No external termination series resistors are required on USB

[stm32forum]

Posted on October 08, 2015 at 13:07

According the datasheet of the L476rx on page 187;

3. No external termination series resistors are required on USB_DP (D+) and USB_DM (D-); the matching impedance is already included in the embedded driver. 

If I understand this correct you can don't need the 2x27 ohm resistors you see in almost every design with USB.

If this is true, why are they then on the Stm32L476G-Discovery?

[stm32forum]

Posted on October 12, 2015 at 12:40

Bump...