| 摘要 |
PURPOSE:To prevent data in a common memory from being damaged by a careless mis-programming, by performing a write to a common memory area only by a dedicated write command. CONSTITUTION:When an address on the common memory area is designated erroneously in the process of programming, and an instruction text 4 using a general write instruction inserted in the common memory is read out, a computer interrupts a process, and outputs an error signal. The write instruction is executed only when STC8100AB, and a dedicated write instruction STC2, shown in mark 6, are read out. In this way, it is possible to prevent a careless write to the common memory due to errors, such as the mis-programming, etc. |
