| 摘要 |
<p>PURPOSE:To prescribe control timing of signal output of a digital signal processor etc. accurately and easily by detecting frame start by an external signal, setting an initial value that indicates a specified output time to a timer counter and executing a synchronizing instruction. CONSTITUTION:A timer counter 11 is started by an external signal that determines period of signal processing, and a specified timer time longer than the longest execution time out of varying execution time of processing made by a digital signal processor before a specified time is set initially. The digital signal processor executes a synchronizing instruction after completion of processing made before a specified time and makes control to prohibit execution of next instruction until timer time set to the timer counter 11 arrives. Thereby, it is made possible to send out signals after the lapse of a fixed time even when procedure of processing of a program is changed by condition.</p> |
