OLIMEX / OLIMEX/ESP32-P4-DevKit
IO voltage levels on GPIO pins (not 3V3 but 1V8)
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- Dominant language
- C
- Stars
- 59
- Forks
- 10
- PR merge metrics
- No merged PRs in 30d
Description
I expected to use GPIO46 and GPIO47 as normal 3V3 GPIO pins.
After some debugging I found out the high level is 1.8 Volt (seems related to power domain for PSRAM?)
I am just mentioning this here so someone can find it. It took me some effort and a scope to figure this one out.
Maybe it should be documented somewhere.
gr,
Edwin
Contributor guide
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
No file or test is named; start by reviewing the repository's existing board documentation and the GPIO46/GPIO47 details in this issue. Document that these pins use a 1.8 V high level rather than 3.3 V, including the reported PSRAM power-domain context, and verify that the limitation is easy to find.
Written by the indexing model from the issue text.
Assessment
- Domain
- embedded-iot
- Issue type
- Documentation
- Difficulty
- 2/5
- Estimated time
- 1-3 hours
- Activity status
- Quiet
- Clarity
- Mostly clear
- Newbie friendliness
- 58/100