The present invention is a method and apparatus for increasing the memory read/write speed with special function registers (SFRs). This method comprises the steps of: (1) connecting additional external memory to the processor as expanded memory, (2) mapping the address of expanded memory to the unused...http://www.google.com.tw/patents/US6877062?utm_source=gb-gplus-share專利 US6877062 - Method and apparatus for increasing the memory read/write speed by using internal registers
