STM8S has no peripheral circuits. The MCU CAP is connected to the 104 capacitor reset and connected to the pull-up resistor. All other pins are left floating. The current is tested using the following program as follows: (Similar experiments have been done with STM8L before, and the situation is basically the same)
In addition, when AWU is turned on, the current becomes 200uA. If the watchdog is turned on, it becomes 500uA. These two parameters are not very good and are not suitable for battery applications with periodic wake-up.
The timer and serial port sleep have little effect on power consumption, and the whole machine is still 4.7uA
If a single pin is left floating, 4UA of current will be wasted. If the floating pin is pulled up or down internally or externally, the current will be reduced.
//GPIO_MODE_OUT_OD_LOW_SLOW 4.8uA
//GPIO_MODE_IN_FL_NO_IT 390uA
//GPIO_MODE_IN_PU_NO_IT 4.7uA
//GPIO_MODE_OUT_PP_HIGH_SLOW 4.8uA
//GPIO_MODE_OUT_OD_HIZ_SLOW 44.3uA
#define gpio_mode GPIO_MODE_OUT_PP_HIGH_SLOW
void main(void)
{
MY_GPIO_Init(GPIOA,0XFF,gpio_mode);//
MY_GPIO_Init(GPIOB,0XFF,gpio_mode);//
MY_GPIO_Init(GPIOC,0XFF,gpio_mode);//
MY_GPIO_Init(GPIOD,0XFF,gpio_mode);//
halt();
}
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