programmable interval

if programmable interval time used for timings, periodic interrupts

如果把可编程的时间间隔用于计时，那么定期中断

It is mainly composed of DMA controller ( 82C37), interrupt controller ( 82C59), programmable interval timers ( 82C54), DRAM refresh control, wait state generator and system reset logic.

其内部主要由DMA控制器（82C37）、中断控制器（82C59）、可编程间隔计时器（82C54），DRAM刷新控制器，等待状态产生器，系统重置电路组成。

Optimization Design of Dynamic State Test Method of Safety Interval for Programmable Electron-Time Fuze

可编程电子时间引信保险距离动态试验方法的优化设计

In the design of the main oscillating circuit, the programmable timing counter IC of 8254 is controlled by the single chip computer to adjust the pulse width and interval, which provides the precise adjustment on the pulse width and interval in a wide range.

在主振脉冲发生电路的设计上，通过单片机控制可编程定时计数器芯片8254来控制脉冲宽度和脉冲间隔，使脉冲宽度和脉冲间隔在很宽的范围内可以精确调节。

In the hardware system, single-chip computer ( AT 89 C 51 ) and programmable interval timer ( 8253 ) is the major hardware system.

在硬件系统中采用了AT89C51单片机与 8253 作为核心产生脉冲信号,结构简单,脉冲周期范围大.