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| PRELIMINARY S/UNI-622-MAX ERRATA PMC-990340 ISSUE 2 PM5356 S/UNI-622-MAX S/UNI-622-MAX REFERENCE DESIGN ERRATA PM5356 S/UNI-622-MAX SATURN USER NETWORK INTERFACE (622-MAX) REFERENCE DESIGN ERRATA PRELIMINARY ISSUE 2: APRIL 1999 PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS' INTERNAL USE PRELIMINARY S/UNI-622-MAX ERRATA PMC-990340 ISSUE 2 PM5356 S/UNI-622-MAX S/UNI-622-MAX REFERENCE DESIGN ERRATA PUBLIC REVISION HISTORY Issue No. 1 2 Issue Date March 1999 April 1999 Details of Change Document created. Correct Optics module part number PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS' INTERNAL USE PRELIMINARY S/UNI-622-MAX ERRATA PMC-990340 ISSUE 2 PM5356 S/UNI-622-MAX S/UNI-622-MAX REFERENCE DESIGN ERRATA CONTENTS 1 2 ISSUE 2 ERRATA .................................................................................... 1 S/UNI-622-MAX REFERENCE DESIGN SCHEMATIC ERRORS ........... 2 2.1 2.2 2.3 3 MISSED ANALOG POWER FILTERING....................................... 2 INCORRECT PULLUP/PULLDOWN RESISTORS ....................... 2 INCORRECTLY REFERENCED OPTICS MODULE..................... 2 ADDITIONAL DESIGN NOTES................................................................ 3 3.1 3.2 PECL INTERFACING ISSUES...................................................... 3 JTAG PORT .................................................................................. 3 PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS' INTERNAL USE i PRELIMINARY S/UNI-622-MAX ERRATA PMC-990340 ISSUE 2 PM5356 S/UNI-622-MAX S/UNI-622-MAX REFERENCE DESIGN ERRATA LIST OF FIGURES FIGURE 1 - FILTERING FOR AVD<19>............................................................ 2 PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS' INTERNAL USE ii PRELIMINARY S/UNI-622-MAX ERRATA PMC-990340 ISSUE 2 PM5356 S/UNI-622-MAX S/UNI-622-MAX REFERENCE DESIGN ERRATA 1 ISSUE 2 ERRATA This issue 2 document errata contains errata applied to document PMC-981407 S/UNI-622-MAX Reference Design Issue 1. PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS' INTERNAL USE 1 PRELIMINARY S/UNI-622-MAX ERRATA PMC-990340 ISSUE 2 PM5356 S/UNI-622-MAX S/UNI-622-MAX REFERENCE DESIGN ERRATA 2 S/UNI-622-MAX REFERENCE DESIGN SCHEMATIC ERRORS This section describes errors and required corrections on the schematics provided with the S/UNI-622-MAX Reference Design. 2.1 Missed Analog Power Filtering On Page 3 of the S/UNI-622-MAX Reference Design schematics, Pin 19 of AVD<31..0> is tied directly to the output of the linear voltage regulator (U4). This pin should be filtered with the circuit shown below. Without this filtering, jitter performance of the device will be degraded. Figure 1 - Filtering for AVD<19> 1.0 From output of linear regulator U4 2.2 AVD<19> 4.7uF 0.1uF Incorrect Pullup/Pulldown Resistors On Page 2 of the S/UNI-622-MAX Reference Design schematics, pins RRCLK+ and RRCLK- (or RRCLKP and RRCLKN respectively) are both pulled down to ground using 4.7 KOhm resistors. RRCLK+ should be tied to the opposite polarity as pin RRCLK-, e.g. since RRCLK- is tied to ground, RRCLK+ should be tied to 3.3V. When tying an input to ground, the pin may be connected directly to ground. When tying an input to 3.3V or 5V, a 4.7 KOhm resistor should be used in order to prevent latchup during power up. Failure to tie RRCLK+ and RRCLKto complementary values will result in signal contention within the device witch may cause problems with device operation. 2.3 Incorrectly Referenced Optics Module The optics modules HFBR-5208 and HFCT-5208 should be correctly referenced as HFBR-5208M and HFCT-5208M. PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS' INTERNAL USE 2 PRELIMINARY S/UNI-622-MAX ERRATA PMC-990340 ISSUE 2 PM5356 S/UNI-622-MAX S/UNI-622-MAX REFERENCE DESIGN ERRATA 3 ADDITIONAL DESIGN NOTES This section provides additional recommendations on designing with the S/UNI622-MAX device. 3.1 PECL Interfacing Issues All unused differential PECL inputs should be tied such that the positive input and negative input are complementary (have opposite logic values). For example; RRCLK+ is tied to 3.3V, therefore RRCLK- should be tied to ground. Or; RRCLK+ is tied to ground and RRCLK- should be tied to 3.3V. The PECLV and PBIAS pins affect both the optical PECL interface as well as the REFCLK+/- interface. Therefore REFCLK+/- must have the same signal reference level as the optical PECL interface. Traces between the optics and the S/UNI-622-MAX should be limited to a maximum of 4 cm long. No vias should be present on the traces except where required for termination components. Any vias present on the traces will degrade jitter performance. Traces should be equal length with as few bends as possible. Pages 8 and 9 of the S/UNI-622-MAX Reference design describe the optional use of optics with integrated clock and data recovery (HFBR/HFCT-5207). It should also be noted that, for HFBR/HFCT-5207 devices, the SD signal should be terminated using a 10 KOhm resistor to ground rather than the 330 Ohm specified in Figure 2 of the S/UNI-622-MAX Reference design. 3.2 JTAG Port When unused, the JTAG port of the S/UNI-622-MAX should have TRSTB tied to RSTB. This will reset the JTAG port on reset of the system. TMS, TCK and TDI should be tied high. In addition, TMS may be tied high and TCK tied to a free running clock to ensure that the JTAG port logic is continuously put back into the correct state. PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS' INTERNAL USE 3 PRELIMINARY S/UNI-622-MAX ERRATA PMC-990340 ISSUE 2 PM5356 S/UNI-622-MAX S/UNI-622-MAX REFERENCE DESIGN ERRATA NOTES PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS' INTERNAL USE 4 PRELIMINARY S/UNI-622-MAX ERRATA PMC-990340 ISSUE 2 PM5356 S/UNI-622-MAX S/UNI-622-MAX REFERENCE DESIGN 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-990340 (P2) Issue date: April 1999 PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS' INTERNAL USE |
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