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)
Information cont ai ned in this publi cation reg ardi ng device app l icat i ons and the like is i nte nded for sugge sti on onl y and may be superseded by u pdat es. 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 infringeme nt of patents or othe r intellec tual property ri ghts arising from such use or otherwis e. Use of Microchi p’s produc ts
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logo and name are registered trade ma rks of Microchip Technology Inc . in the U.S.A. and other countries. Al l rig hts reserved. All other tradem arks mentione d herein are the proper ty of thei r respective companies.
1999 Microchip Technology Inc.
All rights reserved. © 1999 Microchip Technology Incorporated. Printed in the USA. 11/99 Printed on recycled paper.
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