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Arduino Mega 2560 R3

Microcontroller board based on the ATmega2560 featuring 54 digital input/output pins (of which 15 can be used as PWM outputs), 16 analog inputs, 4 hardware UART serial ports, a 16 MHz crystal oscillator, USB connection, a power jack, an ICSP header, and a reset button.

Aliase:Mega, Mega 2560, ATmega2560 Board, Arduino Mega, A000067
Arduino Mega 2560 Official Full Pinout (PDF)Arduino Mega 2560 Official Documentation & SchematicsATmega2560 Datasheet (Microchip PDF)

Board Overview & Layout

Board Layout
ISCPISCP1X2

x1 Stiftleisten Links & Rechts (Power, Analog & Digital)

50 Pins
MEGA2560 NC IOREF RESET 3V3 5V GND GND VIN A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 A15 D21 / SCL D20 / SDA AREF GND ~D13 ~D12 ~D11 ~D10 ~D9 ~D8 ~D7 ~D6 ~D5 ~D4 ~D3 ~D2 ~D1 / TX0 ~D0 / RX0 D14 / TX3 D15 / RX3 D16 / TX2 D17 / RX2 D18 / TX1 D19 / RX1 D20 / SDA D21 / SCL
Pinout Table50
PinSignal / NameTypeAlternative Functions
1NCNC
Not Connected (Reserved)
2IOREFPower
I/O Reference Voltage (+5.0V)
3RESETReset
MCU Reset (Active Low)RESET
43V3Power
+3.3V Power Output (Up to 50mA)
55VPower
+5V Regulated Power Output
6GNDGround
Ground (0V)
7GNDGround
Ground (0V)
8VINPower
Input Voltage (7V - 12V Unregulated)
9A0Analog
Analog Input 0ADC0PF0D54
10A1Analog
Analog Input 1ADC1PF1D55
11A2Analog
Analog Input 2ADC2PF2D56
12A3Analog
Analog Input 3ADC3PF3D57
13A4Analog
Analog Input 4ADC4PF4TCKD58
14A5Analog
Analog Input 5ADC5PF5TMSD59
15A6Analog
Analog Input 6ADC6PF6TDOD60
16A7Analog
Analog Input 7ADC7PF7TDID61
17A8Analog
Analog Input 8ADC8PK0PCINT16D62
18A9Analog
Analog Input 9ADC9PK1PCINT17D63
19A10Analog
Analog Input 10ADC10PK2PCINT18D64
20A11Analog
Analog Input 11ADC11PK3PCINT19D65
21A12Analog
Analog Input 12ADC12PK4PCINT20D66
22A13Analog
Analog Input 13ADC13PK5PCINT21D67
23A14Analog
Analog Input 14ADC14PK6PCINT22D68
24A15Analog
Analog Input 15ADC15PK7PCINT23D69
25D21 / SCLDigital
Digital Pin 21I2C Serial ClockSCLPD0INT0
26D20 / SDADigital
Digital Pin 20I2C Serial DataSDAPD1INT1
27AREFAnalog
Analog Reference VoltageAREF
28GNDGround
Ground (0V)
29~D13Digital
Digital Pin 13PWMLED_BUILTINPB7OC0AOC1CPCINT7
30~D12Digital
Digital Pin 12PWMPB6OC1BPCINT6
31~D11Digital
Digital Pin 11PWMPB5OC1APCINT5
32~D10Digital
Digital Pin 10PWMPB4OC2APCINT4
33~D9Digital
Digital Pin 9PWMPH6OC2B
34~D8Digital
Digital Pin 8PWMPH5OC4C
35~D7Digital
Digital Pin 7PWMPH4OC4B
36~D6Digital
Digital Pin 6PWMPH3OC4A
37~D5Digital
Digital Pin 5PWMPE3OC3AAIN1
38~D4Digital
Digital Pin 4PWMPG5OC0B
39~D3Digital
Digital Pin 3PWMPE5OC3CINT5
40~D2Digital
Digital Pin 2PWMPE4OC3BINT4
41~D1 / TX0Digital
Digital Pin 1TX0 (UART0 Transmitter)PE1TXD0PDO
42~D0 / RX0Digital
Digital Pin 0RX0 (UART0 Receiver)PE0RXD0PDIPCINT8
43D14 / TX3Digital
Digital Pin 14TX3 (UART3 Transmitter)PJ1TXD3PCINT10
44D15 / RX3Digital
Digital Pin 15RX3 (UART3 Receiver)PJ0RXD3PCINT9
45D16 / TX2Digital
Digital Pin 16TX2 (UART2 Transmitter)PH1TXD2
46D17 / RX2Digital
Digital Pin 17RX2 (UART2 Receiver)PH0RXD2
47D18 / TX1Digital
Digital Pin 18TX1 (UART1 Transmitter)PD3TXD1INT3
48D19 / RX1Digital
Digital Pin 19RX1 (UART1 Receiver)PD2RXD1INT2
49D20 / SDADigital
Digital Pin 20I2C Serial DataSDAPD1INT1
50D21 / SCLDigital
Digital Pin 21I2C Serial ClockSCLPD0INT0

