Wakeup circuit, wakeup method and electric cooker

Abstract

The present invention discloses a wakeup circuit, a wakeup method and an electric cooker. The wakeup circuit comprises a single chip microcomputer 1, a single chip microcomputer 2 and a power source 1, the wakeup pin of the single chip microcomputer 2 is connected with communication pins of the single chip microcomputer 1 and the single chip microcomputer 2, to allow the single chip microcomputer1 is electrified and then sends wakeup signals to the single chip microcomputer 2, when the single chip microcomputer 2 receives the wakeup signals, the single chip microcomputer 2 is converted from asleep mode to a working mode. Compared to the prior art, the connection liens between the single chip microcomputers are reduced, the single chip microcomputer pin resources are little in occupation,the defects are eliminated that a traditional single chip microcomputer needs to depend on electrifying pulses and wakeup cannot be performed if the electrifying pulses are missed, and the problem isavoided that over-zero signal wakeup needs extra addition of an over-zero signal circuit when 200V power supply is employed, and the hardware resources are saved, and the applicability is wide.

Description

technical field [0001] The invention relates to an electronic control circuit, in particular to a wake-up circuit, a wake-up method and an electric rice cooker. Background technique [0002] In order to reduce the power consumption of the whole system, it is often necessary for the microcontroller to be in a low power consumption mode. The method for waking up the single-chip microcomputer at this stage is external interrupt wake-up, such as the method described in the patent CN102881084B, a pin of the single-chip microcomputer 2 is connected to an interrupt pin of the single-chip microcomputer 1 in sleep. This consumes one pin resource of the microcontroller 1. If two single-chip microcomputers need to be connected through an external connection, the cost of the external connection needs to be increased, and if multi-computer communication is required, the cost will also increase. At the same time, the existing wake-up method also has the following defects: 1. The traditi...

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Problems solved by technology

This consumes a pin resource of MCU 1

If two single-chip microcomputers need to be connected through an external connection, the cost of the external connection needs to be increased, and if multi-computer communication is required, the cost will also increase

At the same time, the existing wake-up method also has the following defects: 1. The traditional single-chip wake-up needs to rely on the power-on pulse. If the power-on pulse is missed, it cannot be woken up.

2. When the power supply is 220V, the use of zero-crossing signal to wake up requires an additional zero-crossing signal circuit

3. Some microcontrollers do not have communication wake-up function

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