configure RTC GPIO16
PAD_DRIVER | if set to 0: normal output, if set to 1: open drain |
INT_TYPE | if set to 0: GPIO interrupt disable, if set to 1: rising edge trigger, if set to 2: falling edge trigger, if set to 3: any edge trigger, if set to 4: low level trigger, if set to 5: high level trigger |
WAKEUP_ENABLE | RTC GPIO wakeup enable bit |