Unable to programm 52840 based device using nrf52832DK

Hi,

I am not able to program an Acconeer xm122, which is powered by an 52840. It is mounted on the Acconeer xb122 shield. My nrf52832DK is connected to the shield using a 10 pin SWD/JTAG cable.

Before I start programming my xm122 software of Acconeer was installed. This software generates log messages I saw using RTT Viewer. 

I used Segger J-Flash V8.48 for programming the device. Please see the logfile of programming the xm122 in the following lines.

Programming and verifying target (93651 bytes, 2 ranges) ...
 - Checking if selected data fits into selected flash sectors.
 - Start of determining flash info (Bank 0 @ 0x00000000)
 - End of determining flash info
 - Flash bank info:
 - 256 * 4 KB @ 0x00000000
 - 1 * 4 KB @ 0x10001000
 - Start of preparing flash programming
 - End of preparing flash programming
 - Start of determining dirty areas in flash cache
 - End of determining dirty areas
 - CPU speed could not be measured.
 - Start of flash programming
 - Programming range 0x00000000 - 0x00007FFF (  8 Sectors, 32 KB)
 - Programming range 0x00008000 - 0x0000AFFF (  3 Sectors, 12 KB)
 - Programming range 0x0000C000 - 0x00013FFF (  8 Sectors, 32 KB)
 - Programming range 0x00014000 - 0x00018FFF (  5 Sectors, 20 KB)
 - End of flash programming
 - Flash programming performed for 2 ranges (98304 bytes)
 - 0x0000 - 0xAFFF ( 11 Sectors, 44 KB)
 - 0xC000 - 0x18FFF ( 13 Sectors, 52 KB)
 - Start of verifying flash
 - ERROR: Verification failed @ address 0x00000000 (CRC: 0x00000000, Expected: 0x5F1BEFFA)
 - End of verifying flash
 - ERROR: Verify failed
 - Start of restoring
 - End of restoring
 - ERROR: Failed to program and verify target

After readback the content of flash memory I see it is blank. Please see attached Screenshot.

I appretiate for any suggestions to solve my issue.

Greetings

Thomas

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