| Pin Number |
Pin Name |
Arduino Pin Name |
RAMBO Function |
| 1 |
PG5 ( OC0B ) |
Digital pin 4 (PWM) |
PWM-Ext 6 |
| 2 |
PE0 ( RXD0/PCINT8 ) |
Digital pin 0 (PWM) (RX0) |
USB – serial comms, SER0 3 |
| 3 |
PE1 ( TXD0 ) |
Digital pin 1 (PWM) (TX0) |
USB – serial comms, SER0 4 |
| 4 |
PE2 ( XCK0/AIN0 ) |
|
Ext2 20 |
| 5 |
PE3 ( OC3A/AIN1 ) |
Digital pin 5 (PWM) |
PWM-Ext 5 |
| 6 |
PE4 ( OC3B/INT4 ) |
Digital pin 2 (PWM) |
PWM-Ext 4 |
| 7 |
PE5 ( OC3C/INT5 ) |
Digital pin 3 (PWM) |
Bed Heater |
| 8 |
PE6 ( T3/INT6 ) |
|
Ext2 18 |
| 9 |
PE7 ( CLKO/ICP3/INT7 ) |
|
Ext2 16 |
| 10 |
VCC |
VCC |
VCC |
| 11 |
GND |
GND |
GND |
| 12 |
PH0 ( RXD2 ) |
Digital pin 17 (PWM) (RX2) |
Serial 7 |
| 13 |
PH1 ( TXD2 ) |
Digital pin 16 (PWM) (TX2) |
Serial 8 |
| 14 |
PH2 ( XCK2 ) |
|
Ext2 8 |
| 15 |
PH3 ( OC4A ) |
Digital pin 6 (PWM) |
Fan 1 |
| 16 |
PH4 ( OC4B ) |
Digital pin 7 (PWM) |
Heat 1 |
| 17 |
PH5 ( OC4C ) |
Digital pin 8 (PWM) |
Fan 0 |
| 18 |
PH6 ( OC2B ) |
Digital pin 9 (PWM) |
Heat 0 |
| 19 |
PB0 ( SS/PCINT0 ) |
Digital pin 53 (PWM)(SPI-SS) |
SPI-Ext SS 6 |
| 20 |
PB1 ( SCK/PCINT1 ) |
Digital pin 52 (PWM)(SCK) |
SPI-Ext SCK 5 |
| 21 |
PB2 ( MOSI/PCINT2 ) |
Digital pin 51 (PWM)(MOSI) |
SPI-Ext MOSI 4 |
| 22 |
PB3 ( MISO/PCINT3 ) |
Digital pin 50(MISO) |
SPI-Ext MISO 3 |
| 23 |
PB4 ( OC2A/PCINT4 ) |
Digital pin 10 (PWM) |
Z Min Endstop |
| 24 |
PB5 ( OC1A/PCINT5 ) |
Digital pin 11 (PWM) |
Y Min Endstop |
| 25 |
PB6 ( OC1B/PCINT6 ) |
Digital pin 12 (PWM) |
X Min Endstop |
| 26 |
PB7 ( OC0A/OC1C/PCINT7 ) |
Digital pin 13 (PWM) |
LED, PWM-Ext 3 |
| 27 |
PH7 ( T4 ) |
|
Ext2 6 |
| 28 |
PG3 ( TOSC2 ) |
|
Ext3 7 |
| 29 |
PG4 ( TOSC1 ) |
|
Ext3 5 |
| 30 |
RESET |
RESET |
Reset |
| 31 |
VCC |
VCC |
VCC |
| 32 |
GND |
GND |
GND |
| 33 |
XTAL2 |
XTAL2 |
XTAL2 |
| 34 |
XTAL1 |
XTAL1 |
XTAL1 |
| 35 |
PL0 ( ICP4 ) |
Digital pin 49 |
Y Direction |
| 36 |
PL1 ( ICP5 ) |
Digital pin 48 |
X Direction |
| 37 |
PL2 ( T5 ) |
Digital pin 47 |
Z Direction |
| 38 |
PL3 ( OC5A ) |
Digital pin 46 (PWM) |
MX3-5 Direction |
| 39 |
PL4 ( OC5B ) |
Digital pin 45 (PWM) |
MX2-5 Direction |
| 40 |
PL5 ( OC5C ) |
Digital pin 44 (PWM) |
MX1-5 Direction |
| 41 |
PL6 |
Digital pin 43 |
E0 Direction |
| 42 |
PL7 |
Digital pin 42 |
E1 Direction |
| 43 |
PD0 ( SCL/INT0 ) |
Digital pin 21 (SCL) |
I2C SCL |
| 44 |
PD1 ( SDA/INT1 ) |
Digital pin 20 (SDA) |
I2C SDA |
| 45 |
PD2 ( RXDI/INT2 ) |
Digital pin 19 (RX1) |
Serial 5 |
| 46 |
PD3 ( TXD1/INT3 ) |
Digital pin 18 (TX1) |
Serial 6 |
| 47 |
PD4 ( ICP1 ) |
|
Ext2 14 |
| 48 |
PD5 ( XCK1 ) |
|
