A000069

A000069 Datasheet


Code A000069

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OVERVIEW
• pinout added SDA and SCL pins that are near to the AREF pin and two other new pins placed near to the RESET pin, the IOREF that allow the shields to adapt to the voltage provided from the board. In future, shields will be compatible both with the board that use the AVR, which operate with 5V and with the Arduino Due that operate with 3.3V. The second one is a not connected pin, that is reserved for future purposes.
• Stronger RESET circuit.

TECH SPECS

Microcontroller Operating Voltage Input Voltage recommended Input Voltage limits Digital I/O Pins Analog Input Pins DC Current per I/O Pin DC Current for 3.3V Pin Flash Memory SRAM EEPROM Clock Speed USB Host Chip Length Width Weight

ATmega2560 5V 54 of which 15 provide PWM output 16 40 mA 50 mA 256 KB of which 8 KB used by bootloader 8 KB 4 KB 16 MHz MAX3421E mm 36 g
• Power

The Arduino MEGA ADK can be powered via the USB connection or with an external power supply. The power source is selected automatically.

External non-USB power can come either from an AC-to-DC adapter wall-wart or battery. The adapter can be connected by plugging a 2.1mm center-positive plug into the board's power jack. Leads from a battery can be inserted in the Gnd and Vin pin headers of the POWER connector.

NB Because the MEGA ADK is a USB Host, the phone will attempt to draw power from it when it needs to charge. When the ADK is powered over USB, 500mA total is available for the phone and board.The external power regulator can supply up to 1500mA. 750mA is available for the phone and MEGA ADK board. An additional 750mA is allocated for any actuators and sensors attached to the board. A power supply must be capable of providing 1.5A to use this much current.

The board can operate on an external supply of to 16 volts. If supplied with less than 7V, however, the 5V pin may supply less than five volts and the board may be unstable. If using more than 12V, the voltage regulator may overheat and damage the board. The recommended range is 7 to 12 volts.

The power pins are as follows:
• VIN. The input voltage to the Arduino board when it's using an external power source as opposed to 5 volts from the USB connection or other regulated power source . You can supply voltage through this pin, or, if supplying voltage via the power jack, access it through this pin.
• 5V. This pin outputs a regulated 5V from the regulator on the board. The board can be supplied with power either from the DC power jack 7 12V , the USB connector 5V , or the VIN pin of the board Supplying voltage via the 5V or 3.3V pins bypasses the regulator, and can damage your board. We don't advise it.
• 3V3. A volt supply generated by the regulator. Maximum current draw is 50 mA.
• GND. Ground pins.
• IOREF. This pin on the Arduino board provides the voltage reference with which the
microcontroller operates. A properly configured shield can read the IOREF pin voltage and select the appropriate power source or enable voltage translators on the outputs for working with the 5V or 3.3V.

Memory

The MEGA ADK has 256 KB of flash memory for storing code of which 8 KB is used for the bootloader , 8 KB of SRAM and 4 KB of EEPROM which can be read and written with the EEPROM library .

Input and Output

Each of the 50 digital pins on the MEGA ADK can be used as an input or output, using pinMode ,digitalWrite , and digitalRead functions. They operate at 5 volts. Each pin can provide or receive a maximum of 40 mA and has an internal pull-up resistor disconnected by default of 20-50 kOhms. In addition, some pins have specialized functions:
• Serial 0 RX and 1 TX Serial 1 19 RX and 18 TX Serial 2 17 RX and 16 TX Serial 3 15 RX and 14 TX . Used to receive RX and transmit TX TTL serial data. Pins 0 and 1 are also connected to the corresponding pins of the ATmega8U2 Serial chip.
• External Interrupts 2 interrupt 0 , 3 interrupt 1 , 18 interrupt 5 , 19 interrupt 4 , 20 interrupt 3 , and 21 interrupt These pins can be configured to trigger an interrupt on a low value, a rising or falling edge, or a change in value. See the attachInterrupt function for details.
• PWM 2 to 13 and 44 to Provide PWM output with the analogWrite function.
• SPI 50 MISO , 51 MOSI , 52 SCK , 53 SS . These pins support SPI communication using
theSPI library. The SPI pins are also broken out on the ICSP header, which is physically compatible with the Uno, Duemilanove and Diecimila.
• USB Host MAX3421E.

The MAX3421E comunicate with Arduino with the SPI bus. So it uses the following pins:
• Digital 7 RST , 50 MISO , 51 MOSI , 52 SCK . NB:Please do not use Digital pin 7 as input or output because is used in the comunication with MAX3421E
• Non broken out on headers PJ3 GP_MAX , PJ6 INT_MAX , PH7 SS .
• LED 13.There is a LED connected to digital pin When the pin is HIGH value,
the LED is on, when the pin is LOW, it's off.
• TWI 20 SDA and 21 SCL . Support TWI communication using the Wire library. Note that
these pins are not in the same location as the TWI pins on the Duemilanove or Diecimila.

The MEGA ADK has 16 analog inputs, each of which provide 10 bits of resolution i.e. 1024 different values . By default they measure from ground to 5 volts, though is it possible to change the upper end of their range using the AREF pin and analogReference function.

There are a couple of other pins on the board:
• AREF. Reference voltage for the analog inputs. Used with analogReference .
• Reset. Bring this line LOW to reset the microcontroller. Typically used to add a reset
button to shields which block the one on the board.

Communication

The Arduino MEGA ADK has a number of facilities for communicating with a computer, another Arduino, or other microcontrollers. The ATmega2560 provides four hardware UARTs for TTL 5V serial communication. An ATmega8U2 on the board channels one of these over USB and provides a virtual com port to software on the computer Windows machines will need a .inf file, but OSX and Linux machines will recognize the board as a COM port automatically. The Arduino software includes a serial monitor which allows simple textual data to be sent to and from the board. The RX and TX LEDs on the board will flash when data is being transmitted via the ATmega8U2/16U2 chip and USB connection to the computer but not for serial communication on pins 0 and

A SoftwareSerial library allows for serial communication on any of the MEGA ADK's digital pins.

The ATmega2560 also supports TWI and SPI communication. The Arduino software includes a Wire library to simplify use of the TWI bus see the Wire library for details. For SPI communication, use the SPI library.

The USB host interface given by MAX3421E IC allows the Arduino MEGA ADK to connect and interact to any type of device that have a USB port. For example, allows you to interact with many types of phones, controlling Canon cameras, interfacing with keyboard, mouse and games controllers as Wiimote and PS3.

Programming
More datasheets: S29WS512R0SBHW200 | S29WS512R0SBHW000 | S29WS256RAABHW000 | S29WS256R0SBHW000 | MAL213828158E3 | MAL213838158E3 | 43-00099 | 43-00101 | ET80DT004 | 76002065


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Datasheet ID: A000069 518301