De Cuong on Thi Mon Vi Xu Ly

7/30/2019 De Cuong on Thi Mon Vi Xu Ly

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cng n thi mn Vi x l h Cao ng & i hc.

1

Trng H Cng Nghip TP.HCM

Khoa Cng ngh in T

B mn in T Cng Nghip

CNG N THI MN VI X L.(H CAO NG & I HC)Ngy cp nht: 09/11/2005

S cu: 533

1. Chip vi iu khin 8051 c sn xut ln u tin vo nm

no? Do nh sn xut no

ch to?a. 1976 - Hng Intel b. 1976 - Hng Motorola

c. 1980 - Hng Intel d. 1980 - Hng Zilog.

2.M lnh t b nh chng trnh bn ngoi, sau khi c CPU c vo s c

cha ti

b phn no trong CPU.

a.Thanh ghi PC

b. Thanh ghi IRc. n v gii m lnh v iu khin

d. ALU.

3.B phn no trong CPU dng lu gi a ch ca lnh k tip trong b

nh chng

trnh m CPU cn thc hin.

a.Thanh ghi PC

b. Thanh ghi IRc. n v gii m lnh v iu khin


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d. ALU.

4. Nhim v ca CPU l:

a. iu hnh hot ng ca ton h thng theo nh ca ngi

s dng thng qua chng trnh iu khin.

b. Thi hnh chng trnh theo vng kn gi l chu k lnh.c. Giao tip vi cc thit b xut nhp.

d. C hai cu a v b u ng.

5. M BCD nn l:a. Kt hp hai s BCD thnh 1 byte.

b. Thay 4 bit cao bng 0H.

c. S BCD di 1 byte.

d. Thay 4 bit thp bng 0H.6. M b 2 ca 1 s nh phn c to ra bng cch:a. o trng thi tt c cc bit ca s nh phn.

b. Cng thm 1 vo m b 1

c. Cng thm 2 vo m b 1

d. Ly b 1 tr i 1

7. M b 1 ca 1 s nh phn c to ra bng cch:a. o trng thi tt c cc bit ca s nh phn.

b. Cng thm 1 vo m b 1

c. Cng thm 2 vo m b 1

d. Ly b 1 tr i 1

Bin son: B mn in t Cng nghip


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8. Giao tip song song l phng thc giao tip (so snh vi giao tip ni tip):a. Truyn t hai bit tr ln, tc truyn chm, khong cch truyn gn.

b. Truyn t hai bit tr ln, tc truyn chm, khong cch truyn xa.

c. Truyn t hai bit tr ln, tc truyn nhanh, khong cch truyn gn.

d. Truyn t hai bit tr ln, tc truyn nhanh, khong cch truyn xa.

9. Giao tip ni tip l phng thc giao tip (so snh vi giao tip song song):a. Truyn tng bit, tc truyn chm, khong cch truyn gn.

b. Truyn tng bit, tc truyn chm, khong cch truyn xa.

c. Truyn tng bit, tc truyn nhanh, khong cch truyn gn.

d. Truyn tng bit, tc truyn nhanh, khong cch truyn xa.

10.ROM l loi b nh bn dn c c tnh:a. Cho php c d liu t ROM, khng cho php ghi d liu vo

ROM, mt d liu khi mt ngun in.

b. Cho php c d liu t ROM, khng cho php ghi d liu vo

ROM, khng mt d liu khi mt ngun in.

c. Cho php c d liu t ROM, cho php ghi d liu vo ROM,

mt d liu khi mt ngun in.

d. Cho php c d liu t ROM, cho php ghi d liu vo ROM,

khng mt d liu khi mt ngun in.

11.RAM l loi b nh bn dn c c tnh:a. Cho php c d liu t RAM, khng cho php ghi d liu vo

RAM, mt d liu khi mt ngun in.

b. Cho php c d liu t RAM, khng cho php ghi d liu vo

RAM, khng mt d liu khi mt ngun in.

c. Cho php c d liu t RAM, cho php ghi d liu vo RAM,

mt d liu khi mt ngun in.

d. Cho php c d liu t RAM, cho php ghi d liu vo RAM,

khng mt d liu khi mt ngun in.


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12.Loi b nh ROM cho php ta ghi d liu vo v xo d liu i bng tia cctm:

a. PROM b. MROM c. UV-EPROM d. Flash

ROM.

