AX88850

Features:

` IEEE 802.3u repeater compatible
` Supports 10 or 18 network connections optional configuration.
` 8 PCS interfaces direct interface to PHY chip with PCS interface ( ie.LUC3X04, KS8761, QSI6611, NWK914 ) to save user cost
` 16 MII interfaces to double the network connections.
` 2 dedicated MII interfaces can also support 100BASE-T4/FX PHY interfaces
` The 2 dedicated MII interfaces can also easily connect to MII interface of 100BASE MAC controller for network management purpose or other bridging devices.
` Up-to 8 repeater chips can be cascaded for large HUB application
` Low latency design supports Class II repeater implementation with large port number.
` All ports can be separately isolated or partitioned in response to fault condition
` Separate jabber and partition state machines for each port
` Separate carrier integrity monitor state machines for each port to protect network from some transient fault conditions (AX88853 PCS mode only)
` Management interface for AX88856 (MIB IC) allows all repeaterMIBs to be maintained
` Large per-port management counters to reduce CPU overhead
` External pins setup or automatic daisy chain channel setup repeater ID.
` Per-port LED display for Jabber, Partition, Link/Activity. Global utilization and collision (%) presentation.
` Power on LED diagnosis. All the LED display will follow the "ON-OFF-ON-OFFNormal" operation procedure during/after power on reset.
` Dedicated collision LED display
` 208-pin PQFP


Description

 The AX88850 Repeater Controller is a subset of a repeater set containing all the repeater-specific components and functions, exclusive of PHY components and functions. The AX88850 family has two kind of interfaces to connect to PHY devices. There are Physical coding sub-layer (PCS) interface and Media Independent Interface (MII).

The AX88850 supports 8 PCS ports interface or 2 shared bus (8 ports/per bus) MII interfaces, 2 dedicated MII ports interface, an expansion port interface, a management information base IC interface, a repeater ID daisy chain interface, a serial register interface and LED display interface.