We are following AP32389_TC2xx_Debug_Protection_with_HSM_V1.2.pdf application note for the configuration of UCB_DBG register.
At first, we locked the JTAG port of TC277 evaluation board with a 256-bit password -> It worked as expected and we were able to lock/unlock debug port
Later, when we tried to lock JTAG debug port of ECU with 256 bit password, locking was successful, but we cannot unlock it with the same password. Additionally, it is also observed that Tx/Rx CAN communication also stopped working after locking of debug port, and ECU current consumption is also 0 Amp.
Is this device locked forever? Is there any technique to recover ECU?
Solved! Go to Solution.