- **Interrupt**: **Clock** is on `PD1` and **Data** on `PD0`.(Recommended. Soarer's converter compatible)
- **Busywait**: **Clock** is on `PD1` and **Data** on `PD0`.
- **USART**: **Clock** is on `PD5` and **Data** on `PD2`.
-3. Optionally you need pull-up register. 1K-10K Ohm is OK.
+3. Optionally you need pull-up resistor. 1K-10K Ohm is OK.
To change pin configuration edit config.h.