What is faster interface Virtual Com via USB or Uart ?

[zvikag]

Hi,

What is the fast way to stream data from NRF52840

1) Using USB interface and virtual com (CDC) 

2) Using UART interface and extenal converter as DTFI 

Please Advise.

Zvika 

[Håkon Alseth]

Hi Zvika,

 

The maximum baud rate when using the UARTE peripheral is 1 MBaud, while the USB runs on a 12 MBit PHY, so USB CDC will be faster than "normal UART".

Here is a thread on this: https://devzone.nordicsemi.com/f/nordic-q-a/23265/max-frame-size-usb-bulk-transmision-increase-speed

Around 2.5 MBit/s seems to be the highest transfer rate using windows, based on the above thread.

 

Kind regards,

Håkon