Hi,

Check your time settings that is it is 12 hr or 24 hrs.
It will shows the time 00:00:00 at 12:0:0 .

On Wed, Jun 3, 2009 at 8:22 AM, tayyaba_ch wrote:
> Hi
> i am working with LPC 2368 and using 32k external crystal for RTC and cell
> as
> RTC power supply.
> RTC is working fine, i can set and read RTC successfully, but some times it
> resets to 0(hour,minutes,seconds,day,week,month,year) randomly and by
> setting
> again its value it works properly.
>
> Regards

--
Thanks & Regards,
Chetna N.Kharkar

An Engineer's Guide to the LPC2100 Series

--- In l..., "tayyaba_ch" wrote:
>
> Hi
> i am working with LPC 2368 and using 32k external crystal for RTC and cell as
> RTC power supply.
> RTC is working fine, i can set and read RTC successfully, but some times it
> resets to 0(hour,minutes,seconds,day,week,month,year) randomly and by setting
> again its value it works properly.
> Regards
>

So, do you have a question ?

Sounds like a hardware problem.
What is the rest of the software doing ?
Did you write the code yourself ?

When you power down the system, does the battery (cell) also power down ?

don

Hi:
There could be several reasons why the RTC resets:

1. MCU Reset: have you check that the RTC reset doesn't coincide with a full MCU reset?

2. It could be possible that you're overwritting the RTC Timer Counter registers with 0. Maybe a rogue pointer?

3. Or resetting the RTC (see CCR register)?

Regards,

Alex

--- In l..., "tayyaba_ch" wrote:
>
> Hi
> i am working with LPC 2368 and using 32k external crystal for RTC and cell as RTC power supply.
> RTC is working fine, i can set and read RTC successfully, but some times it resets to 0(hour,minutes,seconds,day,week,month,year) randomly and by setting again its value it works properly.
> Regards
>

Hi
i am working with LPC 2368 and using 32k external crystal for RTC and cell as
RTC power supply.
RTC is working fine, i can set and read RTC successfully, but some times it
resets to 0(hour,minutes,seconds,day,week,month,year) randomly and by setting
again its value it works properly.
Regards

Hi
i am working with LPC 2368 and using 32k external crystal for RTC and cell as RTC power supply.
RTC is working fine, i can set and read RTC successfully, but some times it resets to 0(hour,minutes,seconds,day,week,month,year) randomly and by setting again its value it works properly.
Regards