UART communication method with low power consumption

Abstract

The invention provides a UART communication method with low power consumption. The method involves a circuit board (1) and a circuit board (2). A low-frequency oscillating circuit (5) provides a low-frequency working clock for an external UART (9) in a microcontroller (3); a peripheral UART (9) is connected with a UART receiving pin (17) and a UART sending pin (16) of an intelligent module (4) through a UART sending pin (14) and a UART receiving pin (15) of the microcontroller (3), so the UART physical layer communication between the microcontroller (3) and the intelligent module (4) is achieved. A microcontroller core (10) is connected with the peripheral UART (9) through an AHB bus and a bus bridging mode. An interrupt controller (13) in the microcontroller core (10) can receive and manage interrupt signals from the peripheral UART (9), the microcontroller (3) is awakened from a dormant state according to the received interrupt signals and starts to work normally, and the high-frequency working clock is provided by the high-frequency oscillator (12). According to the method, the electric energy consumption of UART communication can be reduced, the service life of the battery is prolonged, and good social benefits and economic benefits can be generated.

Description

technical field [0001] The invention relates to a low-power consumption UART communication application technical solution, especially the UART communication application between circuit boards on battery-powered intelligent terminal equipment, or between module circuits on the circuit board. Background technique [0002] At present, the known UART communication application technologies generally do not have low-power communication functions, and all require the microcontroller to remain awake to send or receive serial data for UART communication. When the serial data content to be sent is large, The microcontroller inside the smart terminal has to stay in the wake-up state for a long time to send and receive data, and cannot enter the sleep state, which will consume more power. If battery power is used and communication is frequent, the UART communication function will have higher requirements on the continuous power supply capability of the battery, which will affect the ser...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the existing high power consumption UART communication application problem, the present invention provides a low power consumption UART communication method, integrates a low power consumption peripheral UART interface through a microcontroller, and uses the microcontroller as a main control unit, to The UART communication of the smart terminal is designed for low power consumption, and finally solves the problem of high power consumption in the process of UART communication, making it suitable for battery-powered scenarios

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