HCS512/SO - Microchip Technology

 2002 Microchip Technology Inc. DS80124B-page 1

HCS512

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

HCS512 Data Sheet Errata

HCS512

DS80124B-page 2  2002 Microchip Technology Inc.

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:

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 trans-

missions):

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 trans-

missions):

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

Example:

Seed = xxxDEF98765432116

28-bit Serial Number: 123456716

SourceH = 123DEF916

SourceL = 8765432116

32-bit Serial Number: 7438901216

SourceH = 438DEF916

SourceL = 8765432116

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).

 2002 Microchip Technology Inc. DS80124B-page 3

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

HCS512

DS80124B-page 4  2002 Microchip Technology Inc.

NOTES:

 2002 Microchip Technology Inc. DS80124B - page 5

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

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veyed, implicitly or otherwise, under any intellectual property

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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

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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® 8-bit MCUs, KEELOQ® code hopping

devices, Serial EEPROMs, microperipherals,

non-volatile memory and analog products. In

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Note the following details of the code protection feature on PICmicro® 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 knowl-

edge, 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.

DS00000A-page 6  2002 Microchip Technology Inc.

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