* USB Protocol
  – Based on the USB DFU class
  – Autobaud (8/16 MHz crystal)
* In-System Programming
  – Read/Write Fla.

The 8bits mega AVR with USB interface devices are factory configured with a USB bootloader located in the on-chip flash boot section of the controller. This USB bootloader allows to perform In-System Programming from an USB host controller without re.

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