My thanks also - this is really useful info to have.
If you are set up to capture this easily, it would be interesting to know the behaviour for Vcc values other than 3.3V. I've been slightly wary of taking advantage of the 5V-tolerant capability as it's hard to guarantee the relative ramp rates of the two supplies. I think that if an add-on board using RP2350 is powered independently from the 5V system it is connected to then it's an unacceptable risk; if the add-on derives its 3V3 from the host system 5V (maybe with an LDO) you would hope that it stays within datasheet, but there's a bit of a question mark over the behaviour while the supplies are ramping - is it also 4V-tolerant when VCC is at 2V for example.
If you are set up to capture this easily, it would be interesting to know the behaviour for Vcc values other than 3.3V. I've been slightly wary of taking advantage of the 5V-tolerant capability as it's hard to guarantee the relative ramp rates of the two supplies. I think that if an add-on board using RP2350 is powered independently from the 5V system it is connected to then it's an unacceptable risk; if the add-on derives its 3V3 from the host system 5V (maybe with an LDO) you would hope that it stays within datasheet, but there's a bit of a question mark over the behaviour while the supplies are ramping - is it also 4V-tolerant when VCC is at 2V for example.
Statistics: Posted by arg001 — Sat Mar 22, 2025 5:55 pm