Is DAP-LITE enough for the debug of Cortex-A7?

Hello, depending on your requirements, DAP-Lite is a minimal option for debug (not trace) of the Cortex-A7. If you are doing a more complex design (for example multi-core) you would require additional components. If you require a proper discussion on this, I suggest you raise an official support case from the menu above, else contact our Arm sales contact to discuss.