Does it really runs at 20mhz as the product description says? when i compile i see -df_cpu=16000000.

By default it runs at 16MHz. You can modify the board.txt file to have it run at 20MHz however it confuses some libraries so only proceed if you have low level programming experience and can fix the problems.

The pinout diagram list some pins with an extra '~', e.g. ~D10. What is special about those pins?

The pins with the ~ mark are PWM pins, capable of Pulse Width Modulation. Useful for brightness or speed control, among other things.

Are the port registers the same between the uno and every? will my existing uno code that uses port registers work without modification on the every?

No, the underlying port and peripheral architecture is completely different. You will have to rework your code, but the benefits are the Nano Every has more memory, is faster, and has more capabilities that the Arduino library doesn't use. Less expensive too!

Arduino Nano Every Without Headers | ATMega4809 20MHz AVR Microcontroller | 48KB Flash, 6KB SRAM | Compact 48x18mm Board | 21V Input DC-DC Power | IoT Robotics Development

Arduino Nano Every Without Headers | ATMega4809 20MHz AVR Microcontroller | 48KB Flash, 6KB SRAM | Compact 48x18mm Board | 21V Input DC-DC Power | IoT Robotics Development

Product ID: 232459475

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Details

Brand
Arduino
CPU Model
Cortex
Memory Storage Capacity
48 KB
Model Name
ARD_A000005
RAM Memory Installed Size
6 KB

⚡20MHz high-speed clock

💾48KB Flash + 6KB SRAM memory

🔋Power up to 21V with 950mA output

Description

🚀 Nano size, mega impact — power your next big idea!

MEMORY BOOST - 48KB Flash and 6KB SRAM to handle complex sketches and multitasking effortlessly.
COMPACT POWERHOUSE - Sleek 48x18mm design fits anywhere, powering your projects without bulk.
ROBUST PERFORMANCE - ATMega4809 AVR processor running at 20MHz for smooth, efficient computing.
HIGH VOLTAGE TOLERANCE - Supports up to 21V input and drives peripherals at 950mA without overheating.
PLUG PLAY INNOVATION - Thousands of open-source sketches ready to launch your creativity instantly.

The Arduino Nano Every is a compact, high-performance microcontroller board featuring an ATMega4809 AVR processor clocked at 20MHz, with 48KB Flash memory and 6KB SRAM. Its advanced power architecture supports up to 21V input and can deliver 950mA to peripherals without overheating, making it ideal for robust, efficient embedded projects. Compatible with a vast open-source ecosystem, it’s the go-to choice for professionals seeking a versatile, space-saving development platform.

Specifications

ASIN	B07VX7MX27
Best Sellers Rank	#283,180 in Electronics ( See Top 100 in Electronics ) #469 in Motherboards
Box Contents	1 x Arduino Nano Every
Brand	Arduino
Brand Name	Arduino
CPU Model	Cortex
CPU Speed	20 MHz
Compatible Devices	Arduino Boards and Shields
Customer Reviews	4.7 out of 5 stars 1,317 Reviews
External Testing Certification	Não aplicável
Importer Contact Information	Robocraze, Ground Floor, 912/10 Survey no. 104 4th G street, Chelekare, Kalyan Nagar, Bengaluru - 560043
Item Dimensions L x W x H	45L x 60W x 10H Millimeters
Item Type Name	Arduino Nano Every
Item Weight Unit of Measure	0.01 Kilograms
Manufacturer	Arduino, Arduino, St. James Avenue, Boston, Massachusetts, 02116, USA
Manufacturer Contact Information	Arduino, St. James Avenue, Boston, Massachusetts, 02116, USA
Manufacturer Part Number	ABX00028
Memory Storage Capacity	48 KB
Model Name	ARD_A000005
Model Number	ABX00028_SML
Network Connectivity Technology	USB
Operating System	DOS
Packer Contact Information	Robocraze, Ground Floor, 912/10 Survey no. 104 4th G street, Chelekare, Kalyan Nagar, Bengaluru - 560043
Processor Brand	ARM
Processor Count	1
Processor Speed	20 MHz
RAM Memory Installed	6 KB
RAM Memory Installed Size	6 KB
RAM Memory Technology	SRAM
Total USB Ports	1
Unit Count	1 Count
Warranty Description	6 months Brand
Wireless Compability	802.11b

Reviews

A**R

Great

19.10.2025

A**A

Funciona perfectamente

Fácil de usar y entrega correcta

6.01.2025

K**M

問題なく使えています

アルデーノとして問題なく使えました。

10.03.2026

Z**E

Supeeerrrrr

Schnelle Lieferung, anständig verpackt, und funktioniert einwandfrei mit Arduino-IDE.

13.03.2026

J**E

Good little boards

20.09.2025

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