how to erase application only without erasing uicr with nrfjprog

Question

Excuse me： 
 The chip can individually erase the application without erasing the uicr with nrfjprog？Which nrfjprog command is used to erase the application only，I want to program the .hex file only without erasing uicr.

Jared · Answer

Hi, 
 Use the --sectorerase option. See nrfjprog --help to get a complete list over all of the commands and sub-commands. 
 If --sectorerase is given, only the targeted non-volatile memory pages, excluding UICR, is erased 
 regards 
 Jared