| 可编程定时计数器计数波形的实时观测与研究 |
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| 引用本文： | 陈晓风.可编程定时计数器计数波形的实时观测与研究[J].福建师范大学学报(自然科学版),2000,16(4):30-32. |
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| 作者姓名： | 陈晓风 |
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| 作者单位： | 福建师范大学计算机系,福建,福州,350007 |
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| 摘 要： | 应用查询或中断控制技术实时观测8253可编程定时计数器的各种计数波形，实验结果表明，8253计数器的计数频率可数倍于2．5MHZ，并且在计数模式3下的奇分频系数必须大于等于5才有效，本实验为提高8253计数器的使用效能提供了可靠的实验依据。
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| 关 键 词： | 可编程计数器 计数模式 查询 中断技术 计数波形 计数频率 奇分频系数 实时观测 |
To Observe Counting Waves of Programmable Interval Timer and Research |
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| CHEN Xiao-feng.To Observe Counting Waves of Programmable Interval Timer and Research[J].Journal of Fujian Teachers University(Natural Science),2000,16(4):30-32. |
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| Authors: | CHEN Xiao-feng |
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| Abstract: | Applying polling or interrupt control technique, to observe the counting waves of 8253 programmable interval timer. The experiment results showed that counting frequency of 8253 PIT may many times higher than 2 5 MHz and odd counting value must be large or equal 5 valid in counting mode 3. The experiment results provide reliable experiment data to increase utilizable of 8253 PIT. |
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| Keywords: | programmable interval timer counting modes and waves polling and interrupt techniq |
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