| 摘要 |
<p>PURPOSE:To make the memory low in cost by using a frequency division means of a clock signal and a means for writing a signal on a memory at each other line of a face data memory to thin out and write data when reduced plural-page copy mode is set. CONSTITUTION:A serial shift register (SR) 59 of a CCD control section 27 inputs a VIDEO signal and outputs a signal LD to an FF 60. A DACK (DMA acknowledge) signal is inputted to a clear terminal of an FF 61 and a DRQ of a DMA controller is cleared. A frequency divider 63 uses a select signal being at L level when reduced plural-page copy mode is set to apply 1/2 frequency division to the clock signal. Through the constitution above, data is written on the DRAM 26 by setting a head address of the DRAM 26 and one line data number at each line, and at the normal copy mode, all lines are written, while each other line is written in the reduced plural-page copy mode. Thus, data for many pages are processed by using a memory capacity required for the normal copy mode.</p> |
