| 摘要 |
<p>PURPOSE:To easily and quickly change a program by storing the parts of the program having the small possibility of change into a 1st storage element and also storings control constant, etc., having the possibility of change into a 2nd storage element provided outside a central arithmetic processing part as a supplementary program respectively. CONSTITUTION:A microcomputer 2 contains a built-in memory 8 as a 1st storage element, and this memory 8 stores an arithmetic processing procedure, etc. A nonvolatile external memory 9 is added as a 2nd storage element and stores the program parts including an arithmetic constant, etc., having the possibility of change as a supplementary program to a program stored in the element 8. Thus a program is easily changed just with exchange of the element 9.</p> |
