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!

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Nano Every

Product ID: 256144295

Details

Brand
Arduino
CPU model
Cortex
Installed RAM memory size
6 KB
Memory storage capacity
48 KB
Model name
ARD_A000005

⚡Powerful 20MHz ATMega4809 CPU

📏Compact 48x18mm footprint

🔋High-efficiency DC-DC power up to 21V

MOP$535

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Sold byAmazon MacauDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚙️ Tiny board, massive potential — build smarter, faster, better!

MEMORY TO SPARE - 48KB Flash and 6KB SRAM let you run bigger, bolder sketches without compromise.
ROBUST 20 M HZ CPU - ATMega4809 processor delivers smooth, efficient performance for complex projects.
NANO SIZED POWERHOUSE - Fits classic Arduino Nano form factor for seamless integration.
PLUG PLAY PROTOTYPING - Compatible with Arduino IDE and thousands of open-source sketches to jumpstart your creativity.
POWER UP WITHOUT LIMITS - High-efficiency DC-DC converter supports up to 21V input and 950mA output without overheating.

The Arduino Nano Every is a compact yet powerful microcontroller board featuring a 20MHz ATMega4809 CPU, 48KB Flash memory, and 6KB SRAM. Its classic Nano footprint ensures compatibility with existing shields, while a high-efficiency DC-DC converter enables stable power delivery up to 21V and 950mA output. Perfect for professionals and makers seeking a versatile, reliable platform for rapid prototyping and advanced DIY electronics.

Specifications

ASIN	B07VX7MX27
Best Sellers Rank	#12,542 in Computers ( See Top 100 in Computers ) #61 in Motherboards
Brand	Arduino
Built-In Media	1 x Board
CPU Model	Cortex
Compatible Devices	Arduino Boards and Shields
Connectivity Technology	USB
Customer Reviews	4.7 4.7 out of 5 stars (1,378)
External Testing Certification	Não aplicável
Item Dimensions L x W x H	45L x 18W x 10H millimeters
Item Weight	0.01 Kilograms
Manufacturer	Arduino
Memory Storage Capacity	48 KB
Mfr Part Number	ABX00028
Model Name	ARD_A000005
Model Number	ABX00028_SML
Number of Items	1
Number of Packs	1
Operating System	DOS
Processor Brand	Microchip Technology
Processor Count	1
Processor Speed	48 MHz
RAM Memory Installed	6 KB
RAM Memory Technology	SRAM
Total Usb Ports	1
Unit Count	1 Count
Wireless Compability	802.11b

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