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What is the raspberry pi pico maximum SPI frequency? I wwould like to know the theoretical maximum given no overclocking and the maximum that is stable,

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  • well, theoretical and stable max are of course not the same. It also depends on the device, eg ADC max sps might range from 20k to much higher than pico can handle.
    – tlfong01
    Oct 20 '21 at 0:55
  • Considering that each chip will behave differently when overclocked, there is no single answer to this. Oct 20 '21 at 6:35
  • Unanswerable question.
    – joan
    Oct 20 '21 at 8:42
  • datasheets.raspberrypi.org/rp2040/rp2040-datasheet.pdf Look under §4.4.3.4.
    – prash
    Oct 23 '21 at 6:38
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Theoretical value, via Prash's comment, on page 526 of the RP2040 datasheet:

4.4.3.4. Clock ratios

… at the maximum SSPCLK (clk_peri) frequency on RP2040 of 133 MHz, the maximum peak bit rate in [controller] mode is 62.5 Mbps

(emphasis/redaction mine)

Practical value? Unanswerable without knowing the electrical characteristics of your setup. Breadboards and jumper wires get noisy above a few MHz. The governing factor is mostly the speed of your SPI peripheral, too.

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