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ATmega32U4
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32-Kbytes of In-System Programmable Flash, 1-Kbyte EEPROM, 2.5-Kbytes SRAM, USB 2.0 Full-speed/Low Speed Device Module. High-speed PWMs, 12-channel 10-bit ADC. JTAG test interface. Up to 16 MIPS Throughput at 16 MHz. 2.7 - 5.5 Volt operation.
Flash (Kbytes) 32
EEPROM (Kbytes) 1
SRAM (Bytes) 2.5K
Max I/O Pins 26
   TQFP 44
 VQFN (Sawn) 44
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ATmega16U4 ATmega32U4 Preliminary Summary (22 pages, revision D, updated 1/09)
ATmega16U4 ATmega32U4 Preliminary (408 pages, revision D, updated 1/09)
USB DFU Bootloader Datasheet (28 pages, revision C, updated 07/08)
 
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AVR146: Lithium-Ion Battery Charging via USB with ATmega16/32U4 (35 pages, revision A, updated 06/08)
This application note is based on the ATmega16/32U4 and focuses on how to use the EVK527 evaluation kit to charge Lithium-Ion (Li-Ion) batteries using USB connection as power supply.
AVR042: AVR Hardware Design Considerations (14 pages, revision F, updated 4/08)
This Application Note covers the most common problems encountered when switching to a new microcontroller architecture like the AVR. Solutions and considerations for the most common design challenges are covered.
AVR298: USB Audio Demonstration with ATmega32(16)U4 (8 pages, revision A, updated 11/08)
This document describes a simple audio project. It allows to quickly test USB hardware using the ATMega32U4 without any driver installation.
AVR922: Add a Serial Number to your USB Device (6 pages, revision A, updated 1/09)
Adding to the VID (Vendor ID) and the PID (Product ID), the USB device may need a unique serial number. The AVRŽ USB products offer you this feature and you do not need any external data to build this serial number. All you need is to read the unique ID provided in the AVR embedded flash.
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Debug Tool: AVR Dragon
AVR JTAGICE mkII
Design Software: AVR Studio 4
AVR USB Series4 Software Packages
QTouch Library 3.1
QTouch Studio 3.0.0
Evaluation Kit: ATEVK527 USB 4-series High-Speed PWM Evaluatio
In-System Programming: AVR ISP In-System Programmer
Reference Design: ATAVRUSBRF01 USB 2.4 GHz Reference Design
Starter Kit: ATSTK600
ATSTK600-TQFP44
Software Files: ATmega32U4 USB Bootloader
ATmega32U4 USB Software Package
AVR IBIS – AVR USB Software files
Zip archive with IBIS files for Atmel AVR USB devices.
Register to download QTouch Library
 
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AVR Dragon
AVR JTAGICE mkII
See more FAQs
  
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AVR and AVR32 - Quick Reference Guide (Overview, 68 pages, revision I, updated 5/09)
Introduction of the product range of AVR and AVR32 microcontrollers and application processors:
  • Device family description
  • Key features
  • Device selection guides
  • Application oriented device families
  • Tools offer
AVR Instruction Set (User Guide, 155 pages, revision H, updated 7/09)