4 2013-02-13 www.fritzing.org Atmel 44-pin 8-bit Microcontroller with 32KBytes of ISP Flash and USB Controller ATMEGA32U4 QFN2 QFN-44-NOPAD ATMEGA32U4 qfn Microcontroller false atmega32 qfn44 (nopad) !RESET

AREF

AVCC

AVCC

D+

D-

GND

GND

GND

GND

PB0(SS)

PB1(SCK)

PB2(MOSI)

PB3(MISO)

PB4(ADC11)

PB5(ADC12)

PB6(ADC13)

PB7

PC6

PC7

PD0(SCL)

PD1(SDA)

PD2(RX)

PD3(TX)

PD4(ADC8)

PD5

PD6(ADC9)

PD7(ADC10)

PE2_!HWB

PE6

PF0(ADC0)

PF1(ADC1)

PF4(ADC4)

PF5(ADC5)

PF6(ADC6)

PF7(ADC7)

UCAP

UGND

UVCC

VBUS

VCC

VCC

XTAL1

XTAL2