I’m going to download from nrf52840 using j-link.
However, there is an error that recognizes well in “SEGGER”, but does not recognize in “nrf connect for desktop”.
Connecting to J-Link via USB...O.K. Firmware: J-Link ARM V8 compiled Nov 28 2014 13:44:46 Hardware version: V8.00 S/N: 1084599810 License(s): RDI,FlashDL,FlashBP,JFlash,GDBFULL VTref=3.293V Type "connect" to establish a target connection, '?' for help J-Link>connet Unknown command. '?' for help. J-Link>connect Please specify device / core. <Default>: CORTEX-M4 Type '?' for selection dialog Device>? Please specify target interface: J) JTAG (Default) S) SWD T) cJTAG TIF>s Specify target interface speed [kHz]. <Default>: 4000 kHz Speed> Device "NRF52840_XXAA" selected. Connecting to target via SWD Cannot connect to target. J-Link>