I am using MK60FX512.
At some point, the connection is not working.
Verified that reset-b pin is low.
So I thought it was a lock, Initialization attempted.
"Kinetis Design Studio 3 IDE" , " J-LINK " , " Uvision5 "
But it doesn't erase.
Is there a way to erase the device?
It looks you did the right thing with the J-Link, or tried the obvious things. On top of this: there is the 'resurrect' action in the NXP MCUXpresso IDE starting from v10.2.0 on, see https://mcuoneclipse.com/2018/05/20/overview-of-mcuxpresso-ide-v10-2-0/
I had cases where the device ended out of reset very fast in a non-responsive mode (like if you enter low power modes or un-muxed the SWD/JTAG pins), and the J-Link was not able to get hold of the MCU . What helped me in those cases was using the P&E Universal Multilink instead, see
https://mcuoneclipse.com/2021/05/20/recovering-cortex-m-microcontroller-with-a-power-glitch/
You might try to power cycle your MCU the same way and get a chance to get hold of the MCU with the J-Link too, but that might take some time.
I hope this helps,
Erich
I tried it after purchasing it
The result was the same