The recommended operating voltage range for the AS11P2TLRQ is 1.7V to 3.6V.
To ensure proper power-on, the VDD pin should be powered up before the VBAT pin. Also, the VDD pin should be powered up slowly (dv/dt < 1V/ms) to prevent latch-up.
The VBAT pin is used to power the internal oscillator and the battery-backed registers. It should be connected to a battery or a capacitor to maintain the data during power-down.
To enter power-down mode, the CE pin should be driven low. During power-down, the device consumes very low current, and the VBAT pin maintains the data.
The maximum clock frequency for the AS11P2TLRQ is 10 MHz.