Seeeduino Mega

Seeeduino Mega is a powerful microcontroller derived from Arduino Mega. It features ATmega2560 processor which brings a large number of I/O pins, as much as 70 digital I/O, 16 analog inputs, 14 PWM, and 4 hardware serial ports. Compared to Arduino Mega, we shrunk the volume of Arduino Mega by at least 30% and made it 100% compatible with Seeed Shield products. And as a member of Seeeduino series, Seeeduino Mega inherits deliberate details from Seeeduino, like selectable operating voltage(3.3V/5V), right angle reset button, and so on.

Model:ARD121D2P

Specifications

Overall Specifications

Operating Voltage: 5V / 3.3V
Operating Temperature: -20~70℃
Input Voltage: 6-20V
DC Current per IO pin: 40mA
Flash Memory: 256k
SRAM: 8k
EEPROM: 4k
Dimensions: 71*53*11.3 mm
Power Jack: 2.54mm, 2pin JST

Peripheral Features

Peripheral Features are multiplexed with General Purpose Input/Output [GPIO] Pins, for multiplexing and assignment please check Pin Definitions. For more details on the alternate pin functions please refer to the Atmega2560 datasheet.

8-Bit Timers/Counters: 2
16-Bit Timers/Counters: 4
8-Bit Pulse Width Modulator (PWM): 4
Programmable PWM Channels: 12
Programmable PWM Resolution (Bits): 2 -16
Analog to Digital Input Channels (ADC): 16
ADC Resolution (Bits): 10
Programmable USART Channels: 4
On-Chip Analog Comparator: 1
Master/Slave SPI Interface: 1
Byte Oriented 2 -Wire Serial Interface: 1

Interface

The following diagram illustrates the placement of important integrated circuits, indicator LEDs, connectors common to all Arduino based development platforms and the ones specific to Seeeduino Mega.

NOTES

Label [5] The Seeeduino Mega uses a 4 Position mini-Type B Jack while the rest of the Arduino family uses standard 4 Position Type B Jack. The Arduino uses circular Power Jack.
Label[9] The Seeeduino Mega uses a 2 Pin JST connector for the power supply while the rest of the Arduino family uses coaxial power plugs.
Label[3] For the Reset button the Seeeduino Mega uses a an edge mounted push button while other Arduino based platforms uses a four legged tack switch .
Yellow Labels are indicator LEDs.
Blue Labels are mode selector and reset switches.
Brown Labels are items that are common to the Arduino family; this makes the Seeeduino Mega compatible with most Arduino shields.
Red Labels are the things that add the MEGA in the Seeeduino, the set includes additional ADC input pins and a bunch of bidirectional IO pins.

Reference

Pin	Name	Function and Note
1	Reset	A switch that would reset the SeeeduinoMega
2	3.3V	3.3V Source
3	5V	5V Source
4	Gnd	Ground
5	Vin	A connection to the main source, this is used when the shield's supply is to be taken from the main power source
0~7	ADC / GPIO:PF0-PF7	Analog to Digital channels multiplexed with Port-F, used to interface with analog sensors like potentiometers, voltage , current, temperature, pressure, humidity sensors as well as analog gyroscopes and accelerometers
8~9	GPIO:PH5-PH6	General Purpose Input Output Pins
10~13	GPIO:PB4-PB7	General Purpose Input Output Pins
14	GND	A connection to the ground
15	AREF	The analog reference used as reference for the Seeeduino Mega’s ADC channels, Analog reference is decoupled to the ground using a capacitor for stability purposes.
0	GPIO:PE0/RX0	Receive channel for USART0
1	GPIO:PE1/TX0	Transmit channel for USART0
2~3	GPIO:PE4-PE5	General Purpose Input Output Pins
4	GPIO:PG5	General Purpose Input Output Pin
5	GPIO:PE3	General Purpose Input Output Pin
6~7	GPIO:PH3-PH4	General Purpose Input Output Pins
	ICSP
8~15	ADC / GPIO:PK0-PK7	8 Analog to Digital channels multiplexed with Port-K
1	RXD1 / GPIO:PD2	Receive channel for USART1
2	TXD1 / GPIO:PD3	Transmit channel for USART1
3	RXD2 / GPIO:PH0	Receive channel for USART2
4	TXD2 / GPIO:PH1	Transmit channel for USART2
5	RXD3 / GPIO:PJ0	Receive channel for USART3
6	TXD3 / GPIO:PJ1	Transmit channel for USART3
I2C		Also known as the Two Wire Interface, I2C is an industry standard communication protocol that is used to communicate with ADCs, EEPROMs, DACs, sensors, and microcontrollers.
1	Vcc
2	GND
3	SCL / GPIO:PD0	I2C-Clock
4	SDA / GPIO:PD1	I2C-Serial Data
22~29	GPIO:PA0-PA7	General Purpose Input Output Pins
30-37	GPIO:PC0-PC7	General Purpose Input Output Pins
38	GPIO:PD7	General Purpose Input Output Pin
39~41	GPIO:PG2 - PG0	General Purpose Input Output Pins
42~45	GPIO:PL7 - PL4	General Purpose Input Output Pins
46~49	GPIO:PL3 - PL0	General Purpose Input Output Pins
SPI
50	MISO / GPIO:PB3	SPI - Master In Slave Out
51	MOSI / GPIO:PB2	SPI - Master Out Slave In
52	SCK / GPIO:PB1	SPI - Clock
53	GPIO:PB0	General Purpose Input Output Pin
PH2	GPIO:PH2	General Purpose Input Output Pin
PH7	GPIO:PH7	General Purpose Input Output Pin
PJ2~PJ7	GPIO:PJ2-PJ7	General Purpose Input Output Pins
PD4~PD6	GPIO:PD4-PD6	General Purpose Input Output Pins
PG4~PG3	GPIO:PG4-PG3	General Purpose Input Output Pins
PE7	GPIO:PE7	General Purpose Input Output Pin
PE6	GPIO:PE6	General Purpose Input Output Pin
PE2	GPIO:PE2	General Purpose Input Output Pin