| 摘要 |
PURPOSE:To easily read a state of a value is set in a register to recognize it without enlarging the size of a system by connecting a writable register group and a readable RAM to the same address in a bus and reading the value which is set from RAM. CONSTITUTION:The writable register group 3 which sets the value, controls an external circuit and the readable RAM 5 which can read and write, are allocated to the same address and they are connected to the bus 2. At the time of setting the value, the value is simultaneously written in the register conerned among the register group 3 allocated to the same address and in the area concerned of RAM 5, and the value is read from the area concerned of RAM 5. |
