MT90840AP Zarlink, MT90840AP Datasheet - Page 8

• Manufacturer Part Number: MT90840AP
• Description: Switch Fabric 512 x 2430/512 x 512/2.373K x 2.373K 5V 84-Pin PLCC Tube
• Manufacturer: Zarlink

Specifications of MT90840AP

• Package: 84PLCC
• Number Of Ports: 16
• Fabric Size: 512 x 2430|512 x 512|2.373K x 2.373K
• Switch Core: Non-Blocking
• Port Speed: 8.192|4.096|2.048 Mbps
• Operating Supply Voltage: 5 V

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The number of time slots available is dependent upon the selected data rates, and is reduced at lower data rates.
Figure 1 shows the MT90840 functional block diagram. The figure shows the TDM data paths and the device
interfaces.
The MT90840 has three main TDM data paths:
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In addition, Zarlink Message Mode capabilities allow the user to force data on TDM output time slots and to monitor
TDM input time slots through the microprocessor port.
The MT90840 has four main interfaces:
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The MT90840 supports four major timing/switching modes:
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Other features of the MT90840 are programmable for individual TDM channels on the serial and parallel ports (per-
channel features):
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• 2430 parallel output time slots.
Transmit Path: serial port input (STi) to parallel port output (PDo),
Receive Path: parallel port input (PDi) to serial port output (STo),
Bypass and Parallel-Switching: PDi to PDo.
the serial TDM bus interface (STi, STo and timing),
the parallel TDM bus interface (PDi, PDo and timing) with programmable control outputs (CTo),
the microprocessor (CPU) interface,
the test interface (JTAG).
TM1/Ring Master: PDo timing slaved to STi/o timing, PDi timing elastic;
TM2/Ring Slave: PDo and STi/o timing slaved to PDi;
TM3/Bus Slave: PDo and PDi timing tied together, STi/o timing slaved to parallel bus;
TM4/Parallel Switching: parallel channel switching from PDi to PDo.
Zarlink Message Mode,
Per-channel output enable,
Per-channel bypass (parallel bus),
Programmable CTo control outputs (parallel bus),
Per-channel direction control (serial bus).
Zarlink Semiconductor Inc.
MT90840
8
Data Sheet