STM32L052T8 USB Support

[Robert Smith]

Posted on May 08, 2017 at 16:55

This package for this micro is a 36 pin WLCSP. The datasheet suggests on pg12 that it supports USB but not VDD_USB, unlike others in this range. Does this mean that the USB line voltage comes from normal VDD? 

[Khouloud GARSI]

Posted on May 12, 2017 at 17:28

Hi Robert,

Indeed, for the devices were VDD_USB pin is not available, the USB transceiver and the two associated pads (PA11 and PA12) are powered by VDD;

You may refer to the 

http://www.st.com/content/ccc/resource/technical/document/datasheet/dc/d6/6d/24/86/2a/40/d3/DM00108217.pdf/files/DM00108217.pdf/jcr:content/translations/en.DM00108217.pdf

relevant to your device (table 79) to have more information about the USB electrical characterstics thar you should respect.

Khouloud.