MCP79411 datasheet(54/60 Pages) MICROCHIP

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MCP79410/MCP79411/MCP79412

DS20002266E-page 54

 2010-2013 Microchip Technology Inc.

APPENDIX A: REVISION HISTORY

Revision A (10/2010)

Original release of this document.

Revision B (03/2011)

Minor typographical edits;

Added Appendix B: Device Errata

Revision C (07/2011)

Updated Section 4.2.6, Crystal Specs; Revised Figure

4-4.

Revision D (12/2011)

Added DC/AC Char. Charts

Revision E (04/2013)

Revised Features page; Revised Schematic, Block

Diagram; Added detailed descriptions for Registers.

Minor updates to the overall content.

APPENDIX B: DEVICE ERRATA

Devices with silicon revision prior to A4 (date code prior

to 11/10) have an errata where the AM/PM bit (Bit 5 in

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

7 in register 00h).

• The external CMOS source is stopped in

EXTOSC mode.

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.

MCP79411 Datasheet(PDF) 54 Page - Microchip Technology