Abstract: Nonvolatile Y2K-compliant real-time clocks (RTCs) with battery-backed SRAM and watchdog timer provide time and date functions to microcontrollers, such as the 8051 industry standard architecture. This application note highlights an example program featuring RTCs such as a DS1556 when used with a DS5000 microcontroller. A reference design schematic is included in this application note. The application note you have requested is available in Acrobat PDF format: APPLICATION NOTE 520: Using a Watchdog Timekeeping RAM with a Microcontroller (PDF, 249kB) A free Acrobat PDF reader is available from: http://www.adobe.com/products/acrobat/readstep.html Related Parts   APP 520: May 02, 2003 DS1553 64kB, Nonvolatile, Year-2000-Compliant Timekeeping RAM Full Data Sheet (PDF, 460kB) Free Samples DS1554 256k Nonvolatile, Y2K-Compliant Timekeeping RAM Full Data Sheet (PDF, 376kB) Free Samples DS1556 1M, Nonvolatile, Y2K-Compliant Timekeeping RAM Full Data Sheet (PDF, 388kB) Free Samples DS1557 4Meg, Nonvolatile, Y2K-Compliant Timekeeping RAM Full Data Sheet (PDF, 336kB) Free Samples Automatic Updates Would you like to be automatically notified when new application notes are published in your areas of interest? Sign up for EE-Mail™. We Want Your Feedback!   Download, PDF Format (249kB)  AN520, AN 520, APP520, Appnote520, Appnote 520