采用计时器电路按照规定的时间间隔控制在线和离线塔的开关，从而使空气干燥和干燥剂再生可连续进行。
The timer circuits in accordance with the prescribed time interval control online and offline tower, thus make the switch of dry air and desiccant can continuously regeneration.
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。
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。
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.
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