Re: RP2040 zero

Andy Burns <usenet@andyburns.uk> wrote:

the BusPirate folks had issues with their BP5XL boards and needed to
junk a batch, I see that redesigned as the BP6 it's now on sale ...

Yes, that's the kind of application where it's a problem.  You attach GPIOs
to random stuff and intend to probe what's there.  That means you flip
through the internal settings for input/output/pullup/pulldown and listen
out to how the input changes.

The leakage affects that kind of application badly (input pins should be
high impedance but they aren't here) but if you are putting the chip in a
board where you already know what's on the other end of the pin, you can
design the circuit appropriately.

RPis are more likely to be used in situations where you take the MCU and
plug in and out random things onto the pins which are affected by it,
compared with other MCUs where they only ever get put on vendor PCBs where
everything is predetermined in the schematic.  So it's really a hobbyist
focused problem rather than a wider problem.

Theo