https://forum.arduino.cc/t/spi-at-24mhz-not-work/655615
SPI at 24Mhz not work. - Zero - Arduino Forum
May 18, 2020 - Hi Changing the line 45 on #define SPI_MIN_CLOCK_DIVIDER (uint8_t)(1 + ((F_CPU - 1) / 24000000)) SPI, really work at 24Mhz. Verified with the oscilloscope. The...
not workspizeroarduinoforum
https://forum.arduino.cc/t/24mhz-high-precision-crystal-clock-oscillator/58255
24Mhz High Precision Crystal Clock Oscillator - 3rd Party Boards - Arduino Forum
Apr 13, 2011 - I was browsing around on eBay and came upon these 24Mhz Clock Crystals and was wondering if it was possible to upgrade the close of my Pro Mini Ardunio. Have...
high precisioncrystal clockboards arduino