USB transformer between two devices

Thread Starter

DJ_AA

Joined Aug 6, 2021
152
Hi

I am to use a USB between a GSM module(Quectel BG95) and a microcontroller. The max speed will be 12 MB.

I have read that if you have EMC issues, then a transformer is needed, but it will reduce the speed.

Do we need to use a transformer between the module and microcontroller?
 

Thread Starter

DJ_AA

Joined Aug 6, 2021
152
Sorry, my error. Yes a common mode choke.

Yes both are ends are on the same PCB.

There is a possibility, that the module might need a firmware update, whereby, i would need to force the microcontroller in RST, while the module using a USB cable is programmed. But this is just once.
 
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