Documentation Omission: IDD polarity on Nucleo-64 Boards (UM1724)

Andrew Neil · ‎2025-06-09

There's nothing in the manual which tells you which pin is source, and which is load!

PS:

Even the schematic doesn't help!

A complex system that works is invariably found to have evolved from a simple system that worked.
A complex system designed from scratch never works and cannot be patched up to make it work.

Mike_ST · ‎2025-06-10

Hello,

There is an ongoing effort to fix this on the newer designs.

Some boards have the pin "1" indication around the IDD jumper, but the schematic forget to tell which one is pin 1...

Some board have "VDD_MCU" marking on one pin, which make it clear.

For that particular board (MB1136), it is an old design, the chances that we roll out an update for that one are low.

Anyways I entered a ticket to add some indication in case it happens:

Internal ticket : #211869