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DSA Maxim Integrated Real Time Clock datasheet, inventory, & pricing. RAM Clear Function (DS, DSA, and. DS12CA) Pin Configurations and Ordering Information appear at end of data sheet. WWW. The DS real-time clock (RTC) plus RAM is designed to be a direct The DS is identical in form, fit, and function to the DS, and has an.

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Serves me right for not doing the research before hand and buying essentially near dead RTCs. Originally Posted by lowen.

One is that the system may attempt to access the wrong partition on the clock. Multiple revisions of any device. Hopefully they aren’t rebadged old ones. The RCLR pin is used to clear set to logic 1 all So yay for Jameco selling old dead stuff.

DS12887A PDF Datasheet浏览和下载

If so, on what pins? Selectable between Motorola and Ds12887x bus. Pin compatible with the MCB and. Surely the thing would be supplying some sort of voltage to the motherboard for it to retain it’s settings in BIOS?


Bookmarks Bookmarks Digg del. I may still complain to them about it dataeheet. It’s not much, maybe only a few bytes or so, but that does allow it to store some basic configuration data. Multiplex bus for pin efficiency.

Pins 2, 3, 16, 20, and 22 are missing by design. Periodic rates from m s to ms.

Dallas Semiconductor DsA datasheet & applicatoin notes – Datasheet Archive

Coin cell battery seems like the way to go. I didn’t know until reading this post that there was a replacement. Final note of significance is that replacing the clock is not a guarantee that the board will now boot, for two reasons: Clear cmos jumper not shorted?

AD6 during the address portion of an access cycle. All times are GMT As far as i know, the only way to check for a dead battery is to literally cut it open The other is that some BIOS expect the clock to be partially configured before installation, and only the manufacturer knows what that configuration would be. I have been trying to solve this problem with a ‘ VLB board, but had thought the DS was no longer available.


These are new, not ‘new-old-stock’ ones. App notes from Maxim, datedhttp: Totally nonvolatile with over 10 years of.

Access to this additional RAM space is determined by the logic level presented on. I tossed the original since the previous owner had chopped the hell out of it trying to add a battery to it, and I am pretty sure that was what was causing all manner of odd behaviour.

I may be in the last category, but more research is required to find out for sure.

DSA (MAXIM) PDF技术资料下载 DSA 供应信息 IC Datasheet 数据表 (9/22 页)

Some revisions of this device may incorporate deviations from published specifications known as errata. This device cannot be stored or shipped in conductive material that will give a continuity. So I guess I’ll need to jump on ebay and buy a N. Mouser, here we come Bus-compatible interrupt signals IRQ.

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