MT-DB-U4
User Guide
Next, click on the USB cable icon (second from left), select USB, then connect. The screen
should now show information about the ATmega32U4.
** NOTE: If you get a "AtLibUsbDfu.dll not found message" error message from Flip when you click on
the USB icon, the problem is a a wrong/missing board driver.
Close Flip.
Disconnect/reconnect/reset board as needed to get Windows to reload the driver.
Point the driver install wizard to the "..\Program Files\Atmel\Flip 3.4.7\usb\" folder.
Once the driver is installed, go back to step 1.
Click on the File menu, and open the appropriate hex file. More information will appear about the
program. All four check boxes should be checked. Be sure that erase is checked. The firmware cannot
be loaded unless the flash is erased first. Now click on the Run button in the lowerleft of the screen,
and the firmware will be quickly loaded onto the ATmega32U4. If verification is successful, “Verify
PASS” will appear in the status message area (bottom left).
December 30, 2015
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