SCI-PHYSaturn-Compliant Interface - Physical
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The S/UNI-DUAL can be used to replace two single-channel PHY devices, using a unique "Split-Bus" mode which configures the S/UNI-DUAL's 16-bit SCI-PHY bus into two independent 8-bit buses, one for each PHY channel to support various multi-PHY architectures.
SCI-PHY defines a synchronous 8- or 16-bit cell interface for ATM device interconnection and is a superset of `Utopia,' a basic interconnect specification adopted by the ATM Forum.
SCI-PHY improves on the Utopia spec while maintaining compatibility by defining FIFO latency management functions and supporting multiple-physical layer device connections.