Features :

• Advanced RISC Architecture.
• 32 x 8 General Purpose Working Registers.
• Fully Static Operation.
• Up to 16 MIPS Throughput at 16 MHz.
• Advanced RISC Architecture.
• On-chip 2-cycle Multiplier.
• High Endurance Non-volatile Memory segments.
• 16 Kbytes of In-System Self-programmable Flash program memory.
• 512 Bytes EEPROM.
• 1 Kbyte Internal SRAM.
• Write/Erase Cycles: 10,000 Flash/100,000 EEPROM.
• Optional Boot Code Section with Independent Lock Bits.
• In-System Programming by On-chip Boot Program.
• True Read-While-Write Operation.
• Programming Lock for Software Security.
• JTAG (IEEE std. 1149.1 Compliant) Interface.
• Boundary-scan Capabilities According to the JTAG Standard.
• Extensive On-chip Debug Support.
• Programming of Flash, EEPROM, Fuses, and Lock Bits through the JTAG Interface.
• Peripheral Features.
• Two 8-bit Timer/Counters with Separate Prescalers and Compare Modes.
• One 16-bit Timer/Counter with Separate Prescaler, Compare Mode, and Capture Mode.
• Real Time Counter with Separate Oscillator.
• Four PWM Channels.
• 8-channel, 10-bit ADC.
• 8 Single-ended Channels.
• 7 Differential Channels in TQFP Package Only.
• 2 Differential Channels with Programmable Gain at 1x, 10x, or 200x.
• Byte-oriented Two-wire Serial Interface.
• Programmable Serial USART.
• Master/Slave SPI Serial Interface.
• Programmable Watchdog Timer with Separate On-chip Oscillator.

Specifications:

1. 131 powerful instructions – Most Single Clock Cycle Execution
2. 32 x 8 general-purpose working registers
3. Fully static operation
4. Up to 20MIPS throughput at 20MHz
5. On-chip 2-cycle multiplier
6. Write/erase cycles: 10,000 flash/100,000 EEPROM
7. Optional boot code section with independent lock bits
8. In system programming by on-chip boot program
9. True read while write operation
10. Programming lock for software security
11. Two 8-bit timer/counters with separate prescaler and compare mode
12. One 16-bit timer/counter with separate prescaler, compare mode, and capture mode
13. Real-time counter with separate oscillator

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.