Hi,
I am working on an FRDM-KL25Z board. But the MKL24Z128xx chip was secured accidentally, the on-board OpenSDA can not unlock this chip, so I try to using "unlock kinetis" command in Jlink commander, but it also can not be unlocked successfully, and Jlink commander displays the following message.
===================================================
SEGGER J-Link Commander V4.56 ('?' for help)
Compiled Oct 22 2012 19:40:24
DLL version V4.56, compiled Oct 22 2012 19:40:04
Firmware: J-Link ARM V8 compiled Sep 20 2012 13:27:01
Hardware: V8.00
S/N:
Feature(s):
VTarget = 3.002V
Info: Found SWD-DP with ID 0x0BC11477
****** Error: Could not read AHB-AP Id. Could not connect to target.
Info: Found SWD-DP with ID 0x0BC11477
No devices found on JTAG chain. Trying to find device on SWD.
Info: Found SWD-DP with ID 0x0BC11477
****** Error: Could not read AHB-AP Id. Could not connect to target.
Info: Found SWD-DP with ID 0x0BC11477
No device found on SWD.
Failed to identify target. Trying again with slow (4 kHz) speed.
Info: TotalIRLen = ?, IRPrint = 0x..000000000000000000000000
Info: TotalIRLen = ?, IRPrint = 0x..000000000000000000000000
No devices found on JTAG chain. Trying to find device on SWD.
Info: Found SWD-DP with ID 0x0BC11477
****** Error: Could not read AHB-AP Id. Could not connect to target.
Info: Found SWD-DP with ID 0x0BC11477
No device found on SWD.
J-Link>unlock kinetis
Unlocking device...Timeout while unlocking device.
J-Link>
===================================================
How to unlock a secured Kinetis L MCU with a JLink? Does Jlink support such feature of unlocking Kinetis L MCU?
Thanks!
I am working on an FRDM-KL25Z board. But the MKL24Z128xx chip was secured accidentally, the on-board OpenSDA can not unlock this chip, so I try to using "unlock kinetis" command in Jlink commander, but it also can not be unlocked successfully, and Jlink commander displays the following message.
===================================================
SEGGER J-Link Commander V4.56 ('?' for help)
Compiled Oct 22 2012 19:40:24
DLL version V4.56, compiled Oct 22 2012 19:40:04
Firmware: J-Link ARM V8 compiled Sep 20 2012 13:27:01
Hardware: V8.00
S/N:
Feature(s):
VTarget = 3.002V
Info: Found SWD-DP with ID 0x0BC11477
****** Error: Could not read AHB-AP Id. Could not connect to target.
Info: Found SWD-DP with ID 0x0BC11477
No devices found on JTAG chain. Trying to find device on SWD.
Info: Found SWD-DP with ID 0x0BC11477
****** Error: Could not read AHB-AP Id. Could not connect to target.
Info: Found SWD-DP with ID 0x0BC11477
No device found on SWD.
Failed to identify target. Trying again with slow (4 kHz) speed.
Info: TotalIRLen = ?, IRPrint = 0x..000000000000000000000000
Info: TotalIRLen = ?, IRPrint = 0x..000000000000000000000000
No devices found on JTAG chain. Trying to find device on SWD.
Info: Found SWD-DP with ID 0x0BC11477
****** Error: Could not read AHB-AP Id. Could not connect to target.
Info: Found SWD-DP with ID 0x0BC11477
No device found on SWD.
J-Link>unlock kinetis
Unlocking device...Timeout while unlocking device.
J-Link>
===================================================
How to unlock a secured Kinetis L MCU with a JLink? Does Jlink support such feature of unlocking Kinetis L MCU?

Thanks!