2.2.3 Redistributor Q-Channel

The Redistributor has a single Q-Channel input that is used to ensure that the Redistributor can be safely clock-gated hierarchically.

If the Redistributor is busy, actively processing interrupts or sending messages up or downstream, the Q‑Channel denies a quiescence request, qreqn, by asserting the qdeny signal. For more information, see the AMBA® Low Power Interface Specification, Arm® Q‑Channel and P‑Channel Interfaces.

Note:

The qreqn input is synchronized inside the Redistributor.

The qactive signal is connected to the PPI wires directly, and must be considered as an asynchronous output.

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