| 摘要 |
<p>PURPOSE:To efficiently execute various inputs including character patterns by using the direction and quantity of force applied to an operation board as input information. CONSTITUTION:A pressure sensor part 1 mounted on a pattern input part 9 is constituted of variable resistors having bridge connection. Respective outputs from sensors S1-S4 for detecting variable resistor outputs are amplified by an amplifier part 2 and inputted to an A/D converter 3. The A/D converter 3 selects only one input out of four inputs by a 2-bit selecting signal SEL and A/D converts the selected signal. An A/D-converted serial output SO is inputted to an MPU 4 and CLK IN is a lock input for transfer. The A/D converter 3 is controlled by the MPU 4. When the pattern input board is pressed by either one of arcs, respective bridge outputs are changed and an input pattern is specified based on the change value and the depressed time.</p> |
