| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a microcomputer, efficiently loading a user program of an arbitrary size from an external serial flash memory to a required memory to execute it. <P>SOLUTION: The microcomputer includes a serial peripheral interface circuit 10 which is initialized to be adapted to a serial flash boot mode in response to a reset instruction. When the serial flash boot mode is designated and the reset instruction is canceled, the serial peripheral interface circuit transfers a transfer control program TPGM from a serial flash memory 21 to an internal RAM 3. A central processing unit executes the transfer control program transferred to the internal RAM to transfer a user program UPGM from the serial flash memory to an external memory 20, whereby the central processing unit can execute the user program transferred to the external memory. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
