can a AT89C51 be used as a rom?

[777xxx]

so i can connect it to an external cpu and run code off it? ive looked on google and cant find any definitive answers. i know it uses flash ram but if i only want to read from it, would this be a problem? and if so, where would i connect the address and data lines? any help would be appreciated.

 

[Papabravo]

You can't tell it what address you want to get data from so there would be no way to get data from the particular address you want.

 

[Nigel Goodwin]

Assuming you've got enough I/O lines available, you could program a micro-controller to work as a crude and very slow ROM, but it seems a pretty pointless thing to do.