| 摘要 |
<p>PROBLEM TO BE SOLVED: To optionally set an input terminal/output terminal or a pull-up/ pull-down state for each terminal. SOLUTION: This circuit includes a PROM 36 which stores the pull-up state of a terminal 31 and a holding circuit 37 which reads out and holds the contents stored in the PROM 36 when a power supply is applied. Then the terminal 31 is set in a pull-up state according to the contents held by the circuit 37.</p> |
