Dallas RTC 1305 and interrupts

Hello All,
I started a project which uses a PIC16F876 and a RTC DS1305 from Dallas.
There is no problem to read and write the registers. My only problem is the
interruption . I connected the INT0 for the RTC to the RB0 pin of the PIC (I
used a 5k pull-up resitor). I configured correctly (I think ) the registers
to activate a interrupt every second . When I test my program, it appears
that the INT0 goes low once. No matter what I try, the signal does not go
high again in order to give the next interruption. By the way , the
datasheet is not very clear (to me) what I have to do to let the signal go
high. Your help  is welcome.
Thanks for reading, Georges.

On Sat, 11 Sep 2004 09:50:40 +0200, "Georges Konstantinidis"
<georges_konstantinidis@hotmail.com> wrote:

>Hello All,
>I started a project which uses a PIC16F876 and a RTC DS1305 from Dallas.
>There is no problem to read and write the registers. My only problem is the
>interruption . I connected the INT0 for the RTC to the RB0 pin of the PIC (I
>used a 5k pull-up resitor). I configured correctly (I think ) the registers
>to activate a interrupt every second . When I test my program, it appears
>that the INT0 goes low once. No matter what I try, the signal does not go
>high again in order to give the next interruption. By the way , the
>datasheet is not very clear (to me) what I have to do to let the signal go
>high. Your help  is welcome.


The first thing to try is to read any available status bits from the
DS1305. If this does not clear the interrupt, then writing to the
specific status bit should clear the interrupt status.  The above is
just generic suggestions - I have not gone through the DS1305 
datasheet for a more specific suggestion.

Regards
   Anton Erasmus