SIM_DET pin in use or not ?

[J Jarmuzek]

I need to know in which case the SIW_DET pin is used. Does it depend on the version of the nRF9160 ? Then which versions ?

And is this detection function better in software or hardware ?

[Albrecht Markus Schellenberger]

Hello,

according to the Pin assignments of the nRF9160 Product Specification, SIM_DET is not used and needs to be left floating.

Regards,

Markus

[J Jarmuzek]

Hi, thanks for your answer

The problem is that on the thingy91 this pin is connected to the sim holder which have a switch mounted. It can be disconnected by removing an R0 but I don't undstand why the design would be made this way if the SIM_DET is not in use in every versions of the nRF9160.

Regards,

Jean

[Albrecht Markus Schellenberger]

J Jarmuzek said:

The problem is that on the thingy91 this pin is connected to the sim holder which have a switch mounted. It can be disconnected by removing an R0 but I don't undstand why the design would be made this way if the SIM_DET is not in use in every versions of the nRF9160.

Thanks for your feedback, Jean!

I’m not a hardware expert, but to me it looks like that SIM_DET is not connected neither on the Thingy:91, see picture below.

Regards,

Markus

[J Jarmuzek]

Hi,

Can you tell me what version it is ? Mine is the 1.4.0 and the SIM_DET is connected :

Regards,

Jean

[Albrecht Markus Schellenberger]

J Jarmuzek said:

Can you tell me what version it is ? Mine is the 1.4.0 and the SIM_DET is connected :

Good point, Jean! This was changed in the latest version of the Thingy:91, v1.6.0.

Regards,

Markus