| 摘要 |
<p>A flip-flop has both a system output (55, 95, 145) and a scan output (56, 96, 146). A system output signal for the flip-flop is placed on the system output (55, 95, 145). When the flip-flop is in a normal operating mode, a scan output signal on the scan output (56, 96, 146) is held at a static logic level. When the flip-flop is in a scan mode, the scan output signal on the scan output (56, 96, 146) transitions between logic 1 and logic 0 synchronous with transitions of the system output signal on the system output (55, 95, 145).</p> |
