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I2c pcf8574-Ds1307--

Question asked by debruyne.marc on Feb 20, 2013
Latest reply on Feb 21, 2013 by Andrew Neil

after long trying, i managed to write to the pcf8574
in assembly language.
no i have only a problem with WRITING to the DS1307, i can read the DS1307
my question is, when you use a crystal of 14.7456Mhz, what are the correct settings in the freq ,and ccrl registers, because i have connect the DS1307 to the AARDVARK and i can write and read.
are there special precautions for write to a DS1307

many thanks

marc debruyne