| 摘要 |
PROBLEM TO BE SOLVED: To easily realize an address generating/mapping circuit for recording an image in a memory after it is caught by using a mode selection signal. SOLUTION: A counter 110 counts the number equivalent to the number of pixels constituting a horizontal line of an image signal in an address generation mode to output as a low-order address of a memory 150, and is cleared by a clear signal having the same frequency as the frequency of the horizontal synchronizing signal of the image signal, and connects an address line outputted from a microprocessor 100 with the low-order address line of the memory 150. In such a case, when the input image signal is inputted to an input terminal of an analog/digital(A/D) converter, the image signal is converted into a digital signal by the A/D converter. Thus, the converted digital signal is stored in the memory 150, the image data are caught. Further, the address is generated by operating the counter 110. |
