SEGGER J-Flash lite flash to nRF 52840DK using J-link Plus connected to P18 Debug In ERROR: Could not connect to target - Nordic Q&A - Nordic DevZone - Nordic DevZone
UM08003 JFlash - SEGGER Wiki
J-Link, J-Trace User Guide Datasheet by Segger Microcontroller Systems | Digi-Key Electronics
About J-Flash SPI
Load Hex file to LPC with JFlash-Lite | by Erkan Güzeler | echoHub | Medium
Unlocking and Erasing FLASH with Segger J-Link | MCU on Eclipse