@ Skip,
Well I couldnt resolve the 2 different labels so I "connected" them myself to try to make it make sense...lol
IIRC Eagle will complain if you have unconnected lines/labels.
I *think* it will allow cross-connected labels but will issue an "Are you sure?" warning. It's been several years (a couple 'o three computers/HDDs ago) since I messed with it.
I am familiar with the effort hence my "Labor of Love" comment.
I always got a kick out of watching it do the PCB/Vias layout variants ...smart lil bugger...lol
Yeah, I dont see any easy way to do any muxing with the Pico not knowing when to latch the requested address. If you slowed it down *some amount* and did something like "n samples = the same values then latch that addr value" but that would be some ugly/quirky code. Plus, it would still have to be faster than the read window so the 244's could swap and settle...just to save one lousy pin?..naaa
I agree, use a GPIO to generate an IRQ, then let the state machine do it's thing is a much simpler method.