HCS512 HCS512 Data Sheet Errata The HCS512 Rev. D parts you have received conform functionally to the Device Data Sheet (DS40151D), except for the anomalies described below. All the problems listed here will be addressed in future revisions of the HCS512 silicon. Problems: None 2002 Microchip Technology Inc. DS80124B-page 1 HCS512 Clarifications/Corrections to the Data Sheet: In the Device Data Sheet (DS40151D), the following clarifications and corrections should be noted. 1. Features: Description Page 2 of DS40151D, 1st paragraph, 2nd sentence reads: 3.0 volts to 6.0 volts It should read: 4.0 volts to 6.0 volts 2. Features: Electrical Characteristics for HCS512 Page 16 of DS40151D, Table 9-2 AC Characteristics, Symbol TE conditions reads: Note: The upper 12 bits of the SourceH are always the upper 12 bits of a 28-bit serial number. If a 32-bit serial number is used, the Most Significant nibble is ignored (see example). Example: Seed = xxxDEF98765432116 28-bit Serial Number: 123456716 SourceH = 123DEF916 SourceL = 8765432116 32-bit Serial Number: 7438901216 SourceH = 438DEF916 SourceL = 8765432116 3V < VDD < 6V Oscillator components tolerance <10% The conditions should read: 4.0V < VDD <6V Oscillator components tolerance <10% 3. Features: Normal Learning (Serial Number Derived) Page 12 of DS40151D, Section 7.1 reads: For 28-bit serial number encoders (66/67-bit transmissions): SourceH = 6H + 28 bit Serial Number SourceL = 2H + 28 bit Serial Number The text should read: For 28-bit serial number encoders (66/67-bit transmissions): SourceH = 616 + 28 bit Serial Number SourceL = 616 + 28 bit Serial Number 4. Features: Secure Learning (Seed Derived) Page 12 of DS40151, Section 7.2 reads: For 60-bit seed encoders: SourceH = Seed Upper 28 bits (with upper 4 bits always zero) SourceL = Seed Lower 32 bits The text should read: For 60-bit seed encoders: SourceH = Seed Upper 28 bits SourceL = Seed Lower 32 bits DS80124B-page 2 2002 Microchip Technology Inc. HCS512 APPENDIX A: REVISION HISTORY Rev A Document (2/2002) Under Clarifications/Corrections to the Data Sheet, corrections have been made to the following: Section 7.1 - Normal Learning (Serial Number Derived), page 12 Section 7.2 - Secure Learning (Seed Derived), page 12 Rev B Document (10/2002) Under Clarifications/Corrections to the Data Sheet, corrections have been made to the following: Features - Description, page 2 Table 9-2 - AC Characteristics, page 16 2002 Microchip Technology Inc. DS80124B-page 3 HCS512 NOTES: DS80124B-page 4 2002 Microchip Technology Inc. Note the following details of the code protection feature on PICmicro(R) MCUs. * * * * * * The PICmicro family meets the specifications contained in the Microchip Data Sheet. Microchip believes that its family of PICmicro microcontrollers is one of the most secure products of its kind on the market today, when used in the intended manner and under normal conditions. There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our knowledge, require using the PICmicro microcontroller in a manner outside the operating specifications contained in the data sheet. The person doing so may be engaged in theft of intellectual property. Microchip is willing to work with the customer who is concerned about the integrity of their code. Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not mean that we are guaranteeing the product as "unbreakable". Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our product. If you have any further questions about this matter, please contact the local sales office nearest to you. Information contained in this publication regarding device applications and the like is intended through suggestion only and may be superseded by updates. It is your responsibility to ensure that your application meets with your specifications. No representation or warranty is given and no liability is assumed by Microchip Technology Incorporated with respect to the accuracy or use of such information, or infringement of patents or other intellectual property rights arising from such use or otherwise. Use of Microchip's products as critical components in life support systems is not authorized except with express written approval by Microchip. No licenses are conveyed, implicitly or otherwise, under any intellectual property rights. Trademarks The Microchip name and logo, the Microchip logo, KEELOQ, MPLAB, PIC, PICmicro, PICSTART and PRO MATE are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. FilterLab, microID, MXDEV, MXLAB, PICMASTER, SEEVAL and The Embedded Control Solutions Company are registered trademarks of Microchip Technology Incorporated in the U.S.A. dsPIC, dsPICDEM.net, ECONOMONITOR, FanSense, FlexROM, fuzzyLAB, In-Circuit Serial Programming, ICSP, ICEPIC, microPort, Migratable Memory, MPASM, MPLIB, MPLINK, MPSIM, PICC, PICDEM, PICDEM.net, rfPIC, Select Mode and Total Endurance are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. Serialized Quick Turn Programming (SQTP) is a service mark of Microchip Technology Incorporated in the U.S.A. All other trademarks mentioned herein are property of their respective companies. (c) 2002, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved. Printed on recycled paper. Microchip received QS-9000 quality system certification for its worldwide headquarters, design and wafer fabrication facilities in Chandler and Tempe, Arizona in July 1999 and Mountain View, California in March 2002. The Company's quality system processes and procedures are QS-9000 compliant for its PICmicro(R) 8-bit MCUs, KEELOQ(R) code hopping devices, Serial EEPROMs, microperipherals, non-volatile memory and analog products. In addition, Microchip's quality system for the design and manufacture of development systems is ISO 9001 certified. 2002 Microchip Technology Inc. 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