The control of buzzer is realized, and the 89C51 microcontroller is simulated on the Proteus platform.

Filename	Size	Update
89C51PWM\PWMTEST\Last Loaded TEST.DBK	67340	2008-07-27
89C51PWM\PWMTEST\STARTUP.A51	5115	2002-04-16
89C51PWM\PWMTEST\STARTUP.lst	11785	2008-07-27
89C51PWM\PWMTEST\TEST	965	2008-07-27
89C51PWM\PWMTEST\TEST.DSN	69996	2008-07-27
89C51PWM\PWMTEST\TEST.hex	428	2008-07-27
89C51PWM\PWMTEST\TEST.M51	4469	2008-07-27
89C51PWM\PWMTEST\TEST.Opt	1020	2008-07-27
89C51PWM\PWMTEST\TEST.pdsprj.Lq-PC.Lq.workspace	328	2016-12-12
89C51PWM\PWMTEST\TEST.pdsprj.LQQ-PC.LQQ.workspace	328	2017-03-15
89C51PWM\PWMTEST\TEST.plg	826	2008-07-27
89C51PWM\PWMTEST\TEST.PWI	766	2008-10-19
89C51PWM\PWMTEST\TEST.Uv2	2002	2008-07-27
89C51PWM\PWMTEST\TEST_Opt.Bak	1130	2008-07-27
89C51PWM\PWMTEST\TEST_Uv2.Bak	2095	2008-07-27
89C51PWM\PWMTEST\Text.ASM	1790	2008-07-27
89C51PWM\PWMTEST\Text.LST	6235	2008-07-27
89C51PWM\PWMTEST\Text.OBJ	1008	2008-07-27
89C51PWM\PWMTEST\新势力单片机嵌入式.url	198	2008-11-05
89C51PWM\PWMTEST\新势力论坛.txt	186	2008-11-23
89C51PWM\PWMTEST\重要说明.txt	186	2008-11-23
89C51PWM\新势力单片机嵌入式.url	198	2008-11-05
89C51PWM\新势力论坛.txt	186	2008-11-23
89C51PWM\重要说明.txt	186	2008-11-23
89C51PWM\PWMTEST	0	2017-03-15
89C51PWM	0	2016-12-04

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