To what voltage should the D+ line be pulled up when designing USB connection in STM32? +5V or +3.3V? All documentation and dev board scematics says it's 3.3V, but it didn't work.
ON Semiconductor Is Now
STM32F103 USB circuit
Pull-up and Pull-down Resistors | Resistor Applications | Resistor Guide
Configuring a micro-controller for low-speed USB communication
1.5k D+ pull-up should be to 3.3v, not 5v · Issue #8 · AcheronProject/SharkPCB · GitHub
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EmbeddedGeeKs - USB Speeds
USB Made Simple - Part 3
Simple way to use USB Type-C to get 5V at up to 3A (15W) - Power - Electronic Component and Engineering Solution Forum - TechForum │ Digi-Key
Do I need a pull-up resistor for this USB ? : r/AskElectronics
All About USB-C: Resistors And Emarkers | Hackaday
OMAP-L138 internal pull resistors - Processors forum - Processors - TI E2E support forums
USB in a NutShell - Chapter 2 - Hardware
Pull-up Resistors - SparkFun Learn
AN0046: USB Hardware Design Guidelines
pullup - Pull-up and pull-down in USB differential line and logic levels - Electrical Engineering Stack Exchange
Project | Lifetime fails project | Hackaday.io
Usb Type C Cable 3.3 Feet, 2-pack Usb C To Usb 3.0 Cable With 56k Ohm Pull-up Resistor, Compatible For Samsung Galaxy S10e, S10 - Data Cables - AliExpress
microcontroller - USB resistor locations - Electrical Engineering Stack Exchange
