Steve,excuse me if i start a new thread about my problem
I guess it can be useful for all who want to start working
on a new chip,But they meet confusing problems!
After a long time discussion with the company i finally accept the project,I have datasheet of the chip now,and I am sure i
can achieve all internal peripheral devices of this chip
there is just a Problem :
Having a common language between External Host controller (Me) and this Chip,There is only one timing diagram about Write and
read sequence according to the figures,
I put some pictures from the datasheet here


In the other Phrase my problem is here
How can i send 2500H in to C400H?
I was wishing the datasheet told me this:

set HI/Lo,Send High Byte of Address,clr HI/Lo,Send Low Byte of Address
then
set HI/Lo,Send High Byte of data,clr HI/Lo,Send Low Byte of Data

Did I miss anything in datasheet,I searched all over the datasheet for my question but i can't find it!
Datasheet: http://www.8052.com/users/MEHDI/D36569C.pdf