1998 Microchip Technology Inc. DS40143B/E1A-page 1
The PIC16C55X(A) (Rev. A) parts you received con-
form functionally to the PIC16C55X(A) preliminary data
sheet (DS40143B), e xcept for the anomalies described
below.
Module:
Reset
Description:
Power-up Timer stays enabled regardless of the
PWRTE setting (bit 3 of configuration word).
Workaround:
Clear reserved bit 6 of the configur ation w ord to 0
during programming. In the MPLAB™ program-
mer window , this bit is listed as Bro wn Out Detect.
This will allow PWRTE to function correctly.
FIGURE 7-1: CONFIGURATION WORD
CP1 CP0
1
CP1 CP0
1
CP1 CP0
1
Reserved CP1 CP0
1
PWRTE WDTE F0SC1 F0SC0
CONFIG Address
REGISTER: 2007h
bit13 bit0
bit 13-8
CP<1:0>:
Code protection bits
(1)
5-4:
11
= Code protection off
10
= Upper half of program memory code protected
01
= Upper 3/4th of program memory code protected
00
= All memory is code protected
bit 7:
Unimplemented
: Read as '1'
bit 6:
Reserved:
Do not use
bit 3:
PWRTE
: Power-up Timer Enable bit
1 = PWRT disabled
0 = PWRT enabled
bit 2:
WDTE
: Watchdog Timer Enable bit
1 = WDT enabled
0 = WDT disabled
bit 1-0:
FOSC1:FOSC0
: Oscillator Selection bits
11
= RC oscillator
10
= HS oscillator
01
= XT oscillator
00
= LP oscillator
Note 1:
All of the CP1:CP0 pairs hav e to be giv en the same value to enab le the code protection scheme listed.
Clarifications/Corrections to the Data Sheet:
The PIC16C55X(A) Data Sheet (DS40143B), Table 7-
2, calls out the incorrect crystals for the use with our
PICmicros™. The table updated below lists the stan-
dard parallel cut versions.
Errata Sheet for the PIC16C55X(A) Rev. A Data Sheet
PIC16C55X(A)
PIC16C55X(A)
DS40143B/E1A-page 2
1998 Microchip Technology Inc.
TABLE 7-2: CAPACITOR SELECTION FOR CRYSTAL OSCILLATOR (PRELIMINARY)
Mode Freq OSC1(C1) OSC2(C2)
LP 32 kHz
200 kHz 68 - 100 pF
15 - 30 pF 68 - 100 pF
15 - 30 pF
XT 100 kHz
2 MHz
4 MHz
68 - 150 pF
15 - 30 pF
15 - 30 pF
150 - 200 pF
15 - 30 pF
15 - 30 pF
HS 8 MHz
10 MHz
20 MHz
15 - 30 pF
15 - 30 pF
15 - 30 pF
15 - 30 pF
15 - 30 pF
15 - 30 pF
Higher capacitance increases the stability of the oscillator but also increases the start-up time. These values are f or design guidance
only. Rs may be required in HS mode as well as XT mode to avoid overdriving crystals with low drive level specification. Since each
crystal has its own characteristics, the user should consult the crystal manufacturer for appropriate values of external components.
Crystals to be Characterized:
32.768 kHz Epson C-001R32.768K-A
±
20 PPM
100 kHz Epson C-2 100.00 KC-P
±
20 PPM
200 kHz STD XTL 200.000 kHz
±
20 PPM
4.0 MHz ECS ECS-40-20-4
±
50 PPM
20.0 MHz ECS ECS-200-20-4
±
50 PPM
1998 Microchip Technology Inc. DS40143B/E1A-page 3
PIC16C55X(A)
2002 Microchip Technology Inc.
Information contained in this publication regarding device
applications and the like is intended through sug gestion 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 Incorporat ed with respect
to the accuracy or use of such inf orm ation, or inf ringement of
patents or other 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
rights.
Trademarks
The Microchip name and logo, the Microchip logo, FilterLab,
KEELOQ, microID, MPLAB, PIC, PICmicro, PICMASTER,
PICSTART, PRO MATE, SEEVAL and The Embedded Control
Solutions Company are registered trademarks of Microchip T ech-
nology Incorporated in the U.S.A. and other countries.
dsPIC, ECONOMONITOR, FanSense, FlexRO M, fuzzyLAB,
In-Circuit Serial Programming, ICSP, ICEPIC, microPort,
Migratable Memory, MPASM, MPLIB, MPLINK, MPSIM,
MXDEV, PICC, PICDEM, PICDEM.net, rfPIC, Select Mode
and Total Endurance are trademarks of Microchip Technology
Incorporated in the U.S.A.
Serialized Quick Turn Programming (SQTP) is a service mark
of Microchip Technology Incorpora ted 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
certification for its worldwide headquarters,
design and wafer fabrication facilities in
Chandler and Tempe, Arizona in July 1999. The
Company’s quality system processes and
procedures are QS-9000 compliant for its
PICmicro® 8-bit MCUs, KEELOQ® code ho pp in g
devices, Serial EEPROMs and microperipheral
products. In addition, Microchips quality
system for the design and manufacture of
development systems is ISO 9001 certified.
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.
2002 Microchip Technology Inc.
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