MT90222 ZARLINK [Zarlink Semiconductor Inc], MT90222 Datasheet - Page 3

• Manufacturer Part Number: MT90222
• Description: 4/8/16 Port IMA/TC PHY Device
• Manufacturer: ZARLINK [Zarlink Semiconductor Inc]

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