Overview

The ATmega32U6/AT90USB64/128 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 ATmega32U6/AT90USB64/128 achieves throughputs approaching 1 MIPS per MHz allowing the system designer to optimize power consumption versus processing speed.

Features

• High Performance, Low Power AVR® 8-Bit Microcontroller

• Advanced RISC Architecture

– 135 Powerful Instructions – Most Single Clock Cycle Execution

– 32 x 8 General Purpose Working Registers

– Fully Static Operation

– Up to 16 MIPS Throughput at 16 MHz

– On-Chip 2-cycle Multiplier

• Non-volatile Program and Data Memories

– 32/64/128K Bytes of In-System Self-Programmable Flash

• Endurance: 100,000 Write/Erase Cycles

– Optional Boot Code Section with Independent Lock Bits

• USB Bootloader programmed by default in the Factory

• In-System Programming by On-chip Boot Program hardware activated after reset

• True Read-While-Write Operation

• All supplied parts are preprogramed with a default USB bootloader

– 1K/2K/4K (32K/64K/128K Flash version) Bytes EEPROM

• Endurance: 100,000 Write/Erase Cycles

– 2.5K/4K/8K (32K/64K/128K Flash version) Bytes Internal SRAM

– Up to 64K Bytes Optional External Memory Space

– 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

• USB 2.0 Full-speed/Low-speed Device and On-The-Go Module

– Complies fully with:

– Universal Serial Bus Specification REV 2.0

– On-The-Go Supplement to the USB 2.0 Specification Rev 1.0

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

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

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

– 6 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 independant 832 bytes USB DPRAM for endpoint memory allocation

– Suspend/Resume Interrupts

– Power-on Reset and USB Bus Reset

– 48 MHz PLL for Full-speed Bus Operation

– USB Bus Disconnection on Microcontroller Request

• USB OTG Reduced Host :

– Supports Host Negotiation Protocol (HNP) and Session Request Protocol (SRP) for OTG dual-role devices

– Provide Status and control signals for software implementation of HNP and SRP

– Provides programmable times required for HNP and SRP

• Peripheral Features

– Two 8-bit Timer/Counters with Separate Prescaler and Compare Mode

– Two16-bit Timer/Counter with Separate Prescaler, Compare- and Capture Mode

– Real Time Counter with Separate Oscillator

– Four 8-bit PWM Channels

– Six PWM Channels with Programmable Resolution from 2 to 16 Bits

– Output Compare Modulator

– 8-channels, 10-bit ADC

– Programmable Serial USART

– Master/Slave SPI Serial Interface

– Byte Oriented 2-wire Serial Interface

– Programmable Watchdog Timer with Separate On-chip Oscillator

– On-chip Analog Comparator

– Interrupt and Wake-up on Pin Change

• Special Microcontroller Features

– Power-on Reset and Programmable Brown-out Detection

– Internal Calibrated Oscillator

– External and Internal Interrupt Sources

– Six Sleep Modes: Idle, ADC Noise Reduction, Power-save, Power-down, Standby, and Extended Standby

• I/O and Packages

– 48 Programmable I/O Lines

– 64-lead TQFP and 64-lead QFN

• Operating Voltages

– 2.7 - 5.5V

• Operating temperature

– Industrial (-40°C to +85°C)

• Maximum Frequency

– 8 MHz at 2.7V - Industrial range

– 16 MHz at 4.5V - Industrial range