What is the maximum data transfer speed using SPI interface on Arduino?

Question

I have an Arduino Nano and I want to transfer data between it and a Raspberry Pico. I use SPI interface, and I want to know, what is the data speed limit (in bit per second).

score 1 · Accepted Answer · answered Nov 24 '22 at 22:38

1

If you take a look into the Atmega328p datasheet, then there is:

F_OSC/2 in Master mode (with double speed SPI bit set), otherwise F_OSC/4
As a slave at best F_OSC/4

answered Nov 24 '22 at 22:38

KIIV

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So, when FOSC of Arduino is 16 MHz, than it's 4 MHz, it is in bit per second 4 Mbit per sec, is it? – Nohab Nov 25 '22 at 06:51
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Yes, but you'll probably reach software bottleneck at this speed. – KIIV Nov 25 '22 at 14:00

What is the maximum data transfer speed using SPI interface on Arduino?

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