Comment by Lerc
2 days ago
PIO to PIO between two rp2350s should be able to transfer as many bits per clock as you can spare pins for.
They have a single cycle double multiply per core, and the interpolators give you a heap of ability
The PIO can be awkward, but you can run a bunch of them at once. Going from MCU to MCU you don't even need to involve the CPU cores, PIO to PIO Comms via pins
You are obviously not going to get big TOPS from it because a Trillion is a ridiculous amount anyway. But never underestimate the power of controlling the whole pipeline.
Ultimately none of the other things I'm doing with MCUs are practical, why would this to be any different.
Running some quick numbers shows you should be able to get >1Gbps. But I seriously doubt you could get those speeds in reality. You would need to get them perfectly in sync, which would likely take a dedicated board and some great knowledge of the oscillator.
As someone who has done a reasonable amount with PIO, I do not think this is possible. However, that should not stop you. If you get it to work, please ping me.