The recommended power-up sequence is to apply VCC first, followed by VBAT. This ensures that the internal voltage regulators are powered up correctly.
To ensure low power consumption during shutdown, make sure that the SHDN pin is pulled low, and the VBAT pin is disconnected from the battery. This will put the device in a low-power shutdown mode.
The maximum allowed voltage on the VBAT pin is 3.6V. Exceeding this voltage may damage the device.
The DS12C887A+ has an internal oscillator that can be configured using the OSCEN and OSCFREQ pins. Consult the datasheet for specific configuration options and frequency settings.
The RST pin is an active-low reset input that can be used to reset the device. When the RST pin is pulled low, the device will reset and restart. This pin can be connected to a push-button or a reset generator IC.