13.Loi b nh ROM cho php ta ghi d liu vo v xo d liu i bng tn hiuin:

a. PROM b. MROM c. UV-EPROM d. Flash

ROM

14.Loi b nh bn dn c th mt d liu ngay khi vn cn ngun in cungcp:

a. SRAM b. DRAM c. PROM d.

MROM.15.Loi b nh ROM cho php ta c th ghi d liu vo v xo d liu:a. PROM b. MROM

c. EPROM d. C ba cu a, b, c u ng.

16.Qu trnh lm ti (Refresh) d liu l qu trnh cn thit i vi loi b nhbn dn:

a. SRAM b. DRAM c. EEPROM d. Flash

ROM.17.B nh bn dn 8 bit c m s 62512 cho bit dung lng ca b nh ny:a. 512 KB b. 512 Kbit c. 62512 Kbit d. 62512

KB

18.B nh bn dn 8 bit c m s 62256 cho bit dung lng ca b nh ny:a. 62256 KB b. 62256 Kbit c. 256 Kbit d. 256 KB

19.B nh bn dn 8 bit c m s 62128 cho bit dung lng ca b nh ny:a. 62128 KB b. 62128 Kbit c. 128 Kbit d. 128 KB20.B nh bn dn 8 bit c m s 6264 cho bit dung lng ca b nh ny:a. 64 Kbit b. 6264 Kbit c. 6264 KB d. 64 KB

21.B nh bn dn 8 bit c m s 6232 cho bit dung lng ca b nh ny:a. 6232 KB b. 32 KB c. 6232 Kbit d. 32

Kbit


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22.B nh bn dn 8 bit c m s 6116 cho bit dung lng ca b nh ny:a. 6116 KB b.6116 Kbit c. 16 Kbit d. 16 KB

23.B nh bn dn 8 bit c m s 27512 cho bit dung lng ca b nh ny:a. 27512 KB b.64 KB c. 27512 Kbit d. 64

Kbit.

24.B nh bn dn 8 bit c m s 27256 cho bit dung lng ca b nh ny:a. 27256 KB b. 32 Kbit c. 32 KB d. 27256

Kbit.

25.B nh bn dn 8 bit c m s 27128 cho bit dung lng ca b nh ny:a. 27128 KB b. 27128 Kbit c. 16 Kbit d. 16

KB .

26.B nh bn dn 8 bit c m s 2764 cho bit dung lng ca b nh ny:a. 2764 KB b. 2764 Kbit c. 8 KB d. 8 Kbit.

27.B nh bn dn 8 bit c m s 2732 cho bit dung lng ca b nh ny:a. 2732 KB b.4 KB c. 2732 Kbit d. 4 Kbit.

28.B nh bn dn 8 bit c m s 2716 cho bit dung lng ca b nh ny:a. 2 KB b.2716 Kbit c. 2716 KB d. 2 Kbit.

29.B nh bn dn 8 bit c m s 6116 cho bit s chn a ch ca b nh ny:a. 9 chn b. 10 chn c. 11 chn d. 12 chn

30.B nh bn dn 8 bit c m s 2732 cho bit s chn a ch ca b nh ny:a. 9 chn b. 10 chn c. 11 chn d. 12

chn

31.B nh bn dn 8 bit c m s 2764 cho bit s chn a ch ca b nh ny:a. 13 chn b.14 chn c. 15 chn d. 16 chn

32.B nh bn dn 8 bit c m s 61128 cho bit s chn a ch ca b nh ny:a. 13 chn b.14 chn c. 15 chn d. 16 chn

33.B nh bn dn 8 bit c m s 61256 cho bit s chn a ch ca b nh ny:a. 13 chn b. 14 chn c. 15 chn d. 16 chn


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34.B nh bn dn 8 bit c m s 62512 cho bit s chn a ch ca b nh ny:a. 13 chn b. 14 chn c. 15 chn d. 16

chn

35.B nh bn dn 8 bit c m s 2716 cho bit s chn d liu ca b nh ny:a. 8 chn b.9 chn c. 10 chn d. 11chn.

