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7. AVR Pin Assignment Table Sorted by Function
| Function | Pin |
|---|---|
| digital I/Os (x16) | PB0, PB1, PB2, PB4, PB5, PC0, PC1, PC2, PC3, PC4, PC5, PD0, PD1, PD2, PD4, PD7 |
| analog inputs (x8) | PC0, PC1, PC2, PC3, PC4, PC5, ADC6, ADC7 |
| motor 1 control (A and B) | PD5 and PD6 |
| motor 2 control (A and B) | PD3 and PB3 |
| red user LED | PD1 |
| user trimmer potentiometer | ADC7 |
| ISP programming lines (x3) | PB3, PB4, PB5 |
| RESET | PC6 |
| UART (RX and TX) | PD0 and PD1 |
| I2C/TWI (SDA and SCL) | PC4 and PC5 |
| SPI | inaccessable to user |
| Timer1 PWM outputs (A and B) | PB1 and PB2 |
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