The recommended crystal oscillator frequency for PCF2123U is 32.768 kHz, which is a standard frequency for real-time clocks.
The PCF2123U does not have built-in time zone configuration. You need to implement time zone adjustments in your application software or use an external time zone converter.
Yes, the PCF2123U has a built-in battery switch and can be used as a battery-backed SRAM. However, the battery life depends on the application and usage.
The maximum operating temperature range for PCF2123U is -40°C to +85°C, as specified in the datasheet.
You can reset the PCF2123U to its default state by applying a power-on reset (POR) or by writing a specific reset command to the device.
