Hi all,
I have never played with I2C or real time clocks before.  I found a chip, 
DS1388, on the Maxim website that I wanted to try.  It has an I2C interface 
and battery backup with trickle charge.  The problem is I can't seem to buy 
it anywhere, not even from the Maxim website.  I found the DS1302 which 
looks like it would fill the bill but it uses the C3, serial clock line of 
the PIC chip.  I'm not sure if this is ok or will I have problems with the 
I2C devices in the circuit that are connected to the same line?  Thanks for 
any help.
FJ


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