29.5.3 Output and Input Pins

The SUPC can drive two outputs. By writing a '1' to the corresponding Output Enable bit in the Backup Output Control register (BKOUT.EN), the SUPC_OUTn pin is driven by the SUPC.

The OUT pin can be set by writing a '1' to the corresponding Set Output bit in the Backup Output Control register (BKOUT.SETx). The OUT pin can be cleared by writing a '1' to the corresponding CLR bit (BKOUT.CLRx).

If the “Toggle Output Mode X is set to “RTCTGL”, the corresponding SUPC_OUTn pin will toggle when an RTC event occurs. Note that before configuring this mode, this is recommended to configure the RTC module properly. If the “Toggle Output Mode X is set to “BKUPTGL”, the corresponding SUPC_OUTn pin will toggle to one when the device goes to Backup Mode.

The BKIN register reflects the current state of the of the corresponding BKOUT pin if enabled (SUPC.BKOUT.EN = 1).