Matrix keyboard circuit, scanning method and device, processor and handheld terminal
A matrix keyboard and circuit scanning technology, which is applied in the fields of matrix keyboard circuits, devices, scanning methods, processors and handheld terminals, can solve the problems of insufficient IO ports, affecting terminal performance, and many IO resources, etc., to solve insufficient, The effect of increasing the number of key scans and improving performance
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[0046] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0047] The embodiment of the invention discloses a matrix keyboard circuit, its structure is as follows: image 3 As shown, it includes: a positive phase matrix 31, an inverted phase matrix 32 and an independent matrix 33, wherein: the number of row scanning signals and column scanning signals output by the keyboard controller in this embodiment are m+1, n+1 respectively, The number of the first buttons corresponding to each row scanning signal is n+1, corresp...
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