AC164140 Microchip Technology, AC164140 Datasheet - Page 32

• Manufacturer Part Number: AC164140
• Description: MCP79410 RTCC PICtail Plus Daughter Board Memory Kits
• Manufacturer: Microchip Technology
• Series: PICtail™ Plusr

Specifications of AC164140

• Main Purpose: Timing, Real Time Clock (RTC)
• Embedded: -
• Utilized Ic / Part: MCP79410
• Primary Attributes: For Use With Explorer 16, PICDEM PIC18 Explorer, XLP DEV Board, PICkit Serial Analyzer
• Secondary Attributes: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

MCP7941X
APPENDIX A:
Revision A (10/2010)
Original release of this document.
Revision B (03/2011)
Minor typographical edits;
Added Appendix B: Device Errata
DS22266B-page 32
REVISION HISTORY
Preliminary
APPENDIX B:
Devices with silicon revision prior to A4 (date code prior
to 11/10) have an errata where the AM/PM bit (Bit 5 in
register 02h) may be flipped if the oscillator is stopped.
This is coincident with the OSCON bit getting cleared.
This can occur due to the following conditions:
• The oscillator is stopped on the application.
• The oscillator is stopped by clearing the ST bit (Bit
• The external CMOS source is stopped in
The work-around is to determine when the OSCON bit
is cleared and check in software for AM/PM bit corrup-
tion.
Devices with silicon revision A4 or later (date code after
11/09) do not have this issue.
7 in register 00h).
EXTOSC mode.
DEVICE ERRATA
 2011 Microchip Technology Inc.