Useful Information
JP4 pinout
The right angle connector has the following pinout (starting from the pin near JP1):
| JP4 Pin | Arduino Shield Pin | Description |
|---|---|---|
| 1 | 0 | D0, Serial RX, PCINT16 |
| 2 | 1 | D1, Serial TX, PCINT17 |
| 3 | 2 | D2, INT0, PCINT18 |
| 4 | 3, PWM | D3, OC2B, INT1, PCINT19 |
| 5 | 4 | D4, XCK, T0, PCINT20 |
| 6 | 5 | D5, OC0B, T1, PCINT21 |
| 7 | 6, PWM | D6, OC0A, AIN0, PCINT22 |
| 8 | 7 | D7, AIN1, PCINT23 |
| 9 | 8 | B0, CLKO, ICP1, PCINT0 |
| 10 | 9, PWM | B1, OC1A, PCINT1 |
| 11 | 10, PWM | B2, SPI Slave Select, OC1B, PCINT2 |
| 12 | 11, PWM | B3, SPI MOSI, OC2A, PCINT3 |
| 13 | 12 | B4, SPI MISO, PCINT4 |
| 14 | 13 | B5, SPI SCK, PCINT5 |
| 15 | Ground | Ground |
| 16 | Aref | AREF, coupled via 100uH inductor and 100nF capactor |
| 17 | Analog 0 | C0, ADC0, PCINT8 |
| 18 | Analog 1 | C1, ADC1, PCINT9 |
| 19 | Analog 2 | C2, ADC2, PCINT10 |
| 20 | Analog 3 | C3, ADC3, PCINT11 |
| 21 | Analog 4 | C4, ADC4, SDA, PCINT12 |
| 22 | Analog 5 | C5, ADC5, SCL, PCINT13 |
| 23 | Vin | Vin (from the DC jack) |
| 24 | +5V | +5V |
| 25 | Reset | Reset (active low), C6, PCINT14 |
Solder Jumpers
On the underside of the board are a number of solder jumpers.
Underneath D1, cutting the trace between the solder jumper disables the indicator LED. It can be reconnected by bridging the pads with solder.
Underneath R2 to R4, cutting the traces between the 2 leftmost pads (on each set of 3) disables the USB connection. Bridging the right set swaps the D- and D+ lines (useful if you want to have the computer wake the microcontroller from sleep - note that you will need to patch the bootloader if you do this).