i recently used a pcf8573 rtc with a pic. this one is a good solution for
battery buffering (needs single 1.2v nicd) as the core is running down to
a very low voltage.
it has a i2c interface.
with a separate rtc, you won't get problems when reseting the pic.
tino





Edson Brusque <ebrusque@TERRA.COM.BR>
Gesendet von: pic microcontroller discussion list <PICLIST@MITVMA.MIT.EDU>
16.01.02 23:25
Bitte antworten an pic microcontroller discussion list


        An:     PICLIST@MITVMA.MIT.EDU
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        Thema:  [PIC]: RTC


Hello,

    I think this was already covered here, but I've searched the archives
and found nothing interesting.

    The PIC is very precise for using one of the interrupts as an RTC?
Obviously, I mean a PIC in equipment that is always on.

    Or is it more recomendable to use an RTC-on-a-chip like the ones from
Dallas (DS1307)? What is the more common/cheap/simple RTC that uses I2C?

    Best regards,

    Brusque

-----------------------------------
Edson Brusque
Research and Development
C.I.Tronics Lighting Designers Ltda
Blumenau  -  SC  -  Brazil
www.citronics.com.br
-----------------------------------

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