Can not connect to the board. Target voltage too low?

[Exeu]

Hi,

is there any more detailed guide in how to get the firmware on the borad properly?
I never used J-Link before and Just got an original JLInk Edu. For me it is fully unclear how i need to set this now up.

If i call JLinkExe and do the following:

`SEGGER J-Link Commander V7.96g (Compiled May 8 2024 15:00:40)
DLL version V7.96g, compiled May 8 2024 15:00:19

Connecting to J-Link via USB...O.K.
Firmware: J-Link ARM V8 compiled Nov 28 2014 13:44:46
Hardware version: V8.00
J-Link uptime (since boot): N/A (Not supported by this model)
S/N: 268006668
License(s): FlashBP, GDB
OEM: SEGGER-EDU
VTref=0.530V

Type "connect" to establish a target connection, '?' for help
J-Link>connect
Please specify device / core. : NRF52
Type '?' for selection dialog
Device>NRF52833_XXAA
Please specify target interface:
J) JTAG (Default)
S) SWD
T) cJTAG
TIF>S
Specify target interface speed [kHz]. : 4000 kHz
Speed>
Device "NRF52833_XXAA" selected.

Connecting to target via SWD
Target voltage too low. Please check https://wiki.segger.com/J-Link_cannot_connect_to_the_CPU#Target_connection.
Error occurred: Could not connect to the target device.
For troubleshooting steps visit: https://wiki.segger.com/J-Link_Troubleshooting`

I enabled power with "Power ON" -> Removed the battery from my parasite board and connected the jlink to the proper pins.

I am a bit clueless what i need to do now

[Exeu]

Ok i at least solved the problem with too low volage. I now connected VCC Pin to VTRef on Jlink... then it was at least working to connect.

But i now get a different issue:

[error] [ JLink] - Failed to initialize CPU module in firmware because probe is low on memory (heap). [error] [ Client] - Encountered error -11: Command read_device_info executed for 720 milliseconds with result -11 [error] [ Worker] - Could not connect to CPU core. This may indicate that AP protection is enabled. Emulator does not have enough memory to perform the requested operation. [error] [ Client] - Encountered error -104: Command read_memory_descriptors executed for 17 milliseconds with result -104 Failed to read device memories. [error] [ nRF52] - Device memory generation failed. [error] [ Worker] - JLinkARM.dll ReadMemU32 detected a read error 1. This typically indicates the read was blocked by a memory protection mechanism. ERROR: nrfjprog failed for an unknown reason. Run the same command again with ERROR: argument --log, contact Nordic Semiconductor and provide the generated ERROR: log.log file to them.