MCS-51单片机系统及接口技?习题?含答? - 百度文库

MOV TH0, #0AH MOV TL0, #0DH

ü/ʱT0ڶʱʽ1

ֵʱʱΪ___ Ĵ PSW Cr AFRSRS0 OV -P ---- TMDGACM1 M0 GATC/M1 M0 O

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SETB TR0

D7 DD6 5 D4 D3 D2 DD1 0 C 0 1 TE /T E T

198.

ij£ CLR C CLR RS1 CLR RS0 MOV A, #30H

MOV 28H, #28H

״̬ MOV R0, A MOV 29H, R0 SETB RS0 MOV R1, A MOV 28H, C

R0R1ĵֱַΪ

ִкƬRAMУ28H=0(29H)= 30H

199.

MCS-514鹤ĴַΧ

Ϊ

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200.

MCS-51Ƭ20H~2FHΧڵݴ洢 ôָMCS-51ij洢 MOVX A@DPTR

Ѱַʽ

ȿֽѰַֿ Ѱַ

201.

ǷΪ

202.

203.204.

8051ж ȼ

MCS-51УT0жϷڵַ PSWУRS1 RS0=11HʱR2ĵַ MOV C20HѰַʽ ٶSP=60HACC=30HB=70HPUSH ACC PUSH B

Ϊ

205.

Ϊ

206.207.

ִָ

󣬣SP= 61H= 70H 62H= 00H

208.

ۼAдһֵСڻ127

35 ҳ 61 ҳ

8λ޷CYִСRLC AָAΪԭ

塢Ķ ԣ

һѡ 1.

BC

2. BCD 3. C 4. A 5. D 6. A 7. A 8. C 9.

C

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