FRDM-MCXN947 Cannot download program to chip

[dreamdf]

MCUXpresso IDE RedlinkMulti Driver v24.9 

Reconnected to existing LinkServer process.

Connecting to probe 1 core 0 (using server started externally) reports:

Could not connect to core

I flash my program via kiel a few times.I come across debug abort when i try to

debug.Then I lost my board, series port works well, but cannot flash new project

[diego_charles]

Hi @dreamdf 

It seems that your MCU is temporally bricked.

To recover the debug access, please try to set the MCU into ISP mode, this way bootROM will execute, setting the MCU into a known state. Once it is set into this state, please try to do a mass erase and program your application one more time. 

Please let me know your results.

Diego

[dreamdf]

I use MCUXpresso Secure Provisioning Tool flash a demo successfully.

Program run normally.

But cannot flash KEil project bin file.Program doesnot run.

Still canont download file via keil or MCXpresso IDE

Program MCU-Link CMSIS-DAP - CNXPMCU-LINK_installer cannot updata debugger.

[dreamdf]

I downloaded blhost and entry isp mode successfully, I erased flash and downloaded a offical demo.But My Board still doesnot work after resetting.

[dreamdf]

Hello,How can I set the FRDM-MCXN947 into ISP mode,And what should I do to erase the flashed program.
Sorry for this simple question, I am a Newbie