nRF9160 COEX pins pull-down resistor

[flau]

In the nRF910 Hardware Integration document, it says "... it is mandatory to use external pull-down resistors in the size range of 100 kΩ in the COEX interface".  In my design, I only use COEX0 (without a 100 kΩ pull-down) to control a GPS LNA.  COEX1 and COEX2 are not used.  Do I still need a 100 kΩ pull-down on both unused pins?  Thank you.

[Bendik Heiskel]

Hi,

The pull-down resistors are only needed on the COEX lines that are used. No need to add them to the COEX1 and COEX2 pin in this case.

 

Best regards,

Bendik

[flau]

Thank you, Bendik.  That save a little board real estate for my routing.