External memory interfacing with 8051

[vinothksr08]

hello,

I have to store my program in external memory and run from that(even i have internal program memory). am using at89c51, keil c compiler, can anybody give some idea.?

 

[talhaelex]

you can use "MOVX" instruction to store ur code in external mem ,BUT with "movx" instruction you'll ave to use DPTR or P0 as pointer..
eg : MOVX @DPTR,A ;

 

[jayanth.devarayanadurga]

https://www.edaboard.com/threads/287063/
https://www.edaboard.com/threads/288125/

 

[vinothksr08]

thank you jayanth,

i got idea about interfacing external memory. like wise how to interface SRAM & DRAM with 8051. and how to write to & read from that? and also could you explain the function of 74LS373 in that circuit?