i want c programme code to acess a real time clock using a microcontroller(hitachi h8 3644 microcontroller)?

Question

i have to display the time from the real time clock in to a lcd display board using this microcontroller(hitachi h8 3644).i need the software code for this and hardware specifications for it.

Answer 1

It depends on the interface to the real time clock. It could be I2C, SPI, or SRAM interface. Look on the hitachi website and see if they have code for the interface required, and then just set up a timer interrupt and read the RTC every .5 second or so.

Answer 2

Try this link:

http://documentation.renesas.com/eng/products/mpumcu/e602087_h83644.pdf

Check out on page 242 that described Timer X that should do the trick for you.