Several of Atmels security devices, including CryptoAuthentication devices like the ATSAH204A, only requires I2C to interface and they share the same packages and pinouts. SAM V71 Xplained Ultra has implemented SOIC8 and UDFN8 footprints for these devices so the user may solder them on themselves. Table 1 shows all connections between the footprint and the ATSAMV71Q21.
| Pin on footprint | SAM V71 pin | Function | Shared functionality |
|---|---|---|---|
| 1 | - | NC | |
| 2 | - | NC | |
| 3 | - | NC | |
| 4 | - | GND | |
| 5 | PA03 [TWD0] | I2C data line | EXT1, EXT2, 2EDBG IC,LCD, Camera, Audio, PLL, MediaLB, EEPROM, and Shield |
| 6 | PA04 [TWCK0] | I2C clock line | EXT1, EXT2, 2EDBG IC,LCD, Camera, Audio, PLL, MediaLB, EEPROM, and Shield |
| 7 | - | NC | |
| 8 | - | VCC_TARGET_P3V3 | |
| PADDLE | - | GND |