I am designing a 8051 based system(89c51 is used). In the system I want to store a variable whose value will be changed time to time by the end user. I thought of going for external flash memory chip to store such variables. Which chip i have to use so that I can store and access these variables as if it is in external RAM.
storing variables in ROM How do you propose to stare valued in a Read Only Memory? 89c51 is totally non-descriptive, all derivatives are different, give the manufacturer and full type. If only a few variables many "internal" means exist if you choose the right processor. I thought of going for external flash memory chip to store such variables. most use a serial EEPROM for such. Which chip i have to use so that I can store and access these variables as if it is in external RAM a parallel flash Erik
"Which chip i have to use so that I can store and access these variables as if it is in external RAM" "a parallel flash" It doesn't have to be parallel! See: http://www.keil.com/forum/docs/thread6729.asp