In addition to the Xplained Pro standard extension headers, SAM4N
Xplained Pro has three additional headers with spare signals that offers access to the I/O
of the microcontroller that are otherwise not easily available elsewhere or might be
favorable to have collected together. All headers have a pitch of 2.54mm.
Table 4-4. SPARE SIGNALS Header
1| Pin on header | SAM4N pin | Function | Shared functionality |
|---|
| 1 | PA4 | TWCK0 | EXT1, EXT3 |
| 2 | PA28 | TCLK1 | |
| 3 | PA29 | TCLK2 | |
| 4 | PC25 | TCLK3 | |
| 5 | PC28 | TCLK4 | |
| 6 | PC31 | TCLK5 | |
| 7 | PC16 | PCK0 | |
| 8 | PC17 | PCK1 | |
| 9 | PA31 | PCK2 | |
| 10 | PB4 | PWM2 | |
| 11 | - | - | VCC |
| 12 | - | - | GND |
Table 4-5. SPARE SIGNALS Header
2| Pin on header | SAM4N pin | Function | Shared functionality |
|---|
| 1 | PA15 | UTXD2 | |
| 2 | PA16 | URXD2 | |
| 3 | PC5 | GPIO | |
| 4 | PC6 | GPIO | |
| 5 | PC11 | GPIO | |
| 6 | PC22 | GPIO | |
| 7 | PC23 | TIOA3 | EXT1 |
| 8 | PC24 | TIOB3 | EXT1 |
| 9 | PA25 | GPIO | EXT1 |
| 10 | PC12 | AD12 | |
| 11 | - | - | VCC |
| 12 | - | - | GND |
Table 4-6. SPARE SIGNALS Header
3| Pin on header | SAM4N pin | Function | Shared functionality |
|---|
| 1 | PC13 | AD10 | |
| 2 | PC15 | AD11 | |
| 3 | PA2 | DATRG | |
| 4 | PB13 | DAC0 | |
| 5 | - | - | VCC |
| 6 | - | - | GND |
