33.6.3.2 Secure Pin Multiplexing (PIC32CM LS00 only)

The Secure Pin Multiplexing feature can be used on dedicated SERCOM1 I/O pins to isolate a secure communication with external devices from the non-secure application.

Secure Pin Multiplexing is automatically enabled as soon as SERCOM1 is configured as a secure peripheral (PAC Security attribution).

The following table lists the SERCOM1 pins that support the Secure Pin Multiplexing feature:

Table 33-7. Secure Pin Multiplexing on SERCOM1 Pins (PIC32CM LS00 only)
Pin NameSecure Pin Multiplexing Pad Name
PA16SERCOM1/PAD[0]
PA17SERCOM1/PAD[1]
PA18SERCOM1/PAD[2]
PA19SERCOM1/PAD[3]
CAUTION: When Secure Pin Multiplexing is enabled, only the SERCOM1 pins from the above table become mapped. All of the alternate SERCOM1 pins are kept in a Hi-Z configuration and cannot be selected.