36.B nh bn dn 8 bit c m s 2732 cho bit s chn d liu ca b nh ny:a. 14 chn b. 12 chn c. 10 chn d. 8 chn

37.B nh bn dn 8 bit c m s 61128 cho bit s chn d liu ca b nh ny:a. 12 chn b. 14 chn c. 8 chn d. 10 chn

38.B nh bn dn 8 bit c m s 62512 cho bit s chn d liu ca b nh ny:a. 14 chn b. 10 chn c. 8 chn d. 12 chn39.Trong h thng bus ca my tnh, loi bus no l bus 2 chiu:a. Bus d liu b. Bus a ch

c. Bus iu khin d. C ba cu a, b, c u ng.

40.Trong h thng bus ca my tnh, bus a ch c chiu di chuyn thng tin ach i t:

a. T CPU n b nh v thit b ngoi vi.

b. T b nh v thit b ngoi vi n CPU.c. C hai cu a v b u ng.

d. C hai cu a v b u sai.

41.Trong h thng bus ca my tnh, bus d liu c chiu di chuyn thng tin dliu i t:

a. T CPU n b nh v thit b ngoi vi.

b. T b nh v thit b ngoi vi n CPU.

c. C hai cu a v b u ng.d. C hai cu a v b u sai.



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42.Mt b vi x l c 20 ng dy a ch. Cho bit s lng v trnh m b vi x l

c kh nng truy xut:

a. 1024 b. 1024 K c. 1024 M d. 1024 G

43.S lng b m/b nh thi (Timer) c trong chip vi iu khin 8051 l:a. 1 b. 2 c. 3 d. 4

44.Dung lng b nh d liu c trong chip 8051 l:a. 128 byte b. 256 byte c. 8 KB d. 4 KB

45.Dung lng b nh chng trnh c trong chip 8051 l:a. 128 byte b. 256 byte c. 8 KB d. 4 KB

46.Chip vi iu khin 8051 c bao nhiu port xut nhp d liu:a. 1 b. 2 c. 3 d. 4

47.Dung lng b nh chng trnh ngoi v b nh d liu ngoiti a m chip 8051 c

kh nng truy xut l:

a. 32 KB b. 64 KB c. 128 KB d. 256

KB.

48.Trong chip vi iu khin 8051, cc port xut nhp c hai cng dng l:a. P1, P2, P3 b. P0, P1, P2 c. P0, P2, P3 d. P0, P1,

P3

49.Trong chip vi iu khin 8051, port ch? c chc nng xut nhp c bn l:a. P0 b. P1 c. P2 d. P3

50.Khi cc port xut nhp ca 8051 ng vai tr l port xut nhp dliu th port no cn

phi c in tr ko ln bn ngoi:

a. P0 b. P1 c. P2 d. P3

51.Khi chip 8051 s dng b nh bn ngoi th port no ng vai trl bus a ch byte thp


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v bus d liu a hp ( AD0.. AD7 ):

a. P0 b. P1 c. P2 d. P3

52.Khi chip 8051 s dng b nh bn ngoi th port no ng vai tr l bus ach byte cao:

a. P0 b. P1 c. P2 d. P353.Khi chip 8051 s dng b nh bn ngoi hay cc chc nng c

bit th port no ng vai

tr l cc tn hiu iu khin:

a. P0 b. P1 c. P2 d. P3

54.PSEN l tn hiu iu khin:a. Cho php truy xut (c) b nh chng trnh bn ngoi.

b. Cho php truy xut (s dng) b nh chng trnh bn ngoi.c. Cho php cht a ch thc hin vic gii a hp.

d. Cho php thit lp li trng thi hot ng cu chip 8051.

55.EA l tn hiu iu khin:a. Cho php truy xut (c) b nh chng trnh bn ngoi.

b. Cho php truy xut (s dng) b nh chng trnh bn ngoi.

c. Cho php cht a ch thc hin vic gii a hp.

d. Cho php thit lp li ch hot ng cu chip 805156.ALE l tn hiu iu khin:a. Cho php truy xut (c) b nh chng trnh bn ngoi.



d. Cho php thit lp li ch hot ng cu chip 8051.

57.RST l tn hiu iu khin:a. Cho php truy xut (c) b nh chng trnh bn ngoi.



d. Cho php thit lp li ch hot ng cu chip 8051.



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58.WR l tn hiu iu khin:a. Cho php c thng tin t b nh d liu ngoi.

b. Cho php ghi thng tