13.5 Secure Pin Multiplexing on SERCOM
The Secure Pin Multiplexing feature can be used on dedicated SERCOM I/O pins to isolate a secured communication with external devices from the non-secure application.
This feature is automatically enabled as soon as the security attribution of the SERCOM is set to Secured using the PAC peripheral.
When this operation occurs:
- The secured SERCOM instances become mapped only on a specific set of I/Os
- All of the alternate I/O pins of the secured SERCOM instance are kept in a Hi-Z configuration
- The PTC cannot enable PTC lines mapped to any of the secured SERCOM instance I/O pins
- The CCL I/Os mapped to the secured SERCOM instance I/O pins are set to '0'
Refer to Table 34-1 to obtain the list of pins supporting that feature.