PCA6915 Dynamic multi drop / star topology

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PCA6915 Dynamic multi drop / star topology

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NaiveEngineer
Contributor I

Hi, 

i am planning to build what is effectively a sensor hub, to which i can connect small boards with i2c devices, for example sensors or fan controllers etc. 

I read about the PCA9615, which supports hot plug and multi drop. My question is similar to this one:

https://community.nxp.com/t5/Other-NXP-Products/PCA9615-in-star-topology/m-p/1838759?search-action-i...

 

But in my case, i want to be able to add and remove the devices dynamically, so i dont know the number of devices connected beforehand, just the maximum number of connected devices.

Is it possible to have a "dynamic" multi drop architecture like this with the PCA9615? Out would i need to add one for each port to make it reliable?

NaiveEngineer_0-1747471856285.png

 

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guoweisun
NXP TechSupport
NXP TechSupport

Hi 

 I suggest you need to add one for each port to make it reliable.

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