Post AkrViC1T3odEjk0kGe by bread80@mstdn.social
 (DIR) More posts by bread80@mstdn.social
 (DIR) Post #AkljSu4tjGeb9GSYDI by bread80@mstdn.social
       2024-08-08T20:47:30Z
       
       0 likes, 0 repeats
       
       Checking the back of the #RP2350 #Pico-2 datasheet: THE GPIOS ARE 5V TOLERANT !!!#HappyDance #FistPumpImage 1: Specs for 'FT' (fault tolerant) pins.Image 2: Pin type definitions.Image 3: Listing of GPIO pins (not all shown 'cos there's far too many).(PS The rating for the Analogue/Digital pins which can be routed to ADCs is unclear, but I'm expecting they have the same ratings).
       
 (DIR) Post #AkljSv6hu1hALAJVfk by bread80@mstdn.social
       2024-08-08T20:52:05Z
       
       0 likes, 1 repeats
       
       Imagine what the retro community can achieve with 48 pins which are all 5 volt tolerant. This thing should be able to emulate pretty much anything in a 40-pin package. #GameChanger #RP2350 (But outputs are still a maximum of 3.3V, so may need level conversion for full compatibility).
       
 (DIR) Post #AkljSzZDJysIAjgKf2 by bread80@mstdn.social
       2024-08-08T20:55:07Z
       
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       Also of note in the #RP2350 (#Pico-2): There's now a way to use interrupts to communicate between PIOs. This will help solve situations where you need SMs to talk to each other but you have too many to fit into a single PIO.
       
 (DIR) Post #Akll3LDmO93Pi8YJrk by thelastpsion@bitbang.social
       2024-08-08T21:18:01Z
       
       0 likes, 1 repeats
       
       @bread80 Yeah, the PsiDrive will still need level shifting for ASIC5 (5v CMOS) based SSDs. But ASIC4 (5v TTL) based SSDs could be wired straight in with no level shifting, which is really handy to know. It might even mean that an RP2350 based SSD (still currently vapourware) wouldn't need any level shifting, as long as SIBO ASICs were 5v TTL. I'm guessing ASIC9 machines (3a onwards) are TTL and the older ASIC2 ones are CMOS, but I don't know that for certain.
       
 (DIR) Post #AklnxIraXfBwWTz9Oa by bread80@mstdn.social
       2024-08-08T21:50:34Z
       
       0 likes, 0 repeats
       
       @thelastpsion Another option would be to use 5V pull ups.
       
 (DIR) Post #AkrTaNh1aScUhrb1qS by thelastpsion@bitbang.social
       2024-08-11T15:30:36Z
       
       0 likes, 0 repeats
       
       @bread80 If I did that, what would happen if a tri-stated a pin? Would it pull up to 5V?
       
 (DIR) Post #AkrViC1T3odEjk0kGe by bread80@mstdn.social
       2024-08-11T15:54:24Z
       
       0 likes, 0 repeats
       
       @thelastpsion Yes.