Standby mode
When SM2..0 is 110, the SLEEP instruction will put the MCU into Standby mode. The only difference between this mode and Power-down mode is that the oscillator continues to work. The wake-up time only takes 6 clock cycles.
Extended Standby mode
When SM2..0 is 111, the SLEEP instruction will put the MCU into Extended Standby mode. The only difference between this mode and Power-down mode is that the oscillator continues to work. The wake-up time only takes 6 clock cycles.
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