AVR-IoT Wx features a mikroBUS socket for expanding the functionality of the development board using MikroElektronika Click boards and other mikroBUS add-on boards. The socket is populated with two 1x8 2.54 mm pitch female headers and is ready to mount add-on boards.
| mikroBUS™ Socket Pin | ATmega4808 Pin | Function | Shared Functionality |
|---|---|---|---|
| AN | PD7 | ADC AIN7 | — |
| RST | PA0 | GPIO | — |
| CS | PC3 | GPIO | — |
| SCK | PA6 | SPI0 SCK | WINC1510 SPI |
| MISO | PA5 | SPI0 MISO | WINC1510 SPI |
| MOSI | PA4 | SPI0 MOSI | WINC1510 SPI |
| +3.3V | VDD | VCC_TARGET, 3.3V supply | — |
| GND | GND | Ground | — |
| PWM | PD4 | TCA0 WO4 | — |
| INT | PD6 | GPIO | — |
| RX | PC1 | UART1 RX | — |
| TX | PC0 | UART1 TX | — |
| SCL | PA3 | TWI0 SCL | MCP9808 and ATECC608A |
| SDA | PA2 | TWI0 SDA | MCP9808 and ATECC608A |
| +5V | — | VCC_MUX1, MCP73871 output | — |
| GND | GND | Ground | — |
1) A 0-ohm resistor has been soldered to connect the VCC_MUX pin to the mikroBUS socket. If an add-on module cannot handle 5V on this pin, the 0-ohm resistor has to be removed. For more information, see Hardware Modifications.