ds12887 interfacing with at89c51

hi,
i'm doing a project to display the temperature using lm35,adc0804 on an lcd.
now i also want to display the time on the second line of lcd using ds12887(or any other rtc),i would like to know how to interface it since it is considered as external memory. rest of my code is in C.
thank u.

can anyone provide links for real time clock interfacing to 89c51 microcontroller?

i did many clocks using 8051 :mu:Cs.. well you simple start with an arbitrary delay, let the watch run for a hour or tow, claculate the error, and adjust your delay in the code.. i did it 3 times before my clock was working perfectly.

note, the higher the value of the crystal you'r using, the better precision you'll get...

i have a C code, where i use those those software delays... (but it's messy! do you still want it? )

as far as i am learning, to perform RealTime as it is sayed in the books, you'll have to program it is asm, and calculate the time it takes to execute every single instructions.. (maybe Kyle can do that?)

instead of using a software delay i would want to use a real time clock.so i would like to know about interfacing ds12887 to at89c51.