From: theom+news@chiark.greenend.org.uk   
      
   Andy Burns  wrote:   
   > The Natural Philosopher wrote:   
   >   
   > > I got some of these seriously cheap from Ali Express, They are   
   > > essentially a PI PICO on a much smaller board with fewer  accessible pins.   
   > >   
   > > Has anyone used one?   
   > When the PICO2 came out, I bought a couple of PiMoroni 2350 boards, both   
   > smaller than official PICO2 boards, one with USB-C and fewer pins, one   
   > with full set of pins but no USB port on-board ... life intervened so   
   > done nowt with them ... I remember hearing there's something b0rked with   
   > I/O on the 2350s in general, not sure if it's just edge cases or   
   > generally fucked?   
      
   https://hackaday.com/2024/09/20/raspberry-pi-rp2350-e9-erratum-r   
   defined-as-input-mode-leakage-current/   
      
   basically if you want a pulldown on an input pin there's chunky leakage   
   current.  That can also affect external circuitry that isn't expecting it,   
   eg if you have a resistive divider as the leakage could drag the voltage   
   down.  You can end up with I/Os getting stuck halfway and effectively   
   latching old values.   
      
   That could cause some issues if you're doing a drop in replacement for a   
   RP2040 but if you use stronger external pullup/pulldowns it should avoid the   
   issue.   
      
   It looks like they haven't done a respin to fix it thus far.   
      
   Theo   
      
   --- SoupGate-DOS v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)