| 摘要 |
<p>A data processor includes a program memory composed of an electrically programmable read only memory, the program memory including a first region asigned for storing programs and a second region assigned for storing two bits of control information. The data processor also includes a controller receiving the two bits of control information from the second region of the program memory for allowing a content of the first region of the program memory to be outputted from the data processor to an external device only when the two bits of control information stored in the second region of the program memory are different from each other.</p> |
