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Intel Wifi module 9260 PCIe connection


We are in process of integrating Intel Wireless-AC 9260 M.2 2230 module into custom board with Raspberry Pi CM4. Since the module uses PCIe, the connection has to be PCIe specification compliant. One of the requirements is serial AC decoupling capacitors on the PCIe data pairs. Now, RPi CM4 is specified to have the capacitors on its TX and CLOCK pairs. RX pairs are specified to require the capacitors externally.


The question is, does the 9260 module include the capacitors on-board? And if it does, what are the values of the capacitors? This information is not found on the documentation for the module. PCIe specification says that the Transmitter should have the capacitors and so RPi will have them on its TX pairs and the 9260 would have them on its TX pairs. 


The second question is does the 9260 include any other type of termination on the PCIe bus?

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Hello Pete2,  


Thank you for posting on the Intel® communities.   

I would like to let you know that we have a specific forum for this kind of issue and product, it is called the Intel Developer Zone. Since you are customizing a system and looking for documentation you will receive the appropriate support on this and other concerns you may have related to this product. 

Here you will find the links to access the website and the community forums: 

- https://software.intel.com/content/www/us/en/develop/home.html 

- https://community.intel.com/t5/Software/ct-p/software-products 

Additionally, you may need to check the Intel® Resource & Design Center where you can find additional information:

1. Website: https://www.intel.com/content/www/us/en/documentation-resources/developer.html

2. create an account: https://www.intel.com/content/www/us/en/support/articles/000058073/programs/resource-and-documentation-center.html


Please keep in mind that this thread will no longer be monitored by Intel.  



Deivid A.  

Intel Customer Support Technician  

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