How Can I use External Segger J-Link(EDU) with PCA10028?

[Daniel T. Lee]

It seems that my j-link chip on PCA10028 is dead.

I'm not sure How I can Fix it.. so I'd like to use external Debugger(?? I don't know how it called) Instead with PCA10028.. (for flash new application)

(Actually, I Really Want to fix my segger chip if i could. But MCU's Bootloader mode is not working, and also the LD5 right next to j-link chip doesn't work either. No Blink at all..)

Anyway. I tried with my J-link Edu with PCA10028 as pinout like this.

PCA10028 | J-link EDU
RESET | RESET
GND | GND
SWO | SWO
SWDCLK | SWDCLK
VTG | VTref <---- I'm not sure with this
VDD | 5V-Supply
VnRF | ???? <--- which pin do I have to plug?

I've plugged like this, and when I turn on my NRF-go Studio, Then It cannot find anything! It just Says No device detected. And Try to Recover.

I've tried everything but It doesn't work at all.

Is there anything that i've done wrong? Which action do I have to fix this?

(+ IS there ANY WAY That I can FIX Segger CHIP? or Just find out whether it is broken or not? )

[Vala]

Hi Daniel T. Lee, You need only four pins for programming nRF series: SWIO, SWCLK, GND and VTref. And you should power your device for example by USB (it must be on). Connect VTref to the power of nRF which is accessible on several points of the board. This line determines the level of digital signals coming from Jlink.