第三章单元测试
- What is the jump range of instruction LJMP? （ ）
- What is the addressing mode of the second operand in the instruction MOVX A, @DPTR ? （ ）
- If MOV (direct) is used for address 87h which type of memory is accessed? （ ）
- The Stack Pointer will be decremented when a PUSH operation is made? ( )
Which instruction will clear the low nibble of A if A = C5h?
A:256B
B:1KB
C:64KB
D:2KB
答案:64KB
A:Indirect
B:Direct
C:Register
D:Immediate
A:SFRs B:Register A C:Internal RAM D:External RAM
A:对 B:错
A:
ORL A, #0Fh
B:ANL A, #0F0h
C:XRL A, #0FFh
D:SWAP A
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