摘要
MCS-51单片机的ALE信号,在单片机系统中的使用十分重要,但现有中文资料中叙述不够清楚。将SFR8EH的bit0位设为1或0,是否执行MOVC或MOVX,对ALE信号进行了详细测试及分析。测试结果清楚的给出了ALE波形图,为正确地使用ALE信号提供了准确参考。
ALE of the MCS-51 microcontroller family,it plays a very important role in SCM system,but the description was ambiguous in existing Chinese data.Bit 0 of SFR location 8EH was set or cleared,whether a MOVX or MOVC instruction was run or not,ALE was carefully tested and analyzed.The test results clearly showed the ALE waveform,and provided the accurate references for how to correctly use ALE.
出处
《国外电子测量技术》
2012年第9期37-39,共3页
Foreign Electronic Measurement Technology
