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FEATURES

? Parallel interface supporting packet and ATM cell with optimum mode selectable

? UTOPIA Level2 or POS-PHY Level2

? Master operation or slave operation

? 8-bit bus or 16-bit bus (52 MHz MAX.)

? Up to 124 ports can be connected in UTOPIA mode by combination of extension signal and port identifier.

Up to 32 ports can be connected in POS-PHY mode.

? Cell length selectable in range of 52 to 64 bytes

? General-purpose Mux/Demux mode bypassing UTOPIA/POS-PHY block supported (option mode)

? Two channels of standard LVDS driver/receiver interfaces

? Line rate of one channel: 640 to 880 Mbps. Throughput data of up to OC12 can be transferred.

? Redundant connection allowing one LVDS channel to operate as auxiliary channel supported

? On-chip PLL and clock data recovery circuit (CDR)

? Reference clock input at LVTTL or PECL level (64 to 88 MHz)

? Back pressure transmission function to prevent cell/packet loss. Flow control in port units preventing influence on throughput of other ports

? Mode setting and status check by register access via 8-bit MPU interface

? Two types of MPU interfaces selectable