Datasheet > MT90223AG

MT90223AG

更新时间： 2024-02-16 13:19:58

品牌	Logo	应用领域
加拿大卓联 - ZARLINK		/
页数	文件大小	规格书
155页	895K
描述
4/8/16 Port IMA/TC PHY Device

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MT90223AG 数据手册

MT90222/3/4

Data Sheet

The device provides up to 8 internal IMA processors and allows for bandwidth scaleability.

The implementation of IMA as per AF-PHY-0086.001 Inverse Multiplexing for ATM (IMA) Specification Version 1.1

is divided into hardware and software functions. Hardware functions are implemented in the MT90222/3/4 device

and software functions are implemented by the IMA Core (Zarlink or user) software. Additional hardware functions

are included to assist in the collection of statistical information to support MIB implementation.

Hardware functions that are implemented in the MT90222/3/4 device are:

•

Utopia Level 1 or 2 compatible MPHY Interface

Incoming HEC verification and correction (optional)

Generation of a new HEC byte

Format outgoing bytes into multi-vendor TDM formats

Retrieve ATM Cells from the incoming multi-vendor TDM format

Perform cell delineation

Cell pre-processing

Provide various counters to assist in performance monitoring

TDM expansion ring to span multiple devices

Hardware functions that are implemented by the IMA processor in the MT90222/3/4 device are:

•

Transmit scheduler (one per IMA group)

Generation of the TX IMA Data Cell Rate clock

Generation and insertion of ICP cells, Filler Cells and Stuff Cells in IMA mode and Idle Cells in TC mode; the

ICP cells are programmed by the user and the Filler and Idle cells are pre-defined

•

Perform IMA Frame synchronization

Retrieve and process Rx ICP cells in IMA Mode

Management of RX links to be part of the internal re-sequencer when active

Extraction of RX IMA Data Cell Rate clock

Verification of delays between links

Perform re-sequencing of ATM cells using external asynchronous Static RAM

Can accommodate more than 200 msec of link differential delay depending on the amount of external

memory

•

Provide structured Interrupt scheme to report various events

Zarlink Semiconductor Inc.

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