| 摘要 |
<p>PURPOSE:To determine the phase of a signal outputted from a microcomputer to an external with an external reference phase by controlling the frequency division phase of a frequency divider, which divides the frequency of the pulse signal of a pulse oscillating circuit, from the external. CONSTITUTION:A frequency divider 3 connected to an oscillating circuit 1 consists of a counter; and when a reset signal is inputted to the reset signal input terminal of the counter, the counted value of the counter is reset to zero, and counting is started at this time. Consequently, the frequency division phase o the frequency divider 3 is controlled to synchronize the phase of a fundamental clock 4 with the external reference phase if the reset signal is inputted from a terminal 13 in accordance with the external reference phase. Thus, the phase of the fundamental clock 4 is determined in relation to the external reference phase to synchronize the phase of the output signal to an external terminal 12 with the external reference phase.</p> |
