MT90520AG ZARLINK [Zarlink Semiconductor Inc], MT90520AG Datasheet
MT90520AG
Manufacturer Part Number
MT90520AG
Description
8-Port Primary Rate Circuit Emulation AAL1 SAR
Manufacturer
ZARLINK [Zarlink Semiconductor Inc]
Datasheet
1.MT90520AG.pdf
(180 pages)
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Features
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UTOPIA
Interface
AAL1 Segmentation and Reassembly device
compliant with Circuit Emulation Services (CES)
standard (af-vtoa-0078.000)
Supports both Unstructured and Structured
Circuit Emulation of 8 independent DS1/E1/ST-
BUS interfaces
Supports AAL1 trunking, with up to 128 TDM
channels per VC (af-vtoa-0089.001)
Supports CAS transmission and reception in all
structured modes of operation
Supports simultaneous processing of up to 256
bidirectional Virtual Circuits
Supports mixed DS1/E1 operation
Supports mixed Unstructured and Structured CES
operation
Fully flexible DS0 assignment
Complete clock recovery solution provided on-
chip: Synchronous, Adaptive, or Synchronous
MT90520
Zarlink, ZL and the Zarlink Semiconductor logo are trademarks of Zarlink Semiconductor Inc.
OUTPUT
UTOPIA
UTOPIA
BLOCK
BLOCK
INPUT
Scan Logic
Boundary-
Interface
Copyright 2002-2004, Zarlink Semiconductor Inc. All Rights Reserved.
JTAG
(UDT, SDT,
RX SARs
Figure 1 - MT90520 Block Diagram
SAR
TX
Data)
VC Look-Up
Table
Zarlink Semiconductor Inc.
External Memory Controller
Segmentation / Reassembly
1
Memory
Memory
Local
Local
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Circular Buffers
Residual Time Stamp (SRTS) via 8 independent
PLLs
Dual-mode (ATM-end or PHY-end) UTOPIA port
operates in Level 1 or Level 2 mode for
connection to external PHY or ATM devices with
UTOPIA clock rate up to 52 MHz
TDM bus provides 8 bidirectional serial streams
at 1.544, 2.048, or 4.096 MHz - compatible with
Generic (1.544 Mbps or 2.048 Mbps) and ST-
BUS (2.048 Mbps) interfaces
Supports master and slave TDM backplane bus
clock operation
Supports TDM and UTOPIA loopback functions
16-bit microprocessor port, configurable to
Motorola or Intel timing
Master clock rate of 66.0 MHz
16-bit Microprocessor
Microprocessor
Interface Logic
MT90520AG
Rx/Reassembly (X 8)
Tx/Segmentation (X 8)
Interface
PLL
Circuit Emulation AAL1 SAR
Management
Ordering Information
OUTPUT
BLOCK
Clock
BLOCK
INPUT
-40 to +85°C
TDM
External
Synchronous
SRAM (ZBT)
TDM
456 Pin Plastic BGA
8-Port Primary Rate
Clock Control
/Recovery
Interface
TDM Output
Interface
TDM Input
Interface
Data Sheet
MT90520
January 2004
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