2024-09-05 10:24 AM
Is it OK to use these pins as current sinks for driving LEDs ?
2024-09-05 10:37 AM - edited 2024-09-05 10:39 AM
Hello @Andrew Neil
As it is mentionned on the 3rd line of the note on the screenshot:
"These GPIOs must not be used as current sources (e.g. to drive an LED)." For Curent sink, i will check this and get back to you ASAP.
Best Regards.
STTwo-32
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2024-09-05 10:47 AM - edited 2024-09-05 10:52 AM
Good question, the P/N gates probably the same size, but the ground ring is probably more robust, and not gated like VDD/VBAT path
I'd tend toward it being Ok, but will watch for the official response.
Slack pins for LEDs, the PA13/PA14 often can be used and still facilitate debug connectivity if the code is aware.
2024-09-05 10:57 AM
plus the reason stated for the limitation is that these pins are fed "through the power switch", and that's what limits their sourcing capabilities.
I presume this is "the power switch":
On that basis, if it's the whole story, sinking should be OK ... ?
"the switch only sinks (sic?) a limited amount of current" sounds like a typo, though?