Patent ID: 6691219
Filing Date: 2004-02-10
Classification: G06F

Abstract:
An 8-bit microcontroller having extended addressing capability, comprising:an address control special function register capable of being set to one of three address modes, a first address mode being a 16-bit address mode, a second address mode being a 24 bit paged address mode and a third address mode being a 24-bit contiguous address mode; at least one internal memory ; a program counter having three bytes; a 24 bit address bus for accessing said at least one internal memory in any of said three address modes and an address page special function register being manually written to prior to execution of an instruction, wherein the contents of said address page special function register are loaded into an upper byte of said three bytes of said program counter prior to execution of the instruction, said upper byte pointing to a page of said at least one internal memory.