| 摘要 |
<p>PURPOSE: To prevent plural matching with respect to a single matching value by comparing the contents of a matching register and a timing reference signal so as to make matching recognition possible or impossible. CONSTITUTION: When the input of a TCR1 bus or a TCR2 bus to an acquisition register 131 is equal to or more than an input to the matching register 132, a comparator 133 generates an output. Then whenever a matching recognizing latch 150 is set, the output of a latch 150 simultaneously clears or inactivates an MRL enable latch 157. Thereby, one of the inputs to an AND gate 155 is inactivated to prevent the latch 150 from being activated again. Thereby plural matching to a single matching value is prevented.</p> |
