| 摘要 |
<p>PURPOSE:To rapidly and easily set an option in line with a user's opinion by arbitrarily setting a selecting circuit according to optional data stored in a PROM. CONSTITUTION:Optional data 101 is input to a latch 2 for storing the optional data from a PROM 1 for storing the data. Then, control signals 102-1,..., 102-n are respectively input to blocks of n pieces of optional circuits/elements 3-1,..., 3-n according to the optional data. Then, the input signal is operated as a control signal for a MOS transistor having a role of a switch to turn ON or OFF a switch circuit. Thus, connection of relevant circuits with the optical circuits or the elements included in the blocks of the optional circuits/elements 3-1, 3-n, etc., is suitably controlled and selected.</p> |
