4.2.1 OLED1 Xplained Pro Extension Header
OLED1 Xplained Pro implements one Xplained Pro standard extension header marked with EXT in silkscreen. This header makes it possible to connect the board to any Xplained Pro MCU board. The pinout definition for the extension header can be seen in the table below.
| Pin Number | Function | Description |
|---|---|---|
| 1 | ID | Communication line to ID chip |
| 2 | GND | Ground |
| 3 | BUTTON2 | Push button 2, active-low |
| 4 | BUTTON3 | Push button 3, active-low |
| 5 | DATA_CMD_SEL | Data/command select for OLED display. High = data, low = command. |
| 6 | LED3 | LED3, active-low |
| 7 | LED1 | LED1, active-low |
| 8 | LED2 | LED2, active-low |
| 9 | BUTTON1 | Push button 1, active-low |
| 10 | DISPLAY_RESET | Reset line for OLED display, active-low |
| 11 | NC | |
| 12 | NC | |
| 13 | NC | |
| 14 | NC | |
| 15 | DISPLAY_SS | OLED display slave select, active-low |
| 16 | SPI MOSI | MOSI signal SPI connected to OLED display |
| 17 | NC | |
| 18 | SPI SCK | Clock signal for SPI connected to OLED display |
| 19 | GND | Ground |
| 20 | VCC | Target supply voltage |