The STM implements integration mode to enable integration testing and CoreSight topology detection. Enable this mode by setting bit 0 in the Integration Mode Control Register. The STM interfaces available for topology detection are:
one ATB master interface
cross-trigger interface, TRIGOUTSPTE, TRIGOUTSW, TRIGOUTHETE, and ASYNCOUT.
You must disable the STM for correct functionality in integration mode. If integration mode is used in the CoreSight architecture, the system must be reset before being used in functional mode.