void DEVICE_EnterDeepSleep(bool enableRetRam, uint32_t interval);The API is used to enter deep sleep mode.
| Param | Description |
|---|---|
| enableRetRam | Enable/Disable retention ram. |
| Param | Description |
|---|---|
| interval | The interval of deep sleep mode (unit: ms). Set as 0 will keep the device in the deep sleep mode until the INT0 (PB9) is triggered. |
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