When a device is password protected, BlueBox must send the password to the device to unlock debug interface. Before that only access to JTAG ID is available.
Password is entered in Hardware / CPU Options / SoC.
The password is accepted by MPC/SPC any time (as well when CPU is in reset).
The password is accepted by MPC/SPC after it is already released from reset. That means that regular start of emulation fails because debugger cannot unlock debug interface before reset is released. There are two solutions:
1. Hot attach.
2. Use Reset method Stop:
i. Open Hardware / CPU Options / Reset tab.
ii. In the RESET method section choose Stop from the drop-down list.
iii. Open Hardware / CPU Options / JTAG.
iv. Set Scan speed to 5000 kHz.
When Reset method Stop is selected, Reset is released, password is sent to MPC/SPC device which unlocks debug interface and after that CPU is stopped.
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