Method and circuit for waking up I2C device

A device and circuit technology, applied in the field of waking up I2C devices, methods and circuits, can solve problems such as failure to wake up ICs normally, low efficiency of I2C device waking up process, and inability to guarantee timely waking up and normal use of I2C devices, so as to improve wakeup efficiency, Efficient awakening effect

Active Publication Date: 2020-03-06
AUTOCHIPS WUHAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the wake-up sequence of the I2C device includes a start signal and an address signal. If a glitch occurs when the wake-up sequence is sent, the I2C wake-up sequence cannot wake up the IC normally. The only way to wake up the IC device is by powering off Or restart to restore the normal use of the IC. In this way, the wake-up process of the I2C device is inefficient and cannot guarantee the timely wake-up and normal use of the I2C device.
[0004] In the long-term research and development process, the inventor of the present application found that the existing I2C device wake-up process is inefficient and cannot guarantee the timely wake-up and normal use of the I2C device

Method used

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  • Method and circuit for waking up I2C device
  • Method and circuit for waking up I2C device
  • Method and circuit for waking up I2C device

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Embodiment Construction

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, 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.

[0027] In order to save energy, I2C devices are usually set to sleep under certain conditions, and wake them up when needed, and resume use. The method for waking up the I2C device in a dormant state includes the following implementation manners.

[0028] see figure 1 , figure 1 It is a schematic flow chart of an embodiment of a method for waking up an I2C device according to the present invention, and the method includes:

[0029] Step S100...

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Abstract

The invention discloses a method and a circuit for waking up an I2C (Inter-Integrated Circuit) device. The method comprises the following steps of: judging whether a starting signal is received or not; when determining that the starting signal is received, judging whether a next signal received after the starting signal is a matched address signal or not when determining that the next signal is amatched address signal, generating a wake-up instruction to wake up the I2C device; otherwise, clearing the starting signal received before the next signal, and returning to the step of judging whether the starting signal is received or not. By means of a mode, the efficiency of the awakening process of the I2C device can be improved, and timely awakening and normal use of the I2C device are guaranteed.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method and circuit for waking up an I2C device. Background technique [0002] The I2C bus supports any IC production process, passing information between devices connected to the bus through the serial data line (SDA) and serial clock line (SCL). Each device is identified by a unique address and can act as a transmitter or receiver. In order to save energy, the I2C device will be set to sleep under certain conditions, and it will be woken up when needed for reuse. [0003] In the prior art, the wake-up sequence of the I2C device includes a start signal and an address signal. If a glitch occurs when the wake-up sequence is sent, the I2C wake-up sequence cannot wake up the IC normally. The only way to wake up the IC device is by powering off Or restart to restore the normal use of the IC. In this way, the wake-up process of the I2C device is inefficient, and the timely w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F13/42
CPCG06F13/4282G06F1/3296G06F9/4418G06F2213/0016
Inventor 付惠兰张杰卢书杰
Owner AUTOCHIPS WUHAN CO LTD
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