- D2: UART1 RX to communication module
- D3: UART1 TX to communication module
- D4: UART2 RX to piezoelectric
- D5: UART2 TX to piezoelectric
- J0: SN74HC259 S0 (address bit 0)
- J1: SN74HC259 S1 (address bit 1)
- J2: SN74HC259 S2 (address bit 2)
- J3: SN74HC259 D (data)
- J4: SN74HC259 !G (inverted enable)
- J6: SN74HC259 !CLR (inverted clear)
Pins for SD card: use the same pins used for the Olimex board:
- RJ5: SD_CP
- RD7: SDI2 (MISO2)
- RG6: SCK2
- RG8: SDO2 (MOSI2)
- RB14: SS2
- RB0: ADC0 AN0
- RB1: ADC1 AN1
- RB3: ADC3 AN3
- RB4: ADC4 AN4