| 摘要 |
<p>PURPOSE: To remove the influence of a digital noise at the time of reading out coordinates. CONSTITUTION: A coordinate detection part 1 transmits coordinate information obtained from a tablet to a system control CPU 201 in a body part 2 and the CPU 201 executes document preparing processing based upon the coordinate information. A tablet controlling CPU 101 holds the CPU 201 as a prestage for coordinate input. Then the CPU 101 enters the coordinate information from the tablet, resets the held state of the CPU 201 and transmits the coordinate information to the CPU 201. Thereby a power supply system and reference voltage for the coordinate detection part 1 can be stabilized and an accurate coordinate value can be recognized. Consequently the influence of a digital noise applied from the outside of the detection part 1 can be removed at the time of reading out coordinates.</p> |
