ATmega32U2 Atmel Corporation, ATmega32U2 Datasheet - Page 303

• Manufacturer Part Number: ATmega32U2
• Manufacturer: Atmel Corporation

Specifications of ATmega32U2

• Flash (kbytes): 32 Kbytes
• Pin Count: 32
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 12
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 22
• Ext Interrupts: 20
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 2
• Uart: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 1
• Eeprom (bytes): 1024
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 2
• Output Compare Channels: 5
• Input Capture Channels: 1
• Pwm Channels: 4
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

ii
ATmega8U2/16U2/32U2
9
10 System Control and Reset .................................................................... 47
11 Interrupts ................................................................................................ 64
12 I/O-Ports .................................................................................................. 67
13 External Interrupts ................................................................................. 84
14 Timer/Counter0 and Timer/Counter1 Prescalers ................................ 88
Power Management and Sleep Modes ................................................. 42
8.8Clock Output Buffer .................................................................................................35
8.9System Clock Prescaler ..........................................................................................35
8.10PLL ........................................................................................................................36
8.11Register Description ..............................................................................................37
9.1Overview .................................................................................................................42
9.2Sleep Modes ...........................................................................................................42
9.3Idle Mode .................................................................................................................42
9.4Power-down Mode ..................................................................................................43
9.5Power-save Mode ...................................................................................................43
9.6Standby Mode .........................................................................................................43
9.7Extended Standby Mode .........................................................................................43
9.8Power Reduction Register .......................................................................................43
9.9Minimizing Power Consumption ..............................................................................44
9.10Register Description ..............................................................................................45
10.1Resetting the AVR .................................................................................................47
10.2Reset Sources .......................................................................................................47
10.3Internal Voltage Reference ....................................................................................51
10.4Watchdog Timer ....................................................................................................51
10.5Register Description ..............................................................................................55
11.1Overview ...............................................................................................................64
11.2Interrupt Vectors in ATmega8U2/16U2/32U2 ........................................................64
11.3Register Description ..............................................................................................65
12.1Overview ...............................................................................................................67
12.2Ports as General Digital I/O ...................................................................................68
12.3Alternate Port Functions ........................................................................................72
12.4Register Description for I/O-Ports ..........................................................................82
13.1Overview ...............................................................................................................84
13.2Register Description ..............................................................................................84
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