ATmega32U4 Microcontroller

Atmega32U4 is the Micro-controller that is used in Arduino Leonardo and Arduino Pro. 

This low-power Microchip 8-bit AVR RISC-based micro-controller featuring 32KB self-programming flash program memory, 2.5KB SRAM, 1KB EEPROM, USB 2.0 full-speed/low speed device, 12-channel 10-bit A/D-converter, and JTAG interface for on-chip-debug. The device achieves up to 16 MIPS throughput at 16 MHz. 2.7 - 5.5 Volt operation.

By executing powerful instructions in a single clock cycle, the device achieves throughputs approaching 1 MIPS per MHz, allowing you to optimize power consumption versus processing speed.

Features of ATmega32U4

• USB 2.0 Full-speed/Low Speed Device Module with Interrupt on Transfer Completion

• Complies fully with Universal Serial Bus Specification Rev 2.0

• Supports data transfer rates up to 12Mbit/s and 1.5Mbit/s

• Endpoint 0 for Control Transfers: up to 64-bytes

• Six Programmable Endpoints with IN or Out Directions and with Bulk, Interrupt or Isochronous Transfers

• Configurable Endpoints size up to 256 bytes in double bank mode

• Fully independent 832 bytes USB DPRAM for endpoint memory allocation

• Suspend/Resume Interrupts

• CPU Reset possible on USB Bus Reset detection

• 48MHz from PLL for Full-speed Bus Operation

• USB Bus Connection/Disconnection on Microcontroller Request

• Crystal-less operation for Low Speed mode

• Program Memory Type: Flash

• Program Memory (KB): 32

• CPU Speed (MIPS): 16

• RAM Bytes: 2,560

• Data EEPROM (bytes): 1024

• Digital Communication Peripherals: 1-UART, 2-SPI, 1-I2C

• Capture/Compare/PWM Peripherals: 2 Input Capture, 2 CCP, 12PWM

• Timers: 2 x 8-bit, 2 x 16-bit

• Comparators: 1

• USB (ch, speed, compliance): 1, None

• Temperature Range (C): -40 to 85

• Operating Voltage Range (V): 2.7 to 5.5

• Pin Count: 44

• Cap Touch Channels: 14