Atmel ATmega32U4 (Arduino Leonardo) Breakout Board
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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).
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.
Documents
ATmega32U4 Datasheet
Breadboard Wiring diagram for programming via USB
- Note, the Arduino Bootloader is already installed
![]() Atmel ATmega32U4 44-pin TQFP ATMEGA32U4-IC 6,48€ |
![]() Arduino Leonardo without Headers A000052 21,15€ |
![]() A-Star 32U4 Mini LV - Arduino Leonardo Mini board A-STAR-32U4-MINI 17,99€ |
![]() A-Star 32U4 Micro A-STAR-32U4 11,80€ ![]() |
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