| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a microcomputer in which onboard writing can be performed by user exclusive use communication protocol even if serial interface is not made on a mounting board, and in which the user exclusive use communication protocol codes are not destroyed even if the microcomputer runs away. <P>SOLUTION: The microcomputer is provided with a CPU (2), a non-volatile memory (13), and a RAM (3). The non-volatile memory includes a first domain (Tmat) which possesses a communication control program processed by the CPU, a second domain (Umat) in which interface with the outside is established by the processing of the communication control program by the CPU and deleting and writing are enabled, and a third domain (Mmat) in which interface with the outside is established by the processing of the communication control program by the CPU, deleting and writing are enabled, and deleting and writing are enabled by the processing of the program of the second domain by the CPU. The second domain and the third domain can be selected exclusively by a register. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
