Some external RTC devices have a few bytes of extra RAM that can be used as a small non-volatile storage. Does the LPC1768 have such spare RAM storage available?

Doug

Yes Doug, If you would simply read the datasheet you would see that the LPC1768 does have 20 bytes of battery-backed up RAM.

Doug

Is there a demo/sample program on using the extra RAM of the RTC?

Hi Sunish

Hope this post here helps.

Regards
Daniel

Thanks for the tip, Daniel. Will a unix timestamp variable fit in a 32bit variable ?

Sunish

A traditional unix timestamp w/ 1 second resolution will fit in a 32 bit variable, until the year 2038, IIRC.

Thanks, looks like its working, what I wanted was to assign the clock value to battery backed RAM.

Sunish

You could also use the traditional time-related rtc registers, IIRC they are battery-backed even if rtc clock is not running (via the 32khz oscilator) while main power is off. If this fits your application, you'll still have the extra registers available for other purposes, if applicable,

I'm already using it and looks like its working.