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MEGA2560 2012 R3
- 1. Replacing ATMEGA8U2 with ATMEGA16U2 chip, the ISP FLASH capacity is doubled, which is convenient for more powerful function expansion and development needs. In addition to the traditional USB-to-serial function, ATMEGA16U2 can also allow users to program and define other functions, such as the USB port can be configured as a mouse, keyboard, joystick, camera, etc. Of course, these applications are still waiting for the duino team to come Publish specific implementation plans.
- 2. The external interface adds SDA and SCL (located on the left side of AREF) based on the 2011 version. The IOREF interface can provide a voltage reference to the Shield. And consider to reserve a port on the left side of IOREF for future series product compatibility.
- 3. The RESET circuit is improved compared to the 2011 version. To prevent accidental reset of RESET, the RESET circuit is more stable.
Power Design
Mega’s power supply system has two options, USB direct power supply or external power supply. The selection of power supply will switch automatically. For external power supply, you can choose AC-to-DC adapter or battery. The limit voltage range of this control board is 6V~12V, but if the supplied voltage is less than 6V, the I/O port may not be able to supply the voltage up to 5V, so there will be inconsistencies. Stable; if the supplied voltage is greater than 12V, the voltage regulator may be overheated and more likely to damage the MEGA. Therefore, the recommended operating power supply is 6.5~12V, and the recommended power supply is 7V or 12V.
- Microcontroller ATmega 2560
- Operating Voltage 5V
- Input Voltage (recommended) 7-12V
- Input Voltage (limits) 6-20V
- Digital I/O Pins 54 (of which 15 provide PWM output)
- Analog Input Pins 16
- DC Current per I/O Pin 40 mA
- DC Current for 3.3V Pin 50 mA
- Flash Memory 256 KB of which 8 KB used by bootloader
- SRAM 8KB
- EEPROM 4KB
- Clock Speed 16MHz
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