Driving a DS1393 from a PIC or AVR

[Mike Deblis]

Hi,

Has anyone tried talking to a DS1393 or similar 3-wire RTC from either
a PIC or AVR (or similar) - these RTCs are not SPI - they have a
bi-directional I/O pin.

Thanks,

Mike

 

[Anthony Fremont]

"Mike Deblis" <mdeblis@hotmail.com> wrote in message
news:bc45f679.0412080157.6676b4cd@posting.google.com...

Hi,

Has anyone tried talking to a DS1393 or similar 3-wire RTC from either
a PIC or AVR (or similar) - these RTCs are not SPI - they have a
bi-directional I/O pin.

Isn't it really just I2C protocol with a chip select as the "third"
wire?

 

[Roger Hamlett]

"Anthony Fremont" <spam@anywhere.com> wrote in message
news:ULAtd.5204$0b3.3370@fe2.texas.rr.com...

"Mike Deblis" <mdeblis@hotmail.com> wrote in message
news:bc45f679.0412080157.6676b4cd@posting.google.com...
Hi,

Has anyone tried talking to a DS1393 or similar 3-wire RTC from either
a PIC or AVR (or similar) - these RTCs are not SPI - they have a
bi-directional I/O pin.

Isn't it really just I2C protocol with a chip select as the "third"
wire?
I'd be very 'wary' about chosing this chip, since it is no longer listed

by Dallas/Maxim, with the data sheet 'links', going to a blank page...

Best Wishes