Atmel ATmega32U4 (Arduino Leonardo) Breakout Board

HobbyTronics Atmel ATmega32U4 (Arduino Leonardo) Breakout Board
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Modèle : ATMEGA32U4-ARD
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Atmel ATmega32U4 (Arduino Leonardo) Breakout Board

This is the Atmel ATmega32U4 chip used in the Arduino Leonardo boards. Atmel don't make a DIL version of this chip, so we have soldered it onto one of our 44 pin TQFP to DIL Adapter boards for you so you can experiment with it on a breadboard. We have also installed the Arduino Leonardo bootloader so it's ready to program with the Arduino IDE over a USB connection (see below for wiring link).

Atmega32U4 Arduino Pinout

The ATmega32U4 is a low-power CMOS 8-bit microcontroller based on the AVR enhanced RISC architecture. By executing powerful instructions in a single clock cycle, the ATmega32U4 achieves throughputs approaching 1 MIPS per MHz allowing the system designer to optimize power consumption versus processing speed.

The ATmega32U4 provides the following features:

  • 32K bytes of In-System Programmable Flash with Read-While-Write capabilities
  • 1K bytes EEPROM
  • 2.5K bytes SRAM
  • 26 general purpose I/O lines (CMOS outputs and LVTTL inputs)
  • 32 general purpose working registers
  • four flexible Timer/Counters with compare modes and PWM
  • one more high-speed Timer/Counter with compare modes and PLL adjustable source
  • one USART (including CTS/RTS flow control signals)
  • a byte oriented 2-wire Serial Interface
  • a 12-channel 10-bit ADC with optional differential input stage with programmable gain
  • an on-chip calibrated temperature sensor
  • a programmable Watchdog Timer with Internal Oscillator
  • an SPI serial port
  • IEEE std. 1149.1 comp liant JTAG test interface, also used for accessing the On-chip Debug system and programming and six software selectable power saving modes.
  • The Idle mode stops the CPU while allowing the SRAM, Timer/Counters, SPI port, and interrupt system to continue functioning.
  • The Power-down mode saves the register contents but freezes the Oscillator, disabling all other chip functions until the next interrupt or Hardware Reset.
  • The ADC Noise Reduction mode stops the CPU and all I/O modules except ADC, to minimize switching noise during ADC conversions.
  • In Standby mode, the Crystal/Resonator Oscillator is running while the rest of the device is sleeping. This allows very fast start-up combined with low power consumption.


ATmega32U4 Datasheet
Breadboard Wiring diagram for programming via USB
   - Note, the Arduino Bootloader is already installed


Atmel ATmega32U4 44-pin TQFP
Atmel ATmega32U4 44-pin TQFP
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Arduino Leonardo without Headers
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Atmel ATmega32U4 (Arduino Leonardo) Breakout Board
Cliquer pour agrandir
Atmel ATmega32U4 (Arduino Leonardo) Breakout Board
Cliquer pour agrandir
Atmel ATmega32U4 (Arduino Leonardo) Breakout Board
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