Microchip ATMEGA32U2-AU, 8 bit AVR, ATMEGA32U2 Microcontroller, 16 MHz, 32kB FLASH, 32-Pin TQFP

The Microchip ATmega32U2 CMOS 8-bit microcontroller based on the AVR enhanced RISC architecture. It operates on 2.7V to 5.5V voltage range. The AVR core combines a rich instruction set with 32 general purpose working registers. It features 32Kbytes of In-System Programmable Flash with Read-While-Write capabilities, 1024 bytes EEPROM, 1024 bytes SRAM 22 general purpose I/O lines, 32 general purpose working registers, two flexible Timer/Counters with compare modes and PWM, one USART, a programmable Watchdog Timer with Internal Oscillator, an SPI serial port, debugWIRE interface, also used for accessing the On-chip Debug system and programming and five 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.

• Up to 16 MIPS Throughput at 16 MHz
• In-System Programming by on-chip Boot Program hardware-activated after reset
• Programming lock for software security
• USB 2.0 Full-speed device module with interrupt on transfer completion
• Microcontroller reset on USB Bus Reset without detach
• USB Bus Disconnection on Microcontroller Request
• One 8-bit Timer/Counters with Separate Prescaler and Compare Mode (two 8-bit PWM channels)
• One 16-bit Timer/Counter with Separate Prescaler, Compare and Capture Mode (three 8-bit PWM channels)
• Master/Slave SPI Serial Interface
• Programmable watchdog timer with separate on-chip oscillator
• On-chip analog comparator
• Interrupt and wake-up on pin change
• Power-On Reset and programmable brown-out detection
• Internal calibrated oscillator
• External and internal Interrupt sources
• QFN32 (5x5mm) / TQFP32 package