Hi Michael,

I think there is no problem with passage of time
between write and read because,before memorise data,
I stop the RTC(TR0=0) ,memorise data and then TR0=1.
I believe that my problem could be that in my RTC
I use variables like SUBSECONDS,SECONDS,MINUTES,
HOURS which I memorise them in at24c01 and if my
routine for reading is wrong,using the same names
when read the memory ,they are up-dated with momen-
-tary values from RTC!Is that possible?
By the way,do you believe this routine it's cor-
-rect:
unsigned char i2c_read(void)
{
unsigned char index,input_data;
index=SDATA;
input_data=0x00;
for(index=0;index<8;index++)
{
input_data<<=1;
SCLK=HIGH;
input_data |=SDATA;
SCLK=LOW;
}
return input_data;
}
Thank you,
Stefan