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

[Rddk]

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.

 

[FBL]

Hi ​@Rddk 

Similar question is raised about the same topic in this thread.

CSI_REXT requires a 200Ω resistor to GND with 1% tolerance because it is specific to the CSI PHY IP, which includes a calibration machine relying on this external reference resistor.

 

[Rddk]

Hi ​@FBL 
 

Thank you for your aswer, but it only partially answered my questions.

I am sightly confused, in MCU manual and design notes is directly written that VDDCSI must be connected to the same potential as VDDCORE.

When I am not using CSI, can I really connect VDDCSI and VDDA18CSI to (VSS) GND? 
And what about CSI_REXT? Where connect it, when am not using CSI? 

 

Rddk.