If I want to modify 9160dk to a new board but not include heardware chip nrf52840, is it possible?
and
what function can not use like bluetooth

Question

If I want to modify 9160dk to a new board but not include heardware chip nrf52840, is it possible? and what function can not use like bluetooth

JONATHAN LL · Accepted Answer

Hi, in short: Yes that is correct The nrf9160 is a Arm cortex M33 application processor so to debug\program you need something that supports that model. If we take a look at the overview at Segger we can see what supports what. 
 As a alternative to that you could use a nrf5340 DK or a nrf9160 DK to program\debug a nrf9160 device. 
 
 As for IDE/environments we do recommend SES(Segger Embeddeb Studio), but you can use whatever you like, many do use VScode. Here si a diffrent question here on Devzone regarding the VScode: https://devzone.nordicsemi.com/f/nordic-q-a/66509/setting-up-a-workspace-in-visual-studio-code 
 Here is a toturial on NCS version 1.3.0 and here is the documetaion . Regards, Jonathan