Atmega32U4 Breakout

AdafruitATmega32u4

A USB-native 8-bit AVR microcontroller with built-in USB core, used for various USB device applications.

In stock

Specifications

Operating Voltage: 5V (USB) or 3.3V (external) at 16MHz clock speed.
Logic Level: TTL compatible
Clock Speed: 16 MHz
Flash: 32K bytes
Ram: 2.5K bytes
Gpio Count: 36
Dimensions: 0.79 x 1.48 inches (20.1 x 37.6 mm)

Pinout

Low 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
0	RESET	GPIO	Used to reset the board
1	RXD	UART	Receive data
2	TXD	UART	Transmit data
3	INT0	GPIO	External interrupt request 0
4	SS	SPI	Slave Select for SPI
5	MOSI	SPI	Master Out Slave In for SPI
6	SCK	SPI	Serial Clock for SPI
7	D0	GPIO	Digital I/O
8	D1	GPIO	Digital I/O
9	D2	GPIO	Digital I/O
10	D3	GPIO	Digital I/O
11	D4	GPIO	Digital I/O
12	D5	GPIO	Digital I/O
13	D6	GPIO	Digital I/O
14	D7	GPIO	Digital I/O
15	D8	GPIO	Digital I/O
16	D9	GPIO	Digital I/O
17	D10	GPIO	Digital I/O
18	D11	GPIO	Digital I/O
19	D12	GPIO	Digital I/O
20	D13	PWM	PWM capable, used for blinking LED
21	D14	GPIO	Digital I/O
22	D15	GPIO	Digital I/O
23	D16	GPIO	Digital I/O
24	D17	GPIO	Digital I/O
25	D18	GPIO	Digital I/O
26	D19	GPIO	Digital I/O
27	D20	GPIO	Digital I/O
28	D21	GPIO	Digital I/O
29	D22	GPIO	Digital I/O
30	D23	GPIO	Digital I/O
31	D24	GPIO	Digital I/O
32	D25	GPIO	Digital I/O
33	D26	GPIO	Digital I/O
34	D27	GPIO	Digital I/O
35	D28	GPIO	Digital I/O
36	D29	GPIO	Digital I/O
37	D30	GPIO	Digital I/O
38	D31	GPIO	Digital I/O
39	GND	GND	Ground pin
40	VCC	POWER	5V power supply

Interactive pinout

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ATmega32u4

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