In addition to the Xplained Pro standard connectors, SAM4E Xplained Pro has one header with spare signals that offers access to the I/O of the microcontroller which are otherwise not easily available elsewhere or might be favourable to have collected toghether. The headers has a pitch of 2.54mm.
| Pin on header | SAM4E pin | Function | Shared functionality |
|---|---|---|---|
| 1 | PC0 | Data line 0 | SRAM, NAND, and LCD connector |
| 2 | PC1 | Data line 1 | SRAM, NAND, and LCD connector |
| 3 | PC2 | Data line 2 | SRAM, NAND, and LCD connector |
| 4 | PC3 | Data line 3 | SRAM, NAND, and LCD connector |
| 5 | PC4 | Data line 4 | SRAM, NAND, and LCD connector |
| 6 | PC5 | Data line 5 | SRAM, NAND, and LCD connector |
| 7 | PC6 | Data line 6 | SRAM, NAND, and LCD connector |
| 8 | PC7 | Data line 7 | SRAM, NAND, and LCD connector |
| 9 | PA23 | CS | LCD connector |
| 10 | PE3 | DISPLAY ENABLE | EDBG DGI and LCD connector |
| 11 | PC11 | RE | SRAM and LCD connector |
| 12 | PC8 | WE | SRAM and LCD connector |
| 13 | - | GND | |
| 14 | - | VCC |