images