← All parts
ATmega32U4
ATmega32U4
Microcontroller
The ATmega32U4 is a low-power 8-bit microcontroller with USB functionality, featuring multiple GPIO pins, ADC, PWM, and various communication interfaces.
In stock
Specifications
8- Operating Voltage
- 2.7 - 5.5V
- Supply Current
- Not specified
- Interface
- SPI, UART, USB
- Resolution
- 10-bit ADC
- Range
- Not specified for ADC
- Accuracy
- Not specified
- Temperature Range
- Industrial (-40°C to +85°C)
- Package
- 44-lead TQFP, 10x10mm; 44-lead QFN, 7x7mm
Pinout
19Low source legibility.The original manufacturer datasheet for this part was difficult to read, so this pinout may be incomplete or imperfect. Always confirm against the specific manufacturer’s datasheet before wiring.
| Pin | Name | Functions | Notes |
|---|---|---|---|
| VCC | Digital supply voltage | POWER | |
| GND | Ground | GND | |
| PB0 | SS/PCINT0 | GPIO | SPI Slave Select |
| PE6 | INT.6/AIN0 | GPIOADC | |
| PB1 | SCLK/PIN.7 | SPI | SPI Serial Clock |
| PB2 | PDI/PCINT2/MOSI | SPIGPIO | |
| PB3 | PDO/PCINT3/MISO | SPIGPIO | |
| PB7 | PCINT7/OC0A/OC1C/RTS | PWMGPIO | |
| RESET | Reset input | GPIO | |
| D- | USB Full speed / Low Speed Negative Data Upstream Port | UART | |
| D+ | USB Full speed / Low Speed Positive Data Upstream Port | UART | |
| UGND | USB Pads Ground | GND | |
| UVCC | USB Pads Internal Regulator Input supply voltage | POWER | |
| UCAP | USB Pads Internal Regulator Output supply voltage. Should be connected to an external capacitor (1µF). | GND | |
| VBUS | USB VBUS monitor input | GPIO | |
| XTAL1 | Input to the inverting Oscillator amplifier and input to the internal clock operating circuit. | GNDPOWER | |
| XTAL2 | Output from the inverting Oscillator amplifier. | GNDPOWER | |
| AVCC | AVCC is the supply voltage pin (input) for all the A/D Converter channels. | POWER | |
| AREF | Analog reference pin (input) for the A/D Converter. | GNDPOWER |
Interactive pinout
Highlight:
ATmega32U4
Click a pin to copy its name · tap a tag above to spotlight a bus.