Introduction - If you have any usage issues, please Google them yourself
48M clock signal timing delay set well in advance through the the delay signal received buzzer beep sound. Moderator, looting, to answer in time, answer time, four signals trigger count delay, the last three alarm signal phase and (because the system is set to active low), as the last of the alarm signal . Each trigger delay time, when the trigger signal is invalid (' 1 ' ), the count value is zero, and when the trigger signal is effective (' 0' ), starts counting the number of clocks, credited to a certain pre-set (according to need) number, to obtain the delay time (delay time = the number of clocks* clock cycle), the time delay an alarm signal is invalid, and to obtain a certain time of the alarm signal.