AX88852 datasheet(6/39 Pages) ASIX

6 / 39 page

AX88850

PRELIMINARY

ASIX ELECTRONICS CORPORATION

1.2 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 repeater MIBs 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-OFF-

Normal” operation procedure during/after power on reset.

• Dedicated collision LED display

• 208-pin PQFP

The AX88850 Family has the following members:

AX88851

16 shared MII ports + 2 dedicated MII ports

AX88852

8 shared MII ports + 2 dedicated MII ports

AX88853

8 PCS (Symbol) Interface ports + 2 dedicated MII ports

AX88854

AX88851 + AX88853 + management function

AX88856

MIB co-processor for intelligent Hub applications

Function availability list

Parts Number

16MII + 2MII

8MII + 2MII

8PCS + 2MII Management I/F

AX88851

AX88852

AX88853

AX88854

AX88852 Datasheet(PDF) 6 Page - ASIX Electronics Corporation

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