MattairTech MT-DB-U4, User Manual

Page: 4 / 38

MT-DB-U4 User Guide
Overview
Overview
Introduction
The MT­DB­U4 is a development board for the Atmel ATmega32U4 USB microcontroller. The
board has 40 pins in a dual inline configuration with 100 mil pin spacing and 700 mil row spacing
which allows for easy mounting on a breadboard. It includes a mini USB connector, status LED,
16MHz crystal, reset button, HWB boot jumper, and ISP header pads. A bootloader comes
preinstalled which allows programming of the chip over USB without an external programmer. An ISP
header is available which can be used with an external programmer. This header can be reconfigured
to allow the MT­DB­U4 itself to be used as an ISP programmer (hex file available on website), or to be
used as a SPI master or slave. The board can be powered via USB at 5V or it can be externally
powered (3V ­ 5.5V). All pins are routed to headers, including those used by on­board hardware. The
chip can be clocked externally, and the board is compatible with HV programming. The USB
connections are also routed to header pins, which allows for panel­mount USB connectors. The PCB
is high­quality with ENIG (gold­plated) finish, red soldermask, and white screenprinting showing the
pinout and Arduino pin numbering. There are two 3mm mounting holes (~5mm pad). It measures
approximately 2.1” x 0.9” (52mm x 23mm) and is 0.062” (1.6mm) thick.
MT­DB­U4 Features
●
ATmega32U4 USB microcontroller
●
32KB FLASH, 2.5KB SRAM, 1KB EEPROM
●
12 10­bit ADC channels (1 used by LED which can be disconnected)
●
Serial USART, SPI, and TWI (I2C) communications
●
4 timers with 14 PWM channels (up to 7 simultaneous)
●
Arduino compatible (now supports IDE 1.6.7 and boards manager)
●
CDC (Arduino/AVRDUDE) or DFU (FLIP) bootloader preinstalled
●
Bitlash preinstalled (Arduino command shell)
●
ISP header (program chip using external programmer)
●
16MHz crystal
●
Green Status LED
●
Reset button
●
Bootloader jumper
●
Mini USB connector
●
Powered by USB or external power supply
●
5V (USB) or 3V ­ 5.5V (external)
●
All pins routed to headers (including those used by on­board hardware)
●
Can be mounted on a breadboard
●
USB pins routed to header pins (for panel­mount USB connector)
●
Inductor on analog supply with separate ground pin
●
High­quality PCB with gold­plated finish
●
Two 3mm mounting holes (~5mm pad)
●
Measures approx. 2.1” x 0.9” (52mm x 23mm) and 0.062” (1.6mm) thick.
December 30, 2015 4 http://www.mattairtech.com/