x2 Stiftleiste Unten (D22 - D53, 5V, GND)

36 Pins
2×18 Female Socket (2.54mm)1+5V3D225D247D269D2811D3013D3215D3417D3619D3821D4023D4225~D4427~D4629D4831D5033D5235GND2+5V4D236D258D2710D2912D3114D3316D3518D3720D3922D4124D4326~D4528D4730D4932D5134D5336GNDpinoutdb.org
Pinout Table36
PinSignal / NameTypeAlternative Functions
1+5VPower
+5V Regulated Power Output
2+5VPower
+5V Regulated Power Output
3D22Digital
Digital Pin 22PA0AD0
4D23Digital
Digital Pin 23PA1AD1
5D24Digital
Digital Pin 24PA2AD2
6D25Digital
Digital Pin 25PA3AD3
7D26Digital
Digital Pin 26PA4AD4
8D27Digital
Digital Pin 27PA5AD5
9D28Digital
Digital Pin 28PA6AD6
10D29Digital
Digital Pin 29PA7AD7
11D30Digital
Digital Pin 30PC7A15
12D31Digital
Digital Pin 31PC6A14
13D32Digital
Digital Pin 32PC5A13
14D33Digital
Digital Pin 33PC4A12
15D34Digital
Digital Pin 34PC3A11
16D35Digital
Digital Pin 35PC2A10
17D36Digital
Digital Pin 36PC1A9
18D37Digital
Digital Pin 37PC0A8
19D38Digital
Digital Pin 38PD7T0
20D39Digital
Digital Pin 39PG2ALE
21D40Digital
Digital Pin 40PG1~RD
22D41Digital
Digital Pin 41PG0~WR
23D42Digital
Digital Pin 42PL7
24D43Digital
Digital Pin 43PL6
25~D44Digital
Digital Pin 44PWMPL5OC5C
26~D45Digital
Digital Pin 45PWMPL4OC5B
27~D46Digital
Digital Pin 46PWMPL3OC5A
28D47Digital
Digital Pin 47PL2T5
29D48Digital
Digital Pin 48PL1ICP5
30D49Digital
Digital Pin 49PL0ICP4
31D50Digital
Digital Pin 50SPI CIPO / MISOPB3PCINT3
32D51Digital
Digital Pin 51SPI COPI / MOSIPB2PCINT2
33D52Digital
Digital Pin 52SPI SCKPB1PCINT1
34D53Digital
Digital Pin 53SPI ~SSPB0PCINT0
35GNDGround
Ground (0V)
36GNDGround
Ground (0V)

ICSP1 Header (ATmega16U2 USB Controller)

6 Pins
2×3 Female Socket (2.54mm)1CIPO3SCK5RESET2+5V4COPI6GNDpinoutdb.org
Pinout Table6
PinSignal / NameTypeAlternative Functions
1CIPODigital
SPI CIPO / MISOPB3ATmega16U2
2+5VPower
Power Supply (+5.0V)
3SCKDigital
SPI SCKPB1ATmega16U2
4COPIDigital
SPI COPI / MOSIPB2ATmega16U2
5RESETReset
ATmega16U2 Reset (Active Low)PC1
6GNDGround
Ground (0V)

ICSP Header (ATmega2560 Main MCU)

6 Pins
2×3 Female Socket (2.54mm)1CIPO3SCK5RESET2+5V4COPI6GNDpinoutdb.org
Pinout Table6
PinSignal / NameTypeAlternative Functions
1CIPODigital
SPI CIPO / MISOPB3PCINT3
2+5VPower
Power Supply (+5.0V)
3SCKDigital
SPI SCKPB1PCINT1
4COPIDigital
SPI COPI / MOSIPB2PCINT2
5RESETReset
Microcontroller Reset (Active Low)RESET
6GNDGround
Ground (0V)

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