The AT90USBKey provides the following features:

• AT90USB QFN64

• AVR Studio® software interface (1)

• USB software interface for Device Firmware Upgrade (DFU bootloader) (2)

• Power supply flagged by “VCC-ON” LED:

              – regulated 3.3V
              – from an external battery connector
              – from the USB interface (USB device bus powered application)

• JTAG interface (connector not mounted):

                 – for on-chip ISP
                 – for on-chip debugging using JTAG ICE

• Serial interfaces:

                 – 1 USB full/low speed device/host/OTG interface

• On-board resources:

                – 4+1-ways joystick
                – 2 Bi-Color LEDs
                – temperature sensor
                – serial dataflash memories
                – all microcontroller I/O ports access on 2x8pin headers (not mounted)

• On-board RESET button

• On-board HWB button to force bootloader section execution at reset.

• System clock:

              – 8 MHz crystal

Notes: 1. The AVRUSBKey is supported by AVR Studio®, version 4.12 or higher. For up-to date information on this and other AVR tool products, please consult our web site. The most recent version of AVR Studio®, AVR tools and this User Guide can be found in the AVR section of the Atmel web site, http://www.atmel.com.
2. ATMEL Flip®, In System Programming Version 3 or Higher shall be used for Device  Firmware Upgrade. Please consult Atmel web site to retrieve the latex version of Flip and the DFU bootloader Hex file if needed.

User Manual

AT90USBKey2