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Pin Mapping
Use these pin names when programming in the Arduino IDE.
NOTE! This table is only applicable when using the M2 board as selected from the Tools -> Board menu from the Arduino IDE. See more information here.
Use the names in the "Mapped Pin Name" column in your Arduino Sketch.
A "pin mapping" describes how the different circuits of your M2 are connected to the processor. For example, the Green LED (DS6 on the schematic) is connected to pin 7 (AKA PA14) of the processor. To make things easier from a programming standpoint, we can map this to a pin name, in this case, the green LED is mapped to the name
DS6 (which is compiled to the value 18).Mapped Pin Name (use these in your sketch) | M2 Board Signal Name | Notes | SAM3X Pin Name | Processor CHIP physical PIN | PinDescription Array Number |
DS2 | DS2 (RED) | LED ON = LOW | PD10 | 32 | 14 |
DS3 | DS3 (YELLOW) | LED ON = LOW | PA5 | 25 | 15 |
DS4 | DS4 (YELLOW) | LED ON = LOW | PD2 | 15 | 16 |
DS5 | DS5 (YELLOW) | LED ON = LOW | PA15 | 8 | 17 |
DS6 | DS6 (GREEN) | LED ON = LOW | PA14 | 7 | 18 |
DS7_BLUE or RGB_BLUE | RGB BLUE | LED ON = LOW | PC25 | 136 | 19 |
DS7_RED or RGB_RED | RGB RED | LED ON = LOW | PD7 | 20 | 20 |
DS7_GREEN or RGB_GREEN | RGB GREEN | LED ON = LOW | PD8 | 21 | 21 |
Mapped Pin Name (use these in your sketch) | M2 Board Signal Name | Notes | SAM3X Pin Name | Processor CHIP physical PIN | PinDescription Array Number |
Button1 | TACT SW1 | Button pressed = LOW | PC27 | 138 | 22 |
Button2 | TACT SW2 | Button pressed = LOW | PB6 | 121 | 23 |
Mapped Pin Name (use these in your sketch) | M2 Board Signal Name | Notes | SAM3X Pin Name | Processor CHIP physical PIN | PinDescription Array Number |
SD_SW | SD_SW | Card is inserted = LOW | PC30 | 103 | 36 |
MCCK | MCCK | | PA19 | 71 | 37 |
MCCDA | MCCDA | | PA20 | 72 | 38 |
MCDA0 | MCDA0 | | PA21 | 107 | 39 |
MCDA1 | MCDA1 | | PA22 | 81 | 40 |
MCDA2 | MCDA2 | | PA23 | 80 | 41 |
MCDA3 | MCDA3 | | PA24 | 79 | 42 |
Mapped Pin Name (use these in your sketch) | M2 Board Signal Name | Notes | SAM3X Pin Name | Processor CHIP physical PIN | PinDescription Array Number |
SPI0_CS1 | SPI0_nCS1 | Not connected by default | PA29 | 112 | 46 |
SPI0_MOSI | SPI0 MOSI | Not connected by default | PA26 | 109 | 44 |
SPI0_CLK | SPI0 CLK | Not connected by default | PA27 | 110 | 45 |
SPI0_MISO | SPI0 MISO | Not connected by default | PA25 | 108 | 43 |
Mapped Pin Name (use these in your sketch) | M2 Board Signal Name | Notes | SAM3X Pin Name | Processor CHIP physical PIN | PinDescription Array Number |
GPIO1 | GPIO1 A | SOURCE (J5, Pin 2) | PC3 (PWMH0) | 60 | 24 |
GPIO2 | GPIO2 A | SOURCE (J5, Pin 2) | PC5 (PWMH1) | 63 | 25 |
GPIO3 | GPIO3 A | SOURCE (J5, Pin 2) | PC7 (PWMH2) | 65 | 26 |
GPIO4 | GPIO4 A | SINK (J5, Pin 2) | PC9 (PWMH3) | 67 | 27 |
