unable to detect nrf52810 via nrf52 DK

[GHSN]

I have a module BL651 and I want to use it in my dev board. I've found in some previous posts that I have to use nrf52 DK to program externally the nrf52810 in my module.

Using the nrf connect, I can't detect the nrf52810.

The connection was made this way:

Without connecting the VTG, I can access to the nrf52832 in the nrf52 DK. 

With VTG, I got this error :

"Could not fetch memory size of target devkit: Error: Error occured when get library info. Errorcode: CouldNotOpenDevice (0x4) Lowlevel error: JLINKARM_DLL_ERROR (ffffff9a)"

So what is the problem here? Is it the connection or something that I've mised?

[GHSN]

Anyone can answer my question plz

[Jørgen Holmefjord]

Can you post an image of your connections? Is the voltage level of VDD/VTG correct after you connect the board? Can you try to use nrfjprog directly to erase/flash the custom board? It may provide more helpful error than nRF Connect Programmer app.

[GHSN]

This is what i have with nrfjprog.

Does the  readback protection capability have to do with my problem?

[awneil]

It would be a lot better  to copy & paste the text - rather than a picture.

Post the text as for source code - just omit step 3.

Doesn't the nRF51 have SWD - not JTAG ?

[GHSN]

This is what i get when using SWD connection :

Type "connect" to establish a target connection, '?' for help
J-Link>connect
Please specify device / core. <Default>: NRF52810_XXAA
Type '?' for selection dialog
Device>NRF52810_XXAA
Please specify target interface:
J) JTAG (Default)
S) SWD
T) cJTAG
TIF>S
Specify target interface speed [kHz]. <Default>: 4000 kHz
Speed>
Device "NRF52810_XXAA" selected.

Connecting to target via SWD
InitTarget() start
InitTarget() end
Found SW-DP with ID 0x2BA01477
DPIDR: 0x2BA01477
Scanning AP map to find all available APs
AP[0]: Stopped AP scan as end of AP map has been reached
Iterating through AP map to find AHB-AP to use
InitTarget() start
InitTarget() end
Found SW-DP with ID 0x2BA01477
DPIDR: 0x2BA01477
Scanning AP map to find all available APs
AP[0]: Stopped AP scan as end of AP map has been reached
Iterating through AP map to find AHB-AP to use

****** Error: Could not find core in Coresight setup

InitTarget() start
InitTarget() end
Found SW-DP with ID 0x2BA01477
DPIDR: 0x2BA01477
Scanning AP map to find all available APs
AP[0]: Stopped AP scan as end of AP map has been reached
Iterating through AP map to find AHB-AP to use
InitTarget() start
InitTarget() end
Found SW-DP with ID 0x2BA01477
DPIDR: 0x2BA01477
Scanning AP map to find all available APs
AP[0]: Stopped AP scan as end of AP map has been reached
Iterating through AP map to find AHB-AP to use

****** Error: Could not find core in Coresight setup

Cannot connect to target.