Ext2 12 |
| 49 |
PD6 ( T1 ) |
|
Ext2 10 |
| 50 |
PD7 ( T0 ) |
Digital pin 38 |
Digipot SS |
| 51 |
PG0 ( WR ) |
Digital pin 41 |
X Microstep2 |
| 52 |
PG1 ( RD ) |
Digital pin 40 |
X Microstep1 |
| 53 |
PC0 ( A8 ) |
Digital pin 37 |
X Step |
| 54 |
PC1 ( A9 ) |
Digital pin 36 |
Y Step |
| 55 |
PC2 ( A10 ) |
Digital pin 35 |
Z Step |
| 56 |
PC3 ( A11 ) |
Digital pin 34 |
E0 Step |
| 57 |
PC4 ( A12 ) |
Digital pin 33 |
E1 Step |
| 58 |
PC5 ( A13 ) |
Digital pin 32 |
MX1-4 Step |
| 59 |
PC6 ( A14 ) |
Digital pin 31 |
MX2-4 Step |
| 60 |
PC7 ( A15 ) |
Digital pin 30 |
Z Max, MX3-4 Step |
| 61 |
VCC |
VCC |
VCC |
| 62 |
GND |
GND |
GND |
| 63 |
PJ0 ( RXD3/PCINT9 ) |
Digital pin 15 (RX3) |
Serial 9 |
| 64 |
PJ1 ( TXD3/PCINT10 ) |
Digital pin 14 (TX3) |
Serial 10 |
| 65 |
PJ2 ( XCK3/PCINT11 ) |
|
Ext2 9 |
| 66 |
PJ3 ( PCINT12 ) |
|
Ext2 11 |
| 67 |
PJ4 ( PCINT13 ) |
|
Ext2 15 |
| 68 |
PJ5 ( PCINT14 ) |
|
Ext2 17 |
| 69 |
PJ6 ( PCINT 15 ) |
|
Ext2 19 |
| 70 |
PG2 ( ALE ) |
Digital pin 39 |
Y Microstep2 |
| 71 |
PA7 ( AD7 ) |
Digital pin 29 |
X Enable |
| 72 |
PA6 ( AD6 ) |
Digital pin 28 |
Y Enable |
| 73 |
PA5 ( AD5 ) |
Digital pin 27 |
Z Enable |
| 74 |
PA4 ( AD4 ) |
Digital pin 26 |
E0 Enable |
| 75 |
PA3 ( AD3 ) |
Digital pin 25 |
E1 Enable |
| 76 |
PA2 ( AD2 ) |
Digital pin 24 |
X Max, MX3-3 Enable |
| 77 |
PA1 ( AD1 ) |
Digital pin 23 |
Y Max, MX2-3 Enable |
| 78 |
PA0 ( AD0 ) |
Digital pin 22 |
MX1-3 Enable |
| 79 |
PJ7 |
|
Ext2 13 |
| 80 |
VCC |
VCC |
VCC |
| 81 |
GND |
GND |
GND |
| 82 |
PK7 ( ADC15/PCINT23 ) |
Analog pin 15 |
Y Microstep1 |
| 83 |
PK6 ( ADC14/PCINT22 ) |
Analog pin 14 |
Z Microstep1 |
| 84 |
PK5 ( ADC13/PCINT21 ) |
Analog pin 13 |
Z Microstep2 |
| 85 |
PK4 ( ADC12/PCINT20 ) |
Analog pin 12 |
E0 Microstep2 |
| 86 |
PK3 ( ADC11/PCINT19 ) |
Analog pin 11 |
E0 Microstep1 |
| 87 |
PK2 ( ADC10/PCINT18 ) |
Analog pin 10 |
E1 Microstep2 |
| 88 |
PK1 ( ADC9/PCINT17 ) |
Analog pin 9 |
E1 Microstep1 |
| 89 |
PK0 ( ADC8/PCINT16 ) |
Analog pin 8 |
Analog-Ext 1 |
| 90 |
PF7 ( ADC7/PCINT15 ) |
Analog pin 7 |
Thermistor 3, Analog-Ext 2 |
| 91 |
PF6 ( ADC6/PCINT14 ) |
Analog pin 6 |
Analog-Ext 3 |
| 92 |
PF5 ( ADC5/TMS ) |
Analog pin 5 |
Analog-Ext 4 |
| 93 |
PF4 ( ADC4/TMK ) |
Analog pin 4 |
Analog-Ext 5 |
| 94 |
PF3 ( ADC3 ) |
Analog pin 3 |
Analog-Ext 6 |
| 95 |
PF2 ( ADC2 ) |
Analog pin 2 |
Thermistor 2 |
| 96 |
PF1 ( ADC1 ) |
Analog pin 1 |
Thermistor 1 |
| 97 |
PF0 ( ADC0 ) |
Analog pin 0 |
Thermistor 0 |
| 98 |
AREF |
Analog Reference |
|
| 99 |
GND |
GND |
GND |
| 100 |
AVCC |
VCC |
VCC |
