| 摘要 |
PURPOSE:To transfer information at a high speed and protect stored information by adding a signal to information and performing read/write only in a required part of a memory. CONSTITUTION:When power is supplied to an electronic device, a system is initialized, and the operation mode of the electronic device is set. At this time, a controller 3 uses a memory 1 and an electronic device 2 to store data in the memory 1. Marker data indicating the end of data is stored at the last of stored data. When a switch 5 is turned on, the controller 3 accepts an interrupt, and the start address of the memory 1 is set; and when a switch 4 is turned on, contents of the memory 1 are read out to an external device; but if the switch 4 is turned off, information is read in. In this case, information is read in if a start bit is added to information, but information is not read in if the start bit is not added. |
