MT90221 Datasheet, PDF (1/114 Pages) Mitel Networks Corporation – Quad IMA/UNI PHY Device

MT90221
Quad IMA/UNI PHY Device
Features
• Cost effective, single chip, 4-port ATM IMA and
UNI processor
• Up to 4 IMA groups over 4 T1/E1 links can be
implemented
• Supports MIXED mode; links not assigned to an
IMA group can be used in UNI mode
• Versatile PCM Interface to most popular T1 or
E1 framers, reducing development time
• Supports Symmetrical and Asymmetrical
Operation
• Supports both Common Transmit Clock (CTC)
and Independent Transmit Clock (ITC) clocking
modes
• Supports T1 ISDN lines
• Provides UTOPIA Level 2 MPHY Interface
(MT90221 device slaved to ATM device)
• Complies with ITU G.804 recommendations for
performing cell mapping into T1 and E1
transmission systems
• Provides ATM framing using cell delineation
according to the ITU I.432 cell delineation
process
DS5065
ISSUE 4
December 1999
Ordering Information
MT90221AL 208 Pin MQFP
-40°C to +85°C
• Provides Header Error Control (HEC)
verification and generation, error detection,
Filler cell filtering (IMA mode) and Idle/
Unassigned cell filtering (UNI mode)
• Provides statistics to support MIB
• Connects to popular asychronous SRAM
• Provides statistics on the number of HEC errors
• 8 bit Microprocessor Interface, compatible with
Intel and Motorola
• 3.3V operation / 5V tolerant inputs
• MQFP-208 pin
• JTAG Test support
RX External Static RAM
Utopia
Level 2
BUS
Utopia
I/F CTRL
Utopia FiFo
Processor I/F
4 Internal
IMA
Processors
4_....
1
Cell
Delineator
4 x CD Circuit
Transmission ^4....
Convergence 1
4 x TC Circuit
T1/E1
Framers
2.048 or
1.544 Mb/s
P/S
T1/E1
Framers
P/S
T1/E1
Framers
4 Serial PCM Ports
Figure 1 - MT90221 Block Diagram with Built-in IMA functions for 4 IMA Groups over up to 4 links
1