cant detect nrf52 with segger once I flashed the bootloader (sdk11)

[makouda]

I'm trying to flash the bootloader on an nrf52 device. the microcontroller is detected successfully with segger. but then when I flash the bootloader given with sdk11 (dual bank 132) I can no longer detect the nrf52 device with segger. it's really strange because it made this for all the devices I tried.

how can the bootloader brick the nrf52 device? is there somewhere in the bootloader code where SWDIO and SWDCLK are affected? . the device should be detected with segger no matter what's in the flash.

IS SERIAL TRACING ENABLED ON THE BOOTLOADER ????

here the schematic of my board

[makouda]

nrfjprog --recover worked but after changing FAMILY to NRF52 in nrfjprog.ini file