App note: AVR32 UC3 USB host mass storage bootloader

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USB host mass storage bootloader (PDF!) app note from Atmel:

Features

• In-System Programming (ISP) and Field Upgrade
– Configurable Start Condition with an Upgrade Firmware File ‘avr32fwupgrade.uc3’
Located on a USB Device Implementing the USB Mass Storage Class
• USB Protocol
– Based on the USB Host Mass Storage Class (MSC)
• USB MSC bootloader is additional to the pre-programmed USB Device Firmware
Upgrade (DFU) bootloader
• No computer required

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