ATMEGA32U4-AU Atmel, ATMEGA32U4-AU Datasheet - Page 426

• Manufacturer Part Number: ATMEGA32U4-AU
• Description: MCU AVR 32K FLASH 16MHZ 44-TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA32U4-AU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: I²C, SPI, UART/USART, USB
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 26
• Program Memory Size: 32KB (16K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 1K x 8
• Ram Size: 2.5K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-TQFP, 44-VQFP
• Processor Series: ATMEGA32x
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 2.5 KB
• Interface Type: SPI/TWI/USART
• Maximum Clock Frequency: 16 MHz
• Number Of Programmable I/os: 26
• Number Of Timers: 5
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWAVR, EWAVR-BL
• Development Tools By Supplier: ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 12-ch x 10-bit
• Cpu Family: ATmega
• Device Core: AVR
• Device Core Size: 8b
• Frequency (max): 16MHz
• Total Internal Ram Size: 2.5KB
• # I/os (max): 26
• Number Of Timers - General Purpose: 5
• Operating Supply Voltage (typ): 3.3/5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 2.7V
• Instruction Set Architecture: RISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 44
• Package Type: TQFP
• Controller Family/series: AVR MEGA
• No. Of I/o's: 26
• Eeprom Memory Size: 1KB
• Ram Memory Size: 2.5KB
• Cpu Speed: 16MHz
• Rohs Compliant: Yes
• For Use With: ATSTK524 - KIT STARTER ATMEGA32M1/MEGA32C1ATSTK600 - DEV KIT FOR AVR/AVR32ATAVRDRAGON - KIT DRAGON 32KB FLASH MEM AVRATSTK500 - PROGRAMMER AVR STARTER KIT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: ATMEGA32U4-16AU; ATMEGA32U4-16AU

ii
ATmega16/32U4
7
8
9
10 I/O-Ports .................................................................................................. 65
11 External Interrupts ................................................................................. 85
12 Timer/Counter0, Timer/Counter1, and Timer/Counter3 Prescalers ... 89
13 8-bit Timer/Counter0 with PWM ............................................................ 91
Power Management and Sleep Modes ................................................. 43
System Control and Reset .................................................................... 49
Interrupts ................................................................................................ 61
6.10PLL ........................................................................................................................39
7.1Idle Mode .................................................................................................................44
7.2ADC Noise Reduction Mode ...................................................................................44
7.3Power-down Mode ..................................................................................................44
7.4Power-save Mode ...................................................................................................44
7.5Standby Mode .........................................................................................................45
7.6Extended Standby Mode .........................................................................................45
7.7Power Reduction Register .......................................................................................45
7.8Minimizing Power Consumption ..............................................................................47
8.1Internal Voltage Reference ......................................................................................54
8.2Watchdog Timer ......................................................................................................55
9.1Interrupt Vectors in ATmega16U4/ATmega32U4 ....................................................61
10.1Introduction ............................................................................................................65
10.2Ports as General Digital I/O ...................................................................................66
10.3Alternate Port Functions ........................................................................................70
10.4Register Description for I/O-Ports ..........................................................................82
12.1Internal Clock Source ............................................................................................89
12.2Prescaler Reset .....................................................................................................89
12.3External Clock Source ...........................................................................................89
12.4General Timer/Counter Control Register – GTCCR ..............................................90
13.1Overview ...............................................................................................................91
13.2Timer/Counter Clock Sources ...............................................................................92
13.3Counter Unit ..........................................................................................................92
13.4Output Compare Unit ............................................................................................93
13.5Compare Match Output Unit ..................................................................................95
13.6Modes of Operation ...............................................................................................96
13.7Timer/Counter Timing Diagrams .........................................................................100
7766F–AVR–11/10