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Output/input module

A technology for inputting and inputting signals, which is applied in the field of output and input modules, and can solve the problems of noise interference of input and output pins, complicated control of voltage supply circuit 11, etc.

Pending Publication Date: 2022-06-07
FARADAY TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The demand for this switching operation not only makes the control of the voltage supply circuit 11 quite complicated, but also makes the input / output pin (IO) 15 susceptible to noise interference because the voltage supply circuit 11 switches between various voltage values.

Method used

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Examples

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Embodiment Construction

[0045] See figure 2 , which is a block diagram of the I / O module of the present disclosure. The I / O module is electrically connected between the control circuit and the I / O pin (IO) 25 . The I / O pin (IO) 25 is electrically connected to the I / O module 20 through the I / O node Nio. The I / O module 20 includes a pre-driver 21 and a post-driver 23 . The control circuit 26 provides a core voltage (Vcore), an input signal (IN) and an enable signal (EN). The supply voltage Vdd (eg, 1.05V) is greater than the core voltage Vcore (eg, 0.8V).

[0046] The front driver 21 is electrically connected to the control circuit 26, and receives the core voltage (Vcore), the input signal (IN) and the enable signal (EN) from the control circuit 26, wherein the internal circuit of the front driver 21 is based on the core voltage (Vcore) operate. The front driver 21 generates a pull-up selection signal (Su) and a pull-down selection signal (Sd) according to the input signal (IN) and the enable si...

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PUM

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Abstract

The invention relates to an output / input module electrically connected between a control circuit and an output / input pin. The output / input module comprises a front driver and a rear driver. The front driver is electrically connected to the control circuit, and the rear driver is electrically connected to the front driver and the input / output pin. The front driver generates a pull-up selection signal and a pull-down selection signal according to an input signal and an enable signal output by the control circuit. The rear driver sets the level of the output / input pin according to the pull-up selection signal and the pull-down selection signal. When the enable signal is at a first logic level, the output / input pin is in a high impedance state. When the enable signal is the second logic level, the voltage of the input / output pin changes along with the logic level of the input signal. Wherein the first logic level and the second logic level are opposite to each other.

Description

technical field [0001] The present invention relates to an I / O module, and in particular to an I / O module controlled by logic signals. Background technique [0002] See figure 1 , which is a block diagram of a prior art I / O module. In order to control the voltage of the I / O pin (IO) 15 and pull it up or down, the I / O module 10 in the prior art needs to use a voltage supply circuit 11 . by figure 1 For example, the voltage supply circuit 11 has to provide the control voltages Vctl1, Vctl2, Vctl3 to the gates of the transistors M1, M2, M3. The control voltage Vct11 may be between 2.5V and 4.5V, the control voltage Vctl2 may be between 0V and 4.5V, and the control voltage Vctl3 may be at 2.5V. [0003] For example, when the input signal IN is at a high logic level (IN=1), the voltage supply circuit 11 needs to set the control voltage Vctl1 to 2.5V, and set the control voltage Vctl2 to 0V, so that the transistor M2 is turned off and the transistor M2 is turned off. M2 corre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K19/173
CPCH03K19/1733H03K19/00361
Inventor 吴志宏马瑜杰
Owner FARADAY TECH CORP