2002 Microchip Technology Inc. DS80102B-page 1
The PIC16C54C/55A/56A/57C/58B (Rev. A Silicon
ONLY) part s you have rec eive d conform functi onally to
the PIC16C5X Dev ice Data Sheet (DS30 453D), exce pt
for the anomalies described below.
All the problems list ed here will be addressed in future
revisions of the PIC 16C54C/55A/56A/57C/58B silicon.
1. Module: RESET
The minimum specification for the MCLR must be met
in order to RESET the PIC16C54C/55A/56A/57C/58B.
If a MCLR pulse occurs that is less than the minimum
specification (parameter #30), improper device opera-
tion can occur.
If the minimum specification cannot be met, then an
external circuit must be used to ensure that any pulse
width, less than the specif ication, will be filtered before
it reache s the MCLR pin.
Work around
A possible circuit is shown in Figure 1. Proper design
validation needs to be done to ensure desired opera-
tion over the applications operating conditions.
4.7KW < R1 < 10KW
0.0µ1F C1 0.1µF
R2 = 100
Note: As with any windowed EPROM device, please cover the window at all times, except when erasing.
PI C16C 54C/55A/56A/57C/5 8B ( Rev. A Silicon) E rrata S heet
DS80102B-page 2 2002 Microchip Technology Inc.
Clarifications/Corrections to the Data
In the Device Data Sheet (DS30453D), the following
clarifi c ations and correcti ons should be noted.
2002 Microchip Technology Inc. DS80102B-page 3
Rev A Document (3/2001)
First revi sion of this document.
Rev B Document (3/2002)
Removed Device Data Sheet anomalies which were
corrected in new revision DS30453D.
DS80102B-page 4 2002 Microchip Technology Inc.
2002 Microchip Technology Inc. DS80102B - 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and may be superseded by updates.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 Microc hip Technology Incorporated with respect
to the accuracy or use of such inform ation, or infringement of
patents or oth er intellectual property rights arising from such
use or otherwise. Use of Microchip’s products as critical com-
ponents in life support systems is not authorized except with
express written approval by Microchip. No licenses are con-
veyed, implicitly or otherwise, under any intellectual property
The Microchip name and logo, the Microchip logo, FilterLab,
PICSTART, PRO MATE, SEEVAL and The Embedded Control
Solut ions Com pany ar e regis tered tr ademarks of Microch ip Tech -
nology Incorporated in the U.S.A. and other countries.
dsPIC, ECONOMONITOR, FanSense, FlexROM, fuzzyLAB,
In-Circuit Serial Programming, ICSP, ICEPIC, microPort,
Migratable Memory, MPASM, MPLIB, MPLINK, MPSIM,
and Total Endurance are trademarks of Microchip Technology
Incorporate d in the U.S.A.
Serialized Quick T urn 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.
© 2002, Microchip Technology Incorporated, Printed in the
U.S.A., All Rights Reserved.
Printed on recycled paper.
Microchip received QS-9000 quality system
certific at ion for i ts worldwid e headquart ers,
design and wafer fabrication facilities in
Chandler and T empe, Arizona in July 1999. The
Company’s quality system processes and
procedures are QS-9000 compliant for its
8-bit MCUs, KEELOQ
cod e ho pp in g
devices, Serial EEPROMs and microperipheral
products. In addition, Microchip’s quality
system for the design and manufacture of
development systems is ISO 9001 certified.
Note the following details of the code protection feature on PICm icro® 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 a s “unbreakable”.
Code protection is constant ly evolving. We at Microchip are committed to continuously i mproving 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.
DS80102B-page 6 2002 Microchip Technology Inc.
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