29.6.2.4 Host Interface

The pPP can be controlled by the host processor through an APB interface and the user interface registers. This is referred to as the “host interface”. Some configurations are only accessible when the pPP is stopped. The host interface includes pPP flags, which are also called host flags on the firmware, for interprocessor communications. The user interface registers can run, stop and reset the pPP and read the IRQ host flags. Nevertheless, the mailbox remains the main means of communication.