ACTIVATING METHOD OF TIME-OUT INTERRUPT IN TIMER

摘要

initiating a timer to be programmed, driving a time-out interrupt signal to be "0", and becoming a value of tag bit "0"; executing a clock counting until an input clock to the timer is a rising edge; if the rising edge, generating a time-out in which a value of a current count register as "1" and a value of a base count register as "0"; driving the time-out interrupt signal whenever the time-out is generated and determining whether the clock is the rising edge; if the value of the current count register is not "1" and the value of base count register is not "0", if the time-out interrupt signal is not driven, returning to the executing the clock counting step; if the time-out interrupt signal is driven and the tag bit value is "3", withdrawing the drive of the time-out interrupt signal to change the tag bit value into "0"; if the time-out interrupt signal is driven and the tag bit value is not "3", increasing the tag bit value by "1" and returning to the executing the clock counting step.