Atmel ATMEGA32U4, AVR microcontroller module with USB interface



U4DIL is a tiny interface module for an Atmel AVR micro controller with USB interface in TQFP44 casing. The module fits to an ordinary 40 pin dual-in-line socket. The module is helpful in experiments, development and prototyping with USB-AVR microcontrollers.
  • assembled with Atmel AVR microcontroller ATMEGA32U4
  • standard 40 pin dual-inline format (0.6 inch row distance)
  • any microcontroller port (except USB data and oscillator) is available by the dual in line pins
  • flexibel power supplement by USB or external
  • oscillator socket onboard (suitable for crystal, 2- and 3-pin ceramic resonator)
  • all components for basic operation onboard (such as resistors and buffer capacitors)
  • ESD protected mini-USB connector
  • in-system programming (6 pin Atmel ISP standard)
  • directly supported by AVR Studio 4 and 5

The module can be applied in any development system, such as Atmel AVR Studio, WinAVR and IAR Embedded Workbench® for Atmel AVR.

For In-System-Programming the Atmel AVRISP MKII and all the compatible devices can be used.

The microcontroller can be programmed in three ways:

  • By the USB interface with the present bootloader and the application program "Flip" from Atmel.
  • By the in-system programming connector on the board and a suitable programming device, such as Atmel AVRISP MKII (or compatible).
  • Programming and debugging by JTAG interface and a suitable debugging device such as Atmel AVRJTAG MKII (or compatible such as Kee AVR JTAG MKII from Kee Electronics). The required ports are available by the DIL pins.

Further information:

New revision 2.0 with following improvements:

  • ESD protected USB plug
  • pullup resistor on reset and HWB pin
  • pin 4 is now shield of USB connector


You will find an overview about all USB-AVR modules here...

Technical Data

Products and Prices

The U4DIL module is available as assembled and approved device or as construction kit, equipped with ATMEGA32U4. Please note, that the construction will be delivered unchecked. 

PCB (not assembled)

the basic material

Construction Kit

assemble what you need


checked and ready to use

This set contains:
  • printed circuit board (current revision),
    not assembled
This set contains:
  • printed circuit board,
    assembled with ATMEGA32U4 and all SMD components (unchecked)
  • all wired components
  • crystal 16.000MHz
This set contains:
  • assembled and approved device (full equipped) with ATMEGA32U4
  • crystal 16.000MHz
Price: Euro 8.00 Price: Euro 24.00 Price: Euro 25.00
Shipping cost category: A Shipping cost category: B Shipping cost category: B
Order number: U4D01 Order number: U4D02 Order number: U4D03
deliverable deliverable deliverable

USB Cable

suitable for the device


Technical data:
  • plug USB-A
  • plug USB-mini
  • USB 2.0
  • length 1.8m
Price: Euro 2.00    
Shipping cost category: B    
Order number: UXD02    

All prices inclusive german VAT, without shipping.

Shipping costs are calculated as real costs.

How to order and pay

You can order via E-Mail or FAX. Please give Your invoice and delivery address.

Order by E-Mail:
Order by FAX: +49-7541-81483

Delivery is only possible by prepayment! You will get a preliminary invoice as PDF file via E-Mail, which contains bank transfer and Paypal information. After payment the goods will be delivered.

We apologize, that we can't offer you a more comfortable way for order and payment in the moment.

More informationen about order and payment...


The following free downloads are available:



File Size


Manual (english), PDF file 1 (2011-07-11) 2,0 MB U4DIL_Manual.pdf
Old: Manual Rev. 1.1 (english), PDF file 19 (2010-09-07) 1.9 MByte U4DIL_Rev11_Manual.pdf
Programming Examples beta 2 (2011-08-02) 6.1 MByte UxDIL_Source_Beta2.zip
Module Test: Software to check the ports and the USB communication
Software for Windows® including drivers and firmware files for all supported microcontrollers
(Windows 7 to 10)
1.8.1 (2019-01-03) 7.8 MByte Setup_UxDIL_Check.exe
Atmel FLIP driver for 64Bit Windows 3.4.2 161 kByte atmel-flip-3.4.2-signed-driver.zip
Microsoft USBView for Windows 96 kByte usbview.exe
Microsoft USBView for Windows 6.0.6000.16386 77 kByte usbview_V6.exe

The purchase of a kit or assembled device contains access to an extended software library
(in preparation, not available yet).


You will find information and downloads for software modules and drivers with the following links.

How to reflash Atmel bootloader (local)

Atmel AVR Tools and Software


Atmel Corporation, AVR data sheets


Atmel Application Note AVR282: Information about "Atmel FLIP" http://www.atmel.com/dyn/resources/prod_documents/doc7769.pdf

Dean Cameras LUFA


Teensy USB Development Board


V-USB, Virtual USB Port for AVR microcontroller http://www.obdev.at/products/vusb/index.html 
WinAVR, GCC development environment http://winavr.sourceforge.net/
LibUSB-Win32, USB drivers for Microsoft Windows ® http://libusb-win32.sourceforge.net/