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

Active Publication Date: 2014-07-16
大唐电信科技产业控股有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Because the application functions of middle and high-end handheld terminals are relatively non-rich and require a lot of IO resources, and keyboard scanning signals occupy a lot of IO ports, often resulting in insufficient IO ports and affecting the performance of the terminal

Method used

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  • Matrix keyboard circuit, scanning method and device, processor and handheld terminal
  • Matrix keyboard circuit, scanning method and device, processor and handheld terminal
  • Matrix keyboard circuit, scanning method and device, processor and handheld terminal

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Embodiment Construction

[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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Abstract

The invention discloses a matrix keyboard circuit, a scanning method, a scanning device, a processor and a handheld terminal. The matrix keyboard circuit comprises a normal phase matrix, a reverse phase matrix and / or an independent matrix. The matrix keyboard circuit disclosed by the embodiment of the invention comprises the normal phase matrix, the reverse phase matrix and / or the independent matrix. Under the condition of not adding a scanning signal, a keyboard is scanned by using the characteristic that the same scanning signal has different scanning results in different matrixes, the number of scanned keys can be greatly increased, the problem that input / output (IO) ports are not enough is solved, and the performance of the terminal is improved.

Description

technical field [0001] The invention relates to the field of mobile communication equipment, in particular to a matrix keyboard circuit, a scanning method, a device, a processor and a handheld terminal. Background technique [0002] Keyboard controllers in handheld devices (including wireless mobile terminals) have basically been integrated on the main chip, and the scanning signal of the keyboard controller is multiplexed with the IO port of the main chip. [0003] For example, the traditional 6x6 matrix keyboard circuit such as figure 1 As shown, the IO port of the processor is used to send the column scan signal Col and the row scan signal Row[, each column scan input signal Col[5...0] is pulled up to the power supply VCC through the corresponding resistor R respectively, and the row scan signal The scanning signal Row[5...0] and the column scanning input signal Col[5...0] are not directly connected at the intersection, and are connected to the column scanning input sign...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/02
Inventor 范团宝
Owner 大唐电信科技产业控股有限公司
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