【简答题】什么是最小移频键控?MSK信号具有哪些特点。
【单选题】(A)=40H,(R0)=00H,(R1)=00H,(30H)=0ABH,(40H)=7FH。执行以下指令后,(A)=? MOV A, #30H MOV R0,A MOV 40H,@R1 MOV A,@R1
【简答题】执行下面三条指令后,30H单元的内容是40H。 MOV R1,#30H MOV 40H,#0EH MOV R1,40H 错误:______ 改正:______
【单选题】已知(40H)=60H,(41H)=20H,R0=40H,R1=41H,执行如下指令后,41H单元中的内容是()MOV A,@R0; MOV @R1,A;
【简答题】若(R1)=30H,(A)=40H,(30H)=60H,(40H)=08H。分析单片机执行下列程序段后,(R1)=( ),(A)=( ),(30H)=( ),(40H)=( ) MOV A,@R1 MOV @R1,40H MOV 40H,A MOV R1,#7FH