| 摘要 |
PURPOSE:To specify access by a logical address in a microprocessor reversely connected to each memory for each service by providing the titled processor with a means converting a logical address outputted from the microprocessor into a physical address having a different address. CONSTITUTION:The microprocessor 1 specifies an address to a memory element 3 including a program memory and a data memory through address buses AB0- AB12. In addition, the microprocessor 1 supplies upper adress signals AB13- AB15 to a mapping circuit 4. The mapping circuit 4 converts the upper address signals in accordance with mapping data stored in its inside and outputs upper physical address signals 50, 60, 70. The upper physical address signal 70 specifies the address of the memory element 3 directly and the upper physical address signals 50, 60 are supplied to a chip selecting circuit 2. |
