You copied the Doc URL to your clipboard.

2.1.2. APB slave interface

The APB slave interfaces provide access to the TZASC registers that enables you to program the system configuration parameters and obtain status information. See Chapter 3 Programmers Model for more information.


The APB slave interface must only be accessible to processors in Secure state, otherwise it can compromise the security of the system.

You can configure the TZASC to support either the:

  • AMBA 2 APB protocol

  • AMBA 3 APB protocol.

See the AMBA 2 APB Protocol v1.0 Specification or AMBA 3 APB Protocol v1.0 Specification for more information.


If you configure the TZASC to support the AMBA 2 APB protocol, it provides all the signals, except pready and pslverr.