Product Descriptions
The MEGA2560 2012 R3 version is a new version of the MEGA series controller, which has the following differences from the 2011 version:
1. The ATMEGA8U2 of the 2011 version is replaced by the ATMEGA16U2 chip, and the ISP FLASH capacity is doubled to obtain more powerful function expansion, which is necessary for development. In addition to providing the traditional USB to serial port function, the ATMEGA16U2 also allows users to program and define other functions, such as configuring the USB port as a mouse, keyboard, game joystick, camera, etc. Of course, these applications still require the Duino team to publish specific implementation plans.
Based on the 2011 version, the external interface adds SDA and SCL (located on the left side of AREF). The IOREF interface can provide a voltage reference for the Shield. And in order to consider compatibility with future series products, please reserve a port on the left side of IOREF.
Compared with the 2011 version, the RESET circuit has been improved. Prevent accidental resetting of RESET and make the RESET circuit more stable.
Mega Introduction
Mega is a microcontroller development board with ATmega2560 as the core. It has 54 sets of digital I/O input/output terminals (14 of which can be used for PWM output), 16 sets of analog input terminals, 4 sets of UART (hardware serial port), and uses a 16 MHz crystal oscillator. Due to the presence of a boot loader, the program can be downloaded directly via USB without the need for other external programmers. The power supply can be provided directly by USB, or an AC-DC adapter and battery can be used as an external power supply.
Due to the open source code and the use of Java concepts in the C language development environment (cross-platform), rduino's peripheral modules and applications have developed rapidly. The main reason for attracting artists to use rduino is the ability to communicate quickly with software such as Flash or use rduino language for processing to create multimedia interactive works. The rduino development IDE interface is based on the principle of open source code, allowing you to download it for free and use it for special production, school teaching, motor control, interactive works, etc.
Power Design
The power system of MEGA has two options: direct USB power or external power. The choice of power source switches automatically. The external power source can choose AC to DC adapter or battery. The maximum voltage range of this control board is 6V~12V. However, if the voltage provided is less than 6V, the I/O port may not be able to provide 5V voltage, resulting in instability; if the voltage provided is greater than 12V, the voltage regulator may encounter overheating protection and may even damage MEGA. Therefore, the recommended working power supply is 6.5-12V, and the recommended power supply is 7V or 12V.
Product Specifications
| Microcontroller | ATmega2560 |
| Operating voltage | 5V |
| Input voltage (recommended) | 7-12V |
| Input voltage (limited) | 6-20V |
| Digital I/O pins | 54 (15 of which provide PWM outputs) |
| Analog input pins | 16 |
| DC current per I/O pin | 40 mA |
| DC current per 3.3V pin | 50 mA |
| Flash memory | 256 KB, of which 8 KB is used by the bootloader |
| SRAM | 8 KB |
| EEPROM family | 4 KB |
| Clock speed | 16 MHz |
Product Photos
