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12.3 IDLE Mode
The power control register is set to ‘01h’ to enter the IDLE Mode. In this mode, the internal oscillation circuits remain
active. Oscillation continues and peripherals are operated normally but CPU stops. It is released by reset or interrupt.
To be released by interrupt, interrupt should be enabled before IDLE mode. If using reset, because the device
becomes initialized state, the registers have reset value.
Figure 12.1 IDLE Mode Release Timing by External Interrupt