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Self-adaptive input and output circuit and chip thereof

A technology of input and output circuits and input circuits, which is applied in the direction of logic circuit connection/interface layout, etc., can solve the problems of large leakage current and failure to work normally, and achieve the effect of avoiding leakage problems and ensuring normal operation

Active Publication Date: 2015-01-21
WUXI ZGMICRO ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If input and output circuits with different power supply voltages are connected together, it will cause a large leakage current and cannot work properly

Method used

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  • Self-adaptive input and output circuit and chip thereof
  • Self-adaptive input and output circuit and chip thereof
  • Self-adaptive input and output circuit and chip thereof

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Embodiment Construction

[0021] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0022] Reference herein to "one embodiment" or "an embodiment" refers to a particular feature, structure or characteristic that can be included in at least one implementation of the present invention. "In one embodiment" appearing in different places in this specification does not all refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments. Unless otherwise specified, the words connected, connected, and joined in this document mean that they are electrically connected directly or indirectly.

[0023] Please refer to figure 1 As shown, it is a connection schematic diagram of two input and output circuits with different power supply voltages, which shows two chips...

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PUM

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Abstract

The invention provides a self-adaptive input and output circuit and a chip of the self-adaptive input and output circuit. The self-adaptive input and output circuit comprises an input and output module, a level detecting circuit and an adjustable power circuit. The input and output module comprises a power end and a first connecting end, wherein the first connecting end is connected with a pin PAD, and the power end is connected with the output end of the adjustable power circuit. The input end of the level detecting circuit is connected with the pin PAD, the output end of the level detecting circuit is connected with the input end of the adjustable power circuit, the level detecting circuit is used for detecting the high-level voltage of digital signal output to the pin PAD by another chip, and the high-level voltage of the pin PAD is output through the output end of the level detecting circuit. The adjustable power circuit generates a power voltage with the voltage identical with the high-level voltage. Compared with the prior art, the power voltage of the self-adaptive input and output circuit can be adjusted to be identical with that of another input and output circuit connected with the self-adaptive input and output circuit, so that the problem of electric leakage is solved, and it is guaranteed that the input and output circuit normally works.

Description

【Technical field】 [0001] The invention relates to the field of circuit design, in particular to an adaptive input-output circuit and a chip thereof. 【Background technique】 [0002] In various circuit systems, there are usually cases where different chips communicate through pins. For example, processors (such as various MCUs (Micro Control Units, micro control units), ARM general-purpose processors, etc.) need to communicate with The memory card exchanges data, or the processor exchanges data with the sensor chip. A common circuit for communication between different chips is a general purpose input and output circuit (GPIO, General Purpose Input Output). However, since different chips are manufactured with different processes, the power supply voltage (or power supply voltage) of the input and output circuits will be different, for example, The input and output circuits of some chips are powered by 3.3V power supply, and the input and output circuits of some chips are power...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K19/0175
Inventor 王钊
Owner WUXI ZGMICRO ELECTRONICS CO LTD