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A method and circuit for waking up i2c equipment

A device and circuit technology, applied in methods and circuits, to wake up I2C devices, can solve the problems of unable to wake up ICs normally, low efficiency of I2C device wake-up process, unable to guarantee timely wake-up and normal use of I2C devices, etc., to improve wake-up efficiency, Efficient awakening effect

Active Publication Date: 2021-10-15
AUTOCHIPS WUHAN CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A method and circuit for waking up i2c equipment
  • A method and circuit for waking up i2c equipment
  • A method and circuit for waking up i2c equipment

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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 device. The method includes: judging whether a start signal is received; when it is determined that the start signal is received, judging the next signal received after the start signal Whether it is a matching address signal; when it is determined that the next signal is a matching address signal, generate a wake-up instruction to wake up the I2C device; otherwise, clear the start signal received before the next signal, and return to The above step of judging whether the start signal is received. Through the above method, the present invention can improve the efficiency of the wake-up process of the I2C device, and ensure the timely wake-up and normal use of the I2C device.

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 Patents(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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