Key input system

Abstract

This invention provides a key input system including a power supply part, a display part and a key input part connected with a master plate containing a microprocessor by multiple signal lines, then system is designed with multiple matrix switches, one end of each switch is connected with any of the multiple output ports of the microprocessor via one signal line, the other end is connected with any of the multiple input ports of the microprocessor, more than one ports in the multiple input ports and more than one ports in the multiple output ports are short circuit and key input system. Advantage: said key input system can indicate an error code when the interface is not well connected.

Description

technical field [0001] The present invention relates to a key input system and a method for checking the key input state which can easily detect problems in the key input system. Background technique [0002] The function of the oven includes three functions: oven function, grill function, and gas hood function. Under the protection of technology, these functions maintain a high level in terms of efficiency and stability. With the development of Korean-style ovens, the oven's grilling and other functions have reached a considerable level. [0003] Recently, the development of the oven is developing towards personalization and convenience in use on the basis of retaining the functions of the oven that users like. [0004] In addition to the above-mentioned ovens, microwave ovens that heat food using electromagnetic waves are also included in the cooking equipment. [0005] Electric or gas heats the food from the outside, while a microwave heats the food evenly inside and o...

AI Technical Summary

Problems solved by technology

[0018] In the interface 20 connecting the main board and the key input part, if the contact of a certain signal line is poor, then each switch connected to it cannot work normally.

But it is difficult for the user or repairman to find out which specific structure in the overall structure of the oven has a problem

[0019] That is, when the connection state of the interface connecting the key input part and the main board provided with the microprocessor is bad, the signal of the key input part cannot be transmitted to the main board normally, causing the microprocessor to not respond or perform other actions when the user presses the button.

At this time, users or maintenance personnel may mistakenly think that there is a problem with the main board and replace the expensive main board.

thereby placing an unnecessary burden on users

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