NRF54L15 Zephyr Blinky Sample did not start at Power on

[Gerd Breidenstein]

Hi

The Blinky Programm only starts when I give the reset Go command via jlink commander.

At Power cycle nothing happens.

If i give the SOC an external Pin reset the running programm stops but never starts

[Gerd Breidenstein]

I used jlink commander for flashing

J-Link>erase
No address range specified, 'Erase Chip' will be executed
'erase': Performing implicit reset & halt of MCU.
Reset type: NORMAL (wiki.segger.com/J-Link_Reset_Strategies)
Reset: ARMv8M core with Security Extension enabled detected. Switch to secure domain.
Reset: Halt core after reset via DEMCR.VC_CORERESET.
Reset: Reset device via AIRCR.SYSRESETREQ.
Erasing device...
J-Link: Flash download: Total time needed: 0.231s (Prepare: 0.080s, Compare: 0.000s, Erase: 0.085s, Program: 0.000s, Verify: 0.000s, Restore: 0.065s)
Erasing done.
J-Link>loadbin zephyr.hex 0x0 reset
'loadbin': Performing implicit reset & halt of MCU.
Reset type: NORMAL (wiki.segger.com/J-Link_Reset_Strategies)
Reset: ARMv8M core with Security Extension enabled detected. Switch to secure domain.
Reset: Halt core after reset via DEMCR.VC_CORERESET.
Reset: Reset device via AIRCR.SYSRESETREQ.
Downloading file [zephyr.hex]...
J-Link: Flash download: Bank 0 @ 0x00000000: Skipped. Contents already match

[Gerd Breidenstein]

I also checked west flash option. Same behaviour

[MagnusPersson]

Hello Sir,

Which version of the nRF Connect SDK are you using?

Best Regards,

Magnus

[Gerd Breidenstein]

Hi Magnus
I used pure Zephyr

[MagnusPersson]

Hi,

OK, this I have no experience of. I have used nRF Connect SDK 2.7 and found that this worked for me.

Best Regards,

-Magnus

[Gerd Breidenstein]

I compiled with NRF Connect 2.8 and the port toggle programm runs 
With pure zephyr the hex file size is 95kb
With NRF Connect the hex file size is 233kb

Could you help me to find the reason?
Maybe a there is no startup/boot section included