Using AT89C51 single-chip timing, timing counter T0 seconds, seconds count as a time when the second generation, plus 1 seconds count, count to 60 seconds, automatically the beginning of 0. Crystal frequency chip 12MHZ to 60 seconds, automatically the beginning of 0. MCU/crystal oscillator frequency is 12MHZ//1: with AT89C51 microcontroller timer/counter T0 timer seconds /, counts as a second time, when a second generation, second and 1// count, count to 60 seconds, automatically the beginning of 0. Crystal frequency chip// 12MHZ

99计时器
........\99计时器程序.txt
........\Last Loaded TM99.DBK
........\TM99.ASM
........\TM99.DSN
........\TM99.PWI
........\TM99.SDI
........\TM99.hex
........\TM99.lst

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