2025-10-06 2:50 AM - last edited on 2025-10-06 2:58 AM by Andrew Neil
The datasheet of STM32U585 say that "For operation with voltage higher than Min (VDD, VDDA, VDDUSB, VDDIO2) +0.3 V, the internal pull-up and pull-down resistors must be disabled." (chap. 5.3.1).
The STEVAL-STWINBX1 use a VDDA of 2.75V and a VDD of 3.3V => Min (VDD, VDDA, VDDUSB, VDDIO2) +0.3 V = 3.05V < VDD = 3.3V.
But in the examples provided for STEVAL-STWINBX1, pull up and down are used with a VDD of 3.3V.
So which is correct, the datasheet or the examples ?