SAM L22 Xplained Pro revision 2 has the ATAES132A CryptoAuthentication device mounted. The table below shows all the connections between the ATAES132A and the ATSAML22N18A for revision 2.
To disconnect the AUTHO pin from PC21, remove the R301. To locate the resistor, see Figure 1.
| ATAES132A pin | SAM L22 pin | Function | Shared functionality |
|---|---|---|---|
| 1 [NC] | - | GND | - |
| 2 [AUTHO] | PC21 | GPIO/EIC | SLCD |
| 3 [NC] | - | - | |
| 4 [GND] | - | GND | - |
| 5 [SDA] | PB30 | SERCOM5 PAD[0] I²C SDA | EXT1, EXT2, EXT3, Shield, and EDBG I²C |
| 6 [SCL] | PB31 | SERCOM5 PAD[1] I²C SCL | EXT1, EXT2, EXT3, Shield, and EDBG I²C |
| 7 [NC] | - | - | |
| 8 [VCC] | - | VCC_TARGET_P3V3 | - |
| PAD | - | GND | - |