IIS328DQ I2C Setup

[KTeng.1]

IIS328DQ CS, SCL, SDA, and SA0 pins are having internal active pull up. If I were to use I2C communication, do I need to connect CS pin to high? Since it is already had internal active pull up, I don't think that we still need it....please confirm.

[Eleon BORLINI]

Hi @KTeng.1​ , it is usually recommended to connect all the "useful" pins of the sensors to a uC, as for example shown in the STEVAL-MKI170V1 schematic below, to have the broadest possibility to manage the connections in a second time. Please note that the internal pull-ups are weak, may be subjected to external ESD disturbance. I would suggest you to connect the CS to the application processor so that you can decide after if leave it floating (internal pull-up) or force it.

Regards