I use ATMELL 89C51RD2 I want to use external RAM because internal RAM is only 1kB. How can I do this?
What does the Data Sheet say? Note that you can access the Datasheet, Application Notes & example code via the Device Database on this site!
At http://www.8052.com/links.phtml under "intersting sites" you will find links to chapters 1 and 3 of the '51 "bible". Chapter 2 is the programmers reference. chs 1 and 3 will tell you what you need to know, such info is these days considered "common knowledge" and is thus not in the data sheets any more. Erik
Danke lieber Freunde!! Gruss dich!