I am building a device on breadboard where there are 2 ICs: a microcontroller and some auxillary IC, they should communicate via SPI with a 4 MHz clock. Because I don't have enough place on my breadboard, I plan using two breadboards, microcontroller on one and other IC on other. The question is, can I transmit 4MHz 3V3 signal over a jumpre wire, just like on the photo:
Will the signal be deteriorated? Where I can find some rule-of-thumb info about cables and their band-pass frequencies?