5.4.1 Extension Headers
The Curiosity Nano Touch Adapter implements two Xplained Pro Standard Extension headers (see section Xplained Pro Standard Extension Header) marked with EXT1 and EXT2 in silkscreen. These headers make it possible to connect the Touch extension boards to the Curiosity Nano board with a capacitive touch-enabled microcontroller. The pinout definition for each extension header can be seen in Table 5-2 and Table 5-3.
| Pin on EXT1 | Function | Description |
|---|---|---|
| 1 | ID | Communication Line to ID Chip |
| 2 | GND | Ground |
| 3 | EXT1 XY1 | Connected to Curiosity Nano Pin no. 11 |
| 4 | EXT1 XY3 | Connected to Curiosity Nano Pin no. 50 |
| 5 | EXT1 XY5 | Connected to Curiosity Nano Pin no. 12 |
| 6 | EXT1 XY7 | Connected to Curiosity Nano Pin no. 49 |
| 7 | EXT1 XY2 | Connected to Curiosity Nano Pin no. 45 |
| 8 | EXT1 XY4 | Connected to Curiosity Nano Pin no. 46 |
| 9 | EXT1 XY6 | Connected to Curiosity Nano Pin no. 13 |
| 10 | EXT1 XY8 | Connected to Curiosity Nano Pin no. 47 |
| 11 | I2C_SDA | SDA for LED Driver connected to Curiosity Nano Pin no. 9 |
| 12 | I2C_SCL | SDA for LED Driver connected to Curiosity Nano Pin no. 10 |
| 13 | EXT1 XY13 | Connected to Curiosity Nano Pin no. 8 |
| 14 | EXT1 XY14 | Connected to Curiosity Nano Pin no. 7 |
| 15 | EXT1 XY9 | Connected to Curiosity Nano Pin no. 14 |
| 16 | EXT1 XY10 | Connected to Curiosity Nano Pin no. 43 |
| 17 | EXT1 XY11 | Connected to Curiosity Nano Pin no. 48 |
| 18 | EXT1 XY12 | Connected to Curiosity Nano Pin no. 44 |
| 19 | GND | Ground |
| 20 | VCC | Target Supply Voltage |
| Pin on EXT2 | Function | Description |
|---|---|---|
| 1 | ID | Communication Line to ID Chip |
| 2 | GND | Ground |
| 3 | EXT1 XY15 | Connected to Curiosity Nano Pin no. 16 |
| 4 | EXT1 XY17 | Connected to Curiosity Nano Pin no. 41 |
| 5 | EXT1 XY19 | Connected to Curiosity Nano Pin no. 17 |
| 6 | EXT1 XY21 | Connected to Curiosity Nano Pin no. 40 |
| 7 | EXT1 XY16 | Connected to Curiosity Nano Pin no. 18 |
| 8 | EXT1 XY18 | Connected to Curiosity Nano Pin no. 39 |
| 9 | EXT1 XY20 | Connected to Curiosity Nano Pin no. 19 |
| 10 | EXT1 XY22 | Connected to Curiosity Nano Pin no. 38 |
| 11 | I2C_SDA | SDA for LED Driver connected to Curiosity Nano Pin no. 9 |
| 12 | I2C_SCL | SDA for LED Driver connected to Curiosity Nano Pin no. 10 |
| 13 | EXT1 XY27 | Connected to Curiosity Nano Pin no. 22 |
| 14 | EXT1 XY28 | Connected to Curiosity Nano Pin no. 35 |
| 15 | EXT1 XY23 | Connected to Curiosity Nano Pin no. 20 |
| 16 | EXT1 XY24 | Connected to Curiosity Nano Pin no. 37 |
| 17 | EXT1 XY25 | Connected to Curiosity Nano Pin no. 21 |
| 18 | EXT1 XY26 | Connected to Curiosity Nano Pin no. 36 |
| 19 | GND | Ground |
| 20 | VCC | Target Supply Voltage |