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Andrew Neil
Super User
Nov 13, 2026 4:58 PM UTC
Question

Nulceo-C5A3ZG misleading LED documentation

UM3616 Rev 2:

 

That paragraph should be indented under LD2 & LD3 as it refers to only those 2 LEDs - not to LD1

In addition, it would be better to make it explicit: “LD2 & LD3 are OFF when the STM32 I/O is in a high state, and ON when the STM32 I/O is in a low state”

Better yet, add an explicit note that this is opposite to LD1!

“LD2 & LD3 are OFF when the STM32 I/O is in a high state, and ON when the STM32 I/O is in a low state. Note that this is opposite to LD1”

 

PS:

It would also be helpful to add “Active high” on LD1 and “Active low” on LD2 & 3 in Table 7: