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| RELEASED SNOW BOARD ERRATA PMC-980951 ISSUE 2 PM5342 SPECTRA-155 SONET/SDH NODE OPTICAL INTERFACE FOR WAN REFERENCE DESIGN (SNOW BOARD) ERRATA PM5342 SPECTRA-155 SONET/SDH NODE OPTICAL INTERFACE FOR WAN NETWORKS REFERENCE DESIGN (SNOW BOARD) REFERENCE DESIGN ERRATA RELEASED ISSUE 2: MARCH 1999 PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS' INTERNAL USE i RELEASED SNOW BOARD ERRATA PMC-980951 ISSUE 2 PM5342 SPECTRA-155 SONET/SDH NODE OPTICAL INTERFACE FOR WAN REFERENCE DESIGN (SNOW BOARD) ERRATA CONTENTS 1 2 ISSUE 2 ERRATA ..................................................................................... 1 SNOW BOARD REFERENCE DESIGN SCHEMATIC ERRORS ............. 2 2.1 COLLIDING SIGNALS ON EXPANSION INTERFACE .................. 2 PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS' INTERNAL USE ii RELEASED SNOW BOARD ERRATA PMC-980951 ISSUE 2 PM5342 SPECTRA-155 SONET/SDH NODE OPTICAL INTERFACE FOR WAN REFERENCE DESIGN (SNOW BOARD) ERRATA 1 ISSUE 2 ERRATA This document is the errata notice for Issue 1 of the PM5342 SPECTRA-155 SONET/SDH Node Optical Interface for WAN Networks Reference Design (SNOW BOARD) Rev 2.0 (document number PMC-970285). PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS' INTERNAL USE 1 RELEASED SNOW BOARD ERRATA PMC-980951 ISSUE 2 PM5342 SPECTRA-155 SONET/SDH NODE OPTICAL INTERFACE FOR WAN REFERENCE DESIGN (SNOW BOARD) ERRATA 2 SNOW BOARD REFERENCE DESIGN SCHEMATIC ERRORS This section describes errors and required corrections on the schematics provided with the SNOW Board Reference Design. 2.1 Colliding Signals on Expansion Interface An error occurs when two SNOW boards are mated through the ring expansion interface. On page 10 of the SNOW Board Reference Design schematics, pins SS28, SS29, SS30, and SS31 are connected to an octal buffer/line driver (U2). The output signals GDAT3/SDMTOCLK2, GDAT4/SDMTOCLK3, GDAT5, and GDAT6 connect to signals 15 to 18 of SYS_ADD<21..0> on page 11. These signals connect to pins A74, A73, A67, and A68 of the expansion interface connector as shown on page 13. A mated SNOW board will receive these signals on the mirror image of the expansion interface. Pins A28, A29, A33, and A34 of the mated SNOW Board's ring expansion connector will receive the output signals of A74, A73, A67, and A68 of the first SNOW Board. Pins A28, A29, A33, and A34 are signals EXP_GDAT3/SDMTOCLK2, EXP_GDAT4/SDMTOCLK3, EXP_GDAT5, and EXP_GDAT6 which change name to SS_I<28>, SS_I<29>, SS_I<30>, and SS_I<31> as shown on page 12. On page 10, these signals connect to the output of an octal buffer/line driver (U2). Notice that the output of octal buffer/line driver (U2) of one SNOW board is connected to the output of octal buffer/line driver (U2) of a mated SNOW board. A collision occurs between the two buffers, where both buffers drive signals to each other. This causes unusual power consumption by the board and sporadic bit errors, pattern loss, loss of pointer, and other unusual error signals when two SNOW boards are connected together. Since SS28, SS29, SS30, and SS31 are not crucial to the reference design, they can be removed from the ring expansion interface by either removing the octal buffer/line driver (U2) or disabling the buffer (U2) by connecting either pin 1 or pin 19 to high. PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS' INTERNAL USE 2 RELEASED SNOW BOARD ERRATA PMC-980951 ISSUE 2 PM5342 SPECTRA-155 SONET/SDH NODE OPTICAL INTERFACE FOR WAN REFERENCE DESIGN (SNOW BOARD) ERRATA NOTES PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS' INTERNAL USE 3 RELEASED SNOW BOARD ERRATA PMC-980951 ISSUE 2 PM5342 SPECTRA-155 SONET/SDH NODE OPTICAL INTERFACE FOR WAN REFERENCE DESIGN (SNOW BOARD) ERRATA CONTACTING PMC-SIERRA, INC. PMC-Sierra, Inc. 105-8555 Baxter Place Burnaby, BC Canada V5A 4V7 Tel: Fax: (604) 415-6000 (604) 415-6200 document@pmc-sierra.com info@pmc-sierra.com apps@pmc-sierra.com (604) 415-4533 http://www.pmc-sierra.com Document Information: Corporate Information: Application Information: Web Site: None of the information contained in this document constitutes an express or implied warranty by PMC-Sierra, Inc. as to the sufficiency, fitness or suitability for a particular purpose of any such information or the fitness, or suitability for a particular purpose, merchantability, performance, compatibility with other parts or systems, of any of the products of PMC-Sierra, Inc., or any portion thereof, referred to in this document. PMC-Sierra, Inc. expressly disclaims all representations and warranties of any kind regarding the contents or use of the information, including, but not limited to, express and implied warranties of accuracy, completeness, merchantability, fitness for a particular use, or non-infringement. In no event will PMC-Sierra, Inc. be liable for any direct, indirect, special, incidental or consequential damages, including, but not limited to, lost profits, lost business or lost data resulting from any use of or reliance upon the information, whether or not PMC-Sierra, Inc. has been advised of the possibility of such damage. (c) 1999 PMC-Sierra, Inc. PMC-980951 (R2) Ref. PMC-970285 (R1) Issue date: March 1999 PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS' INTERNAL USE |
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