4.7 RTC Pinout
The pins used for Tamper Detection by the Real Time Counter (RTC) are not mapped to the normal PORT functions. These pins and their multiplexing is controlled by register settings of the RTC. If many pins of the tamper detection feature is not used by the RTC, then the pin could be used for other I/O functions, by ensuring the corresponding TAMPCTRL.INACT function is disabled.
| RTC Signal | I/O Pin |
|---|---|
| IN0 | PB00 |
| IN1 | PB02 |
| IN2 | PA02 |
| IN3 | PC00 |
| IN4 | PC01 |
| OUT | PB01 |
Important: If Supply Controller
(SUPC) and RTC are configured to drive pin PB01 or pin PB02, then the RTC has
priority.