GPIO5 | GPIO5 A | SINK (J5, Pin 2) | PC20 (PWMH4) | 131 | 28 |
GPIO6 | GPIO6 A | SINK (J5, Pin 2) | PC19 (PWMH5) | 101 | 29 |
GPIO1_B | GPIO1 B | PWML0 (Beta M2 Hardware only) | PC2 (PWML0) | 59 | 30 |
GPIO2_B | GPIO2 B | PWML1 (Beta M2 Hardware only) | PC4 (PWML1) | 116 | 31 |
GPIO3_B | GPIO3 B | PWML2 (Beta M2 Hardware only) | PC6 (PWML2) | 64 | 32 |
GPIO4_B | GPIO4 B | PWML3 (Beta M2 Hardware only) | PC8 (PWML3) | 66 | 33 |
GPIO5_B | GPIO5 B | PWML4 (Beta M2 Hardware only) | PC21 (PWML4) | 132 | 34 |
GPIO6_B | GPIO6 B | PWML5 (Beta M2 Hardware only) | PC22 (PWML5) | 133 | 35 |
Mapped Pin Name (use these in your sketch) | M2 Board Signal Name | Notes | SAM3X Pin Name | Processor CHIP physical PIN | PinDescription Array Number |
ANALOG_1 | ANA 1 | J5 Pin 1 | PB19 | 90 | 86 |
ANALOG_2 | ANA 2 | J5 Pin 5 | PB18 | 89 | 87 |
ANALOG_3 | ANA 3 | J5 Pin 9 | PA2 | 85 | 88 |
ANALOG_4 | ANA 4 | J5 Pin 13 | PA4 | 83 | 89 |
ANALOG_5 | ANA 5 | J5 Pin 17 | PA3 | 84 | 90 |
ANALOG_6 | ANA 6 | J5 Pin 21 | PA16 | 78 | 91 |
Mapped Pin Name (use these in your sketch) | M2 Board Signal Name | Notes | SAM3X Pin Name | Processor CHIP physical PIN | PinDescription Array Number |
I_SENSE_EN | 12Vio_EN | GPIO Power Supply Enable | PC24 | 135 | 75 |
I_SENSE | I SENSE 12V | GPIO Power Supply Analog Current Sense | PB17 | 88 | 93 |
I-SENSE_INT | OVER_CURRENT | GPIO Power Supply Interrupt | PD1 | 14 | 76 |
I-SENSE_DAC | DAC1 | GPIO Power Supply Analog Output to Comparator | PB16 | 77 | 95 |
Mapped Pin Name (use these in your sketch) | M2 Board Signal Name | Notes | SAM3X Pin Name | Processor CHIP physical PIN | PinDescription Array Number |
CANRX0 | CANRX0 | | PA1 | 24 | 69 |
CANTX0 | CANTX0 | | PA0 | 23 | 70 |
CAN0_CS or HS_CS | HSC_S | | PD3 | 16 | 71 |
CANRX1 | CANRX1 | | PB15 | 76 | 72 |
CANTX1 | CANTX1 | | PB14 | 140 | 73 |
CAN1_CS or MS_CS | MSC_S | | PD0 | 13 | 25 |
Mapped Pin Name (use these in your sketch) | M2 Board Signal Name | Notes | SAM3X Pin Name | Processor CHIP physical PIN | PinDescription Array Number |
PS_BUCK or BUCK_DIS | BUCK_nDIS | | PC10 | 117 | 48 |
PS_J1850_9141 | J1850 9141 ON | Bring LOW for LOW power | PB5 | 120 | 49 |
Mapped Pin Name (use these in your sketch) | M2 Board Signal Name | Notes | SAM3X Pin Name | Processor CHIP physical PIN | PinDescription Array Number |
J1850_PWM_VPW | J1850_PWM_nVPW | | PB8 | 123 | 50 |
J1850_PWM_RX | J1850_PWM_RX | | PC28 | 139 | 51 |
J1850_VPW_RX | J1850_VPW_RX | | PC26 | 137 | 52 |
J1850P_TX | J1850+_TX | | PC18 | 100 | 53 |
J1850N_TX | J1850-_TX | | PC23 | 134 | 54 |
Mapped Pin Name (use these in your sketch) | M2 Board Signal Name | Notes | SAM3X Pin Name | Processor CHIP physical PIN | PinDescription Array Number |
XBEE_RX or RX0 | XB_UART RX | UART serial URXD | PA8 | 27 | 0 |
XBEE_TX or TX0 | XB_UART TX | UART serial UTXD | PA9 | 2 | 1 |
