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Novel dynamic transformation matrix key position scanning circuit and key position positioning method thereof

A scanning circuit and dynamic transformation technology, applied in the new microprocessor dynamic transformation matrix key scanning circuit and its key positioning field, can solve the problems of complex functions, increased testing costs, invisible products, etc.

Active Publication Date: 2019-07-30
君凯迪科技(深圳)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] There are many kinds of key scanning circuits in the existing circuit, and there are many patterns, such as voltage-dividing AD conversion, comparator circuit, and row-column scanning method. Not only the structure is complex and the function is complex, but the driving circuit with complex circuit structure is often used. To complete the key scanning function of multiple functions, and occupy a lot of IO resources, on the one hand, the cost will be relatively high. risk, increase the cost of testing, and reduce the pass rate of products
[0003] The functions of products with key positions are becoming more and more complex, and more and more keys are required. In the existing technology, the keyboard circuit uses more IOs, requires more pins, and costs more.
see figure 1 , the matrix keyboard is divided into row lines and column lines. For a 4*4 keyboard, 8 data lines are required, occupying 8 IO ports, which consumes a lot of resources

Method used

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  • Novel dynamic transformation matrix key position scanning circuit and key position positioning method thereof
  • Novel dynamic transformation matrix key position scanning circuit and key position positioning method thereof
  • Novel dynamic transformation matrix key position scanning circuit and key position positioning method thereof

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Embodiment Construction

[0035] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Apparently, the described embodiments are part of the embodiments of the present invention, but not all of them. 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.

[0036] Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings of this specification.

[0037] Such as image 3 As shown, the novel dynamic transformation matrix key scanning circuit and its key positioning method provided by the present invention include scanning circuit and positioning method:

[0038] The scanning circuit includes input and output terminals and diodes:

[0039] Wherein, the input and output terminals include the fir...

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Abstract

The invention relates to a novel dynamic transformation matrix key position scanning circuit and a key position positioning method thereof. The invention provides a novel dynamic transformation matrixkey position scanning circuit and a key position positioning method thereof. The circuit comprises a scanning circuit, comprising an input / output port and a unidirectional conduction diode. The input / output end comprises a first input / output end A1, a second input / output end A2, a third input / output end A3, a fourth input / output end A4 and an nth input / output end An. The unidirectional conductiondiode comprises a first diode D1, a second diode D2, a third diode D3, a fourth diode D4 and an nth diode Dn.

Description

technical field [0001] The present invention generally relates to a key position scanning circuit and a key position positioning method thereof. In particular, it relates to a novel microprocessor dynamic transformation matrix key position scanning circuit and a key position positioning method thereof. Background technique [0002] There are many kinds of key scanning circuits in the existing circuit, and there are many patterns, such as voltage-dividing AD conversion, comparator circuit, and row-column scanning method. Not only the structure is complex and the function is complex, but the driving circuit with complex circuit structure is often used. To complete the key scanning function of multiple functions, and occupy a lot of IO resources, on the one hand, the cost will be relatively high. Risks increase the cost of testing and reduce the pass rate of products. [0003] The functions of products with key positions are becoming more and more complex, and more and more k...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K17/76
CPCH03K17/76
Inventor 冯秋雄徐千朗悦詹莉
Owner 君凯迪科技(深圳)有限公司
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