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Real time clock — Parallax Forums

Real time clock

PFloyd36069PFloyd36069 Posts: 135
edited 2008-04-06 23:25 in BASIC Stamp
Hi,

I have a Dallas DS1287A real time clock and i was wondering if i could read it with my BS2. I cant really find any info on how it outputs the time. Any help would be appreciated.

Thanks,
Bryan

Comments

  • PJAllenPJAllen Banned Posts: 5,065
    edited 2008-04-06 23:08
    Discontinued device, really old; battery's probably dead, anyway.
  • Mike GreenMike Green Posts: 23,101
    edited 2008-04-06 23:12
    This is a parallel bus RTC designed for use in a PC. It requires 12-14 I/O pins to use it which would use up most of your I/O pins on a BS2. You can add additional external logic to handle the I/O pins, but it would be easier to use a RTC designed to use an SPI or I2C interface. Have a look through the Nuts and Volts columns on the Parallax website. There are several columns that discuss I/O expanders and several columns on RTCs.

    You will need the datasheets if you want to use it. Start with a websearch on the part number. Dallas Semiconductor has copies of all their datasheets on their website that you can download. Check there.
  • PJAllenPJAllen Banned Posts: 5,065
    edited 2008-04-06 23:15
    If you're bound & determined to engage in a futile exercise, it'll read and·write like the device in the attached datasheet.

    Post Edit -- Let it go, let it go.

    Datasheet removed by PJA 04/09/08

    Post Edited (PJ Allen) : 4/10/2008 1:27:48 AM GMT
  • PJAllenPJAllen Banned Posts: 5,065
    edited 2008-04-06 23:25
    Here's more on flogging a dead horse; no guess work·at all, this time·(attached.)

    Datasheet removed by PJA 04/09/08 (PM me if you need it.)

    Post Edited (PJ Allen) : 4/10/2008 1:28:41 AM GMT
    pdf
    pdf
    DS1287.pdf
    1M
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