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AI Interactive Datasheet ATmega16U4

AVR · megaAVR

ATmega16U4 pinout

Every pin of the ATmega16U4 in its 2 packages, with all its functions. Select a pin to see what it does.

ATMEGA16U4QFN-44TOP VIEW

1

PE6

Pin 1 · QFN-44

PE6General-purpose I/O
AIN0Analog comparator input
INT6External or pin-change interrupt

QFN-44 pin table

Pin	Pad	Functions
1	PE6	PE6AIN0INT6
2	UVCC	Supply or reference
3	DM	No function listed
4	DP	No function listed
5	UGND	No function listed
6	UCAP	Supply or reference
7	VBUS	Supply or reference
8	PB0	PB0PCINT0SS
9	PB1	PB1PCINT1SCK
10	PB2	PB2MOSIPCINT2PDI
11	PB3	PB3MISOPCINT3PDO
12	PB7	PB7OC0AOC1CPCINT7RTS1
13	RESET	Reset
14	VCC	Supply or reference
15	GND	Ground
16	XTAL2	Crystal or clock
17	XTAL1	Crystal or clock
18	PD0	PD0INT0OC0BSCL
19	PD1	PD1INT1SDA
20	PD2	PD2INT2RXD1
21	PD3	PD3INT3TXD1
22	PD5	PD5CTS1XCK1
23	GND	Ground
24	AVCC	Supply or reference
25	PD4	PD4ADC8ICP1
26	PD6	PD6ADC9T1~OC4D
27	PD7	PD7ADC10OC4DT0
28	PB4	PB4ADC11PCINT4
29	PB5	PB5ADC12OC1APCINT5~OC4B
30	PB6	PB6ADC13OC1BOC4BPCINT6
31	PC6	PC6OC3A~OC4A
32	PC7	PC7CLKOICP3OC4A
33	PE2	PE2HWB
34	VCC	Supply or reference
35	GND	Ground
36	PF7	PF7ADC7TDI
37	PF6	PF6ADC6TDO
38	PF5	PF5ADC5TMS
39	PF4	PF4ADC4TCK
40	PF1	PF1ADC1
41	PF0	PF0ADC0
42	AREF	Supply or reference
43	GND	Ground
44	AVCC	Supply or reference