Implementing the External Memory Interface on PIC18C601/801 Appication Note
The PIC18C601 and PIC18C801 are the very first members of Microchip?s PIC18 family that are ROMless microcontrollers ? that is, they have no on-chip program memory. Both offer the enhanced PIC18 architecture, along with the ability to use different types and sizes of external program memory to exactly fit any application. In addition to standard 1.5 Kbytes of general purpose RAM, the PIC18C601 can address up to 256 Kbytes of external program memory, while the PIC18C801 can address up to 2 Mbytes of external program memory. With this amount of available addressable space, the PIC18C601/801 devices become ideal candidates for more complex applications (e.g. TCP/IP stacks), developed with high level programming languages, such as ?C?.
Linear Program Memory, PIC18C601/801, ROMless