ATmega32U4 Atmel Corporation, ATmega32U4 Datasheet - Page 73

• Manufacturer Part Number: ATmega32U4
• Manufacturer: Atmel Corporation

Specifications of ATmega32U4

• Flash (kbytes): 32 Kbytes
• Pin Count: 44
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 14
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 26
• Ext Interrupts: 13
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 2
• Twi (i2c): 1
• Uart: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 12
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 3.3
• 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: 4
• Output Compare Channels: 12
• Input Capture Channels: 2
• Pwm Channels: 8
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

ATmega16/32U4
• OC1B/PCINT6/OC.4B/ADC12, Bit 6
OC1B, Output Compare Match B output: The PB6 pin can serve as an external output for the
Timer/Counter1 Output Compare B. The pin has to be configured as an output (DDB6 set “one”)
to serve this function. The OC1B pin is also the output pin for the PWM mode timer function.
PCINT6, Pin Change Interrupt source 6: The PB7 pin can serve as an external interrupt source.
OC.4B: Timer 4 Output Compare B. This pin can be used to generate a high-speed PWM signal
from Timer 4 module. The pin has to be configured as an output (DDB6 set “one”) to serve this
function.
ADC13: Analog to Digital Converter, channel 13.
• OC1A/PCINT5/OC.4B/ADC12, Bit 5
OC1A, Output Compare Match A output: The PB5 pin can serve as an external output for the
Timer/Counter1 Output Compare A. The pin has to be configured as an output (DDB5 set (one))
to serve this function. The OC1A pin is also the output pin for the PWM mode timer function.
PCINT5, Pin Change Interrupt source 5: The PB7 pin can serve as an external interrupt source.
OC.4B: Timer 4 Output Compare B. This pin can be used to generate a high-speed PWM signal
from Timer 4 module, complementary to OC.4B (PB5) signal. The pin has to be configured as an
output (DDB5 set (one)) to serve this function.
ADC12: Analog to Digital Converter, channel 12.
• PCINT4/ADC11, Bit 4
PCINT4, Pin Change Interrupt source 4: The PB7 pin can serve as an external interrupt source.
ADC11, Analog to Digital Converter channel 11.
• PDO/MISO/PCINT3 – Port B, Bit 3
PDO, SPI Serial Programming Data Output. During Serial Program Downloading, this pin is
used as data output line for the ATmega16U4/ATmega32U4.
MISO: Master Data input, Slave Data output pin for SPI channel. When the SPI is enabled as a
master, this pin is configured as an input regardless of the setting of DDB3. When the SPI is
enabled as a slave, the data direction of this pin is controlled by DDB3. When the pin is forced to
be an input, the pull-up can still be controlled by the PORTB3 bit.
PCINT3, Pin Change Interrupt source 3: The PB7 pin can serve as an external interrupt source.
• PDI/MOSI/PCINT2 – Port B, Bit 2
PDI, SPI Serial Programming Data Input. During Serial Program Downloading, this pin is used
as data input line for the ATmega16U4/ATmega32U4.
MOSI: SPI Master Data output, Slave Data input for SPI channel. When the SPI is enabled as a
slave, this pin is configured as an input regardless of the setting of DDB2. When the SPI is
enabled as a master, the data direction of this pin is controlled by DDB2. When the pin is forced
to be an input, the pull-up can still be controlled by the PORTB2 bit.
PCINT2, Pin Change Interrupt source 2: The PB7 pin can serve as an external interrupt source.
73
7766F–AVR–11/10