| 摘要 |
PURPOSE:To operate a microcomputer efficiently by interrupting the microcomputer at the points of time of charge accumulation in a CCD which is hardly brought under time control and motor control for automatic focusing, and making an advance to a next processing program. CONSTITUTION:When a camera in a stand-by state enters operation with a light measurement switch SW1 on and light measurement and the charge accumulation of the CCD are started at the same time, no integral data is fetched unless an AF priority flag is set to '1'. When the light measurement switch SW1 is turned off, on the other hand, a control signal line AFSTART from an output terminal P2 of a CPU1 is returned from an L level to an H level to send a forcible integration stop instruction to an AF distance measurement part 2. A control signal line, the inverse of IENDEN from an output terminal P12 is returned from the L level to the H level to inhibit interruption from being initiated on the end of the integration. |
