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July 22, 2026
Question

STM32N6 CSI interface - must be in this case resistor at the CSI output CSI_REXT?

  • July 22, 2026
  • 0 replies
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Hi,

In my project with STM32N6 am not using CSI interface, so in this case, all CSI pins are not connected.
But what about CSI output CSI_REXT where according to the manual must be connected 200 Ohm resistor to GND?

Can I keep this pin unconncted too? 
In the manual there is only information that resistor is for setting current for RX/TX driver. 

Similar situation is in USB interfaces, but in STM32N6 Nucleo-144 development board is one of the USB completly unconnected (including OTG2_TXRTUNE pin with similar function like CSI_REXT pin). Which I take as an aswer in case of USB.


I dont know what is diferences in internal structure between RX/TX driver in USB and CSI, but i case of USB in my project (USB is not used too) i wil keep every pins unconnected. But can I afford it in case of CSI?

 

Thanks a lot.

Rddk.