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Device-to-XP bridges (DSSBs) and register slice are optional components that can be added at XPs.
DSSB and register slice usage is mutually exclusive.
The DSSB is an optional component that provides an asynchronous bridge between the device and an XP, to allow different power, clock, or voltage domains.
The DSSB also allows the interfaces between the device and XP to be clocked source-synchronously.
Register slices are optional components that you can insert at any given XP to device interface to assist in timing closure in a CCN-502 system. This enables synchronous but higher latency communication at any point in the system.