XBEE_RST | XB_nRST | | PC11 | 93 | 4 |
XBEE_PWM | XB_RSSI_PWM | | PB3 | 118 | 7 |
XBEE_MULT4 | XB_MULT4 | | PD6 | 19 | 11 |
XBEE_MULT5 | XB_MULT5 | | PD9 | 22 | 12 |
XBEE_MULT1 | XB_MULT1 | | PC12 | 94 | 8 |
XBEE_CTS | XB_nCTS | | PB26 | 1 | 3 |
XBEE_STAT | XB_STAT | | PC13 | 95 | 5 |
XBEE_VREF | XB_Vref | | PC14 | 96 | 6 |
XBEE_MULT2 | XB_MULT2 | | PC15 | 97 | 9 |
XBEE_RTS | XB_nRTS | | PB25 | 144 | 2 |
XBEE_MULT3 | XB_MULT3 | | PC17 | 99 | 10 |
XBEE_MULT6 | XB_MULT6 | | PA7 | 26 | 13 |
Image showing pin names of the XBEE socket on M2
Mapped Pin Name (use these in your sketch) | M2 Board Signal Name | Notes | SAM3X Pin Name | Processor CHIP physical PIN | PinDescription Array Number |
LIN_KTX | 9141 K TX | Serial1 | PA11 | 4 | 55 |
LIN_KRX | 9141 K RX | | PA10 | 3 | 56 |
LIN_KSLP | 9141 K SLP | | PB4 | 119 | 57 |
LIN_LTX | 9141 L TX | Serial2 | PA13 | 6 | 58 |
LIN_LRX | 9141 L RX | | PA12 | 5 | 59 |
LIN_LSLP | 9141 L SLP | | PB7 | 122 | 60 |
Mapped Pin Name (use these in your sketch) | M2 Board Signal Name | Notes | SAM3X Pin Name | Processor CHIP physical PIN | PinDescription Array Number |
SWC_M1 | SWC M1 | | PB0 | 113 | 65 |
SWC_M0 | SWC M0 | | PB27 | 68 | 64 |
SWC_SOF | SWC SOF | | PC29 | 102 | 68 |
SWC_CLK | SWC CLK | | PB22 | 141 | 66 |
SPI0_CS3 | SPI0_nCS3 | | PB23 | 142 | 63 |
SWC_INT | SWC nINT | | PC16 | 98 | 67 |
SWC_RX0 | SWC nRX0BF | | PB1 | 114 | 61 |
SWC_RX1 | SWC nRX1BF | | PB2 | 115 | 62 |
Mapped Pin Name (use these in your sketch) | M2 Board Signal Name | Notes | SAM3X Pin Name | Processor CHIP physical PIN | PinDescription Array Number |
SPI0_MISO | SPI0 MISO | Optionally connected to SD Card | PA25 | 108 | 43 |
SPI0_MOSI | SPI0 MOSI | Optionally connected to SD Card | PA26 | 109 | 44 |
SPI0_CLK | SPI0 CLK | Optionally connected to SD Card | PA27 | 110 | 45 |
SPI0_CS1 | SPI0_nCS1 | Optionally connected to SD Card | PA29 | 112 | 46 |
SPI0_CS0 | SPI0_nCS0 | | PA28 | 111 | 47 |
Mapped Pin Name (use these in your sketch) | M2 Board Signal Name | Notes | SAM3X Pin Name | Processor CHIP physical PIN | PinDescription Array Number |
TXD3 | UART3 TX | J5 Pin 7 (3.3V UART) | PD4 | 17 | 77 |
RXD3 | UART3 RX | J5 Pin 8 (3.3V UART) | PD5 | 18 | 78 |
SDA0 | SDA0 | J5 Pin 4 | PA17 | 9 | 79 |
SCL0 | SCL0 | J5 Pin 3 | PA18 | 70 | 80 |
SPI_CS2 | USART2RX | J5 Pin 15 | PB21 | 92 | 83 |
Mapped Pin Name (use these in your sketch) | M2 Board Signal Name | Notes | SAM3X Pin Name | Processor CHIP physical PIN | PinDescription Array Number |
V_SENSE | AD3 | Analogue input Vehicle Volts | PA6 | 82 | 92 |
CPU_TEMP or A15 | Internal | CPU Temperature | PD5 | Internal | 94 |
Mapped Pin Name (use these in your sketch) | M2 Board Signal Name | Notes | SAM3X Pin Name | Processor CHIP physical PIN | PinDescription Array Number |
SDA1 | SDA1 | Eeprom | PB12 | 86 | 81 |