MCU--Low Power Processing Flow-EEWORLD

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Nowadays, electronic products generally require low power consumption. Different MCUs may have different processing procedures for entering low power consumption, but the general process is still the same. The processing procedures for MCU entering low power consumption are as follows:

(1) Turn off the power supply of peripherals other than the MCU, such as the power supply of RS485 and CAN transceiver modules;

(2) Deinitialize the initialized MCU on-chip peripheral modules, such as timers, ADC, etc.

(3) If a timed wake-up is required in low power mode, then the RTC function should be initialized at this time; if an external interrupt wake-up is required, then the corresponding external interrupt should be configured at this time;

(4) Deinitialize the initialized IO port. If the IO is pulled up to high, the IO push-pull output is configured to be high level. If the IO is pulled down to ground, the IO port is configured to be high impedance input or push-pull output low level.

(5) Configure unused and floating IO pins and configure IO as high-impedance input (usually, but it depends on the MCU);

Keywords：MCU Reference address：MCU--Low Power Processing Flow

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