Adaptive input and output circuit and its chip
A technology of input and output circuits and input circuits, applied in the direction of logic circuit connection/interface layout, etc., can solve problems such as large leakage current and inability to work normally, and achieve the effect of avoiding leakage problems and ensuring normal operation.
Active Publication Date: 2017-08-29
WUXI ZGMICRO ELECTRONICS CO LTD
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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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[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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The present invention provides an adaptive input-output circuit and a chip, wherein the adaptive input-output circuit includes an input module output, the level detection circuit and regulated power circuit.Input-output module comprises a power supply terminal and a first connection end, a first end connected to a pin PAD connected to the power source terminal is connected to an adjustable power supply circuit output terminal; connected to the input level detection circuit is connected to pin PAD, the output the adjustable end is connected to an input terminal of the power supply circuit, a level detection circuit for detecting another chip outputs a high level voltage to the data signals on pin PAD, PAD pin and outputs the high level through its output terminal voltage; adjustable power supply circuitry to produce consistent with the high level voltage supply voltage.Compared with the prior art, consistent with the adaptive power supply voltage supply voltage input-output circuit of the present invention can be adjusted to its other input connected to the output circuit, to overcome the leakage problem, to ensure that the input and output circuit is working properly.
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...
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IPC IPC(8): H03K19/0175
Inventor 王钊
Owner WUXI ZGMICRO ELECTRONICS CO LTD