| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a bar code reader which can demodulate a bar code without leaving the data of bar width. SOLUTION: A DMA controller 15 DMA-transfers a bar width data group generated by a bar width counter 11 to external RAM 13. The DMA controller 15 DMA-transfers the bar width data group written into external RAM 3 to internal RAM 16. MPU 19 reads the bar width data group written into internal RAM 16 at high speed and demodulates the bar width data group which is read during reading.</p> |
