MT90221 Zarlink Semiconductor, MT90221 Datasheet - Page 4

• Manufacturer Part Number: MT90221
• Description: Quad Inverse Multiplexing For Atm (IMA) Device With Flexible Ima And Uni Mode
• Manufacturer: Zarlink Semiconductor

1.0 Device Architecture ....................................................................................................................................... 8
2.0 The ATM Transmit Path ................................................................................................................................. 9
3.0 The ATM Receive Path................................................................................................................................. 15
1.1 Software Functions..................................................................................................................................... 8
1.2 Hardware Functions ................................................................................................................................... 9
2.1 Cell_In_Control........................................................................................................................................... 9
2.2 The ATM Transmission Convergence ...................................................................................................... 10
2.3 Parallel to Serial PCM Interface ............................................................................................................... 11
2.4 ATM Transmit Path in IMA Mode ............................................................................................................. 11
2.5 ATM Transmit Path in UNI Mode ............................................................................................................. 14
3.1 Cell Delineation Function ......................................................................................................................... 15
3.2 De-Scrambling and ATM Cell Filtering ..................................................................................................... 16
3.3 ATM Receive Path in IMA Mode .............................................................................................................. 16
1.1.1 Link State Machines........................................................................................................................... 8
1.1.2 IMA Group State Machines ................................................................................................................ 8
1.1.3 Link Addition, Removal or Restoration............................................................................................... 8
1.1.4 Interrupt.............................................................................................................................................. 8
1.1.5 Signaling and Rate Adjustment.......................................................................................................... 8
1.1.6 Performance Monitoring..................................................................................................................... 8
2.2.1 TX Cell Ram and TX FIFO Length ................................................................................................... 10
2.4.1 IMA Frame Length (M) ..................................................................................................................... 11
2.4.2 Position of the ICP Cell in the IMA Frame........................................................................................ 11
2.4.3 Transmit Clock Operation ................................................................................................................ 11
2.4.4 Stuff Cell Rate .................................................................................................................................. 12
2.4.5 IMA Data Cell Rate .......................................................................................................................... 12
2.4.6 IMA Controller (RoundRobin Scheduler).......................................................................................... 12
2.4.7 ICP Cell Generator........................................................................................................................... 12
2.4.8 IMA Frame Programmable Interrupt ................................................................................................ 14
2.4.9 Filler Cell Definition .......................................................................................................................... 14
2.4.10 TX IMA Group Start-Up.................................................................................................................... 14
2.4.11 TX Link Addition ............................................................................................................................... 14
2.4.12 TX Link Deletion............................................................................................................................... 14
3.3.1 ICP Cell Processor........................................................................................................................... 17
3.3.2 Out of IMA Frame (OIF) Condition ................................................................................................... 18
3.3.3 Link Out Of IMA Frame (LIF) Synchronization ................................................................................. 18
3.3.4 Filler Cell Handling ........................................................................................................................... 18
3.3.5 Stuff Cell Handling ........................................................................................................................... 18
3.3.6 Received ICP Cell Buffer .................................................................................................................. 18
3.3.1.1 IMA Frame Synchronization...................................................................................................... 17
3.3.1.2 Link Information......................................................................................................................... 18
3.3.1.3 RX OAM Label .......................................................................................................................... 18
Table of Contents
MT90221
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