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6. AVR Pin Assignment Table Sorted by Function
| Function | megaxx8 Pin |
|---|---|
| digital I/Os (x8) | PD0, PD1, PC0 – PC5 |
| analog inputs (x8) | PC0 – 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 |
| green user LED | PD7 |
| user pushbuttons (x3) | PB1, PB4, and PB5 |
| buzzer | PB2 |
| LCD control (RS, R/W, E) | PD2, PB0, and PD4 |
| LCD data (4-bit: DB4 – DB7) | PB1, PB4, PB5, and PD7 |
| user trimmer potentiometer | ADC7 (through shorting block) |
| temperature sensor (LV-168 only) battery voltage monitor (SV-xx8 only) | ADC6 (through SMT jumper) |
| ICSP programming lines (x3) | PB3, PB4, PB5 |
| reset pushbutton | PC6 |
| UART (RX and TX) | PD0 and PD1 |
| I2C/TWI (SDA and SCL) | PC4 and PC5 |
| SPI | inaccessable to user |










