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Forum Index : Microcontroller and PC projects : RP2350 and 5V tolerance
| Author | Message | ||||
| PhenixRising Guru  Joined: 07/11/2023 Location: United KingdomPosts: 857 |
Don't know if this has already been covered but: I guess it's a bit dodgy Bummer.....One guy suggested letting the RP2350 fully power-up and use a pin to enable the 5V regulator. Thoughts? |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 9110 |
The rp2350 is only 5v tolerant if powered. Applying 5v to an IO pin when not powered may kill it |
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| Volhout Guru Joined: 05/03/2018 Location: NetherlandsPosts: 4223 |
My 5 cents: In my vision it is: 5V tolerant (in all conditions) or NOT 5V tolerant. You can invent all kind of complex systems, but the risk is you get into a situation not covered by the system. Then booom. Just use 3.3V There is a sh*tload of 3V3<->5V solutions for little money. And buffering signals is always good for robustness. 4050's, optocouplers, FET level shifters, Resistor dividers, 74LVCxxx gates.... Volhout PicomiteVGA PETSCII ROBOTS |
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Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 6779 |
The Datasheet is quite specific. Page 1384 Table 14.9.4 "IOVDD MUST be powered to tolerate input voltages above 3.63V" in the same table Input high voltage can be up to 5.5V ONLY IF IOVDD is 3.3V. If you can't confirm that IOVDD is 3.3V then you have to design around all inputs only tolerating 3.6V. Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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stanleyella Guru Joined: 25/06/2022 Location: United KingdomPosts: 2120 |
While awaiting pico2 delivery I can't help remember using arduino and it was 5V logic and ili9341 etc. was 3.3V logic and using bi-directional logic converters. It was nice that pico2040 worked at 3.3V logic. hoping pico2 is the same. |
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| Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 6779 |
The Pico 2 is designed for 3V3 logic by default, so you'll be happy. :) Apart from any changes to the firmware you'll find that it's pretty much like the original Pico, only faster. Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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| stanleyella Guru Joined: 25/06/2022 Location: United KingdomPosts: 2120 |
that's all I'm hoping. if inbuilt faster speed and don't mess up existing then faster is better. great for sloppy coders, who cares, it's faster :) jokin,I spend effort making code faster Edited 2024-08-28 07:19 by stanleyella |
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