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.
刷新周期一般由一个叫DRAM控制器的外设完成。
The refresh cycles are usually performed by a peripheral called a DRAM controller.
该视频控制器的以赫兹表示的最大刷新速率。
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