MCS-51单片机设计一方波发生器,周期为500ms的程序。汇编语言!答:定时50ms,软件计数5次 ORG 0000H LJMP START ORG 000BH LJMP Timer0Interrupt START:MOV SP,#60H MOV TMOD,#01H MOV TH0,#3CH MOV TL0,#0B0H MOV R7,#5 SETB P1.0;输出方波引脚 SETB EA SETB ET0 SETB TR0 SJMP Timer0Interrupt:MOV TH0,#3CH MOV TL0,#0B0H DJNZ R7,RT MOV...