Hello! How can I help you with your USB Security Token schematic today? For example, I can:
- Size and assign values to your decoupling capacitors for the LDO regulator (U1) and the STM32 (U3).
- Specify the reset-cap value on NRST and add the corresponding pull-up resistor.
- Add the USB full-speed pull-up resistor on D+ and the recommended 22 Ω series resistors on D+ and D–.
Let me know which of these (or anything else) you’d like to tackle first!