MSX532 port digital crosspoint switching device using 100% non-blockin
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Application Note Next Neighbor Clocking MSX532
MSX532 port digital crosspoint switching device using 100% non-blocking switch matrix, meaning that ports connected other port (one-to-one, one-to-many, multiple ports) programmed inputs, outputs, bi-directional. MSXdevice features configuration modes such registered input (RI), registered output (RO), input enable/disable (IN), output enable/disable (OP). This application note explains next neighbor port clock source while registered input (RI) registered output (RO) mode.
Sources Next Neighbor CLK_IN Switch Matrix
Port
Sources{ Next Neighbor
CLK_OUT
Figure
MSX352 Buffer Block Diagram
Rev1.0 2000
[Doc.# MKT-MSX-NxtNborClk-ApNote]
Next Neighbor Clocking MSX532
Next Neighbor Clocking Features
There four global clock input pins MSX532. port select from three clock sources registered input (RI) registered output (RO) mode. clock sources global input clocks (refer Table third clock source next neighbor port. Port port clock source, port port clock source, etc., port port clock source while registered input (RI) registered output (RO) mode.
Table MSX532 Global Control Signals
MSX532 Port Input/Output Input/Output Input Input Output Output Number Clock Source Clock Source Enable Enable Enable Enable
Ports 0-132 Ports 133-265 Ports 266-398 Ports 399-531 CLK_0 CLK_1 CLK_2 CLK_3 CLK_1 CLK_2 CLK_3 CLK_0 IE_0 IE_1 IE_2 IE_3 IE_1 IE_2 IE_3 IE_0 OE_0# OE_1# OE_2# OE_3# OE_1# OE_2# OE_3# OE_0#
This feature useful telecom applications where different types data switching through crossbar have various associated clocks. match delays data corresponding clocks, it's common practice pass clocks through crossbar along with data.
Advantages
Using next neighbor clocking registered input (RI) mode promotes higher rate data recovery input crossbar. Using next neighbor clocking registered output (RO) mode helps reduce skew outgoing data. large number outputs switching simultaneously, next neighbor clocking registered output (RO) mode used stagger outputs reducing board noise caused simultaneous switching outputs.
[Doc.# MKT-MSX-NxtNborClk-ApNote]
2000
Next Neighbor Clocking MSX532
Examples
following examples describe next neighbor clocking MSX532.
Example 1-Using Next Neighbor Clocking with Registered Input Mode
This following diagram shows that port used data input while port used corresponding clock. Port configured registered input (RI) mode with port next neighbor clock selection. Port connected port crossbar while port connected port crossbar.
Crossbar Array
Registered Input (RI) Data
Clock
Example 2-Using Next Neighbor Clocking with Registered Output (RO) Mode
This following diagram shows that port used data input while port used corresponding clock, both configured inputs. Port connected port crossbar while port connected port crossbar. Port configured registered output (RO) mode with port next neighbor clock selection. Port clock output used register data output crossbar. Accurate port selection required next neighbor clocking registered output (RO) mode.
Crossbar Array
Data
Registered Output (RO)
Clock
2000
[Doc.# MKT-MSX-NxtNborClk-ApNote]
Next Neighbor Clocking MSX532
Summary
MSX532 offers system designers selection "global" clock signals high performance synchronous applications. next neighbor clocking scheme provides even greater level flexibility support wide range designs using multiple clock sources, different frequency clocks, asynchronous switching, using registered minimize clock/data pair skew.
Related Documents
MSX532 Data Sheet MSX532 Register Programming Manual MSXPro Software User's Guide
[Doc.# MKT-MSX-NxtNborClk-ApNote]
2000
Next Neighbor Clocking MSX532
I-Cube® registered trademark RapidConnect, RapidConfigure, IQX, MSX, MSXPro trademarks I-Cube, Inc. other trademarks registered trademarks property their respective holders. I-Cube, Inc., does assume liability arising applications product described herein; does convey license under patents, copyright rights rights others. information contained this document believed current accurate publication date. I-Cube reserves right make changes, time, order improve reliability, function, performance design order supply best product possible. I-Cube assumes obligation correct errors contained herein advise user this text correction such made. This product protected under U.S. patents: 5202593, 5282271, 5426738, 5428750, 5428800, 5465056, 5530814, 5559971, 5625780, 5710550, 5717871, 5734334, 5781717, 5790048. Additional patents pending. Next Neighbor Clocking MSX532- 1.0, 2000 Copyright 1992-2000 I-Cube, Inc. rights reserved. Unpublished-rights reserved under copyright laws United States. copyright notices precautionary does imply publication disclosure.
I-Cube®, Inc.
2605 Winchester Blvd. Campbell, 95008 Phone: Fax: Email: Internet: +(408) 341-1888 +(408) 341-1899 marketing@icube.com http://www.icube.com Next Neighbor Clocking MSX532-Application Note Revision 1.0, 2000 Document#:
2000
[Doc.# MKT-MSX-NxtNborClk-ApNote]
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