2.2.6 Clock and power control interfaces
The CCI-550 includes the ARM® Q-Channel and P-Channel interfaces to control clock and power states.
To save power, the CCI-550 has:
Q-Channel interface that
to determine how to control the clock state of devices.
- A P-Channel interface that you can use to control the power state of the snoop
filter RAMs within the CCI-550, for example, enabling a retention state.
See the Low Power Interface Specification, ARM® Q-Channel and
P-Channel Interfaces for more information.