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AT90USB64x Datasheet USB DFU Bootloader

Manufacturer: Atmel (now Microchip Technology)

Download the AT90USB64x datasheet PDF. This datasheet also includes the AT90USB128X variant, as both parts are published together in a single manufacturer document.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (AT90USB128X_ATMEL.pdf) that lists specifications for multiple related part numbers.

General Description

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 removing the part from the system or without a pre-programmed application, and without any external programming interface.

This document describes the USB bootloader functionalities as well as the serial protocol to efficiently perform operations on the on chip Flash memories (Flash and EEPROM).

Overview

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Key Features

  • USB Protocol.
  • Based on the USB DFU class.
  • Autobaud (8/16 MHz crystal).
  • In-System Programming.
  • Read/Write Flash and EEPROM on-chip memories.
  • Read Device ID.
  • Full chip Erase.
  • Start.

More Datasheets from Atmel (now Microchip Technology)

Part Number Description
AT90USB646 Microcontroller
AT90USB647 Microcontroller
AT90USB1286 Microcontroller
AT90USB1287 Microcontroller
AT90USB128X USB DFU Bootloader
AT90USB162 8-bit Microcontroller
AT90USB82 8-bit Microcontroller
AT90LS4434 8-bit Microcontroller
AT90LS8535 8-bit Microcontroller
AT90PWM161 8-bit Microcontroller