Matrix circuit and scanning method
A matrix circuit and level technology, applied in the field of matrix circuits and scanning, can solve problems such as easy judgment and error, and achieve the effect of low power consumption
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[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention.
[0031] A matrix circuit disclosed by the invention is used for accurately detecting the closed or opened state of a key. Such as image 3 As shown, including N row lines L 1 ,... L n , N column lines, N×N buttons or switches S 11 ,...S nn , N×N diodes D 11 ,...D nn , N row I / O pins K1, ... Kn and N column I / O pins P1, ... Pn, wherein N is a natural number greater than zero. The N row lines and the N column lines are interlaced to form N×N intersections, each intersection is provided with a key and a diode, and one end of each key is connected to the row line The other end is connected to the anode of the diode, and the cathode of the diode is connected to the I / O pin of the column line, that is, the button or switch S 11 ,...S nn One end of the line is sequentially connected ...
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