Use STC15F204EA do master, internal 12M crystal, P2 port access digital tube segment code       P3 mouth high four connected digital bit option, other interfaces see Program Description Software:       1. Set the time range 0 hours 0 minutes (three seconds) to 99 hours 59 minutes       2. The countdown to the last minute only display the number of seconds       3. regular time after 00:00 flashes and beeps 1 minute       4. During the tweet can press+,- button to cancel chirping

简易定时器设计\C__工程\STARTUP.A51
..............\.......\time
..............\.......\time.c
..............\.......\time.hex
..............\.......\time.lnp
..............\.......\time.LST
..............\.......\time.M51
..............\.......\time.OBJ
..............\.......\time.plg
..............\.......\time.uvopt
..............\.......\time.uvproj
..............\.......\time_uvopt.bak
..............\.......\time_uvproj.bak
..............\源代码.txt
..............\设计要求.png
..............\C__工程
简易定时器设计

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