| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain an electronic device in which the writing and erasing of flash ROM are executed with a connector for executing connection to a host substrate in a state where the flash ROM is mounted. SOLUTION: When the bus control part 6 of an electronic device 1 receives a change-over signal indicating writing in FROM 3, an address bus signal selecting part 61 changes over the connection of a FROM address bus from a CPU address bus to a host address bus, a data bus signal selecting part 62 changes over the connection of the FROM data bus from a CPU data bus to a host data bus and a control bus signal selecting part 63 changes over the connection of a FROM control bus from a CPU control bus to a host control bus so that CPU 21 of a host device 20 is connected to FROM 3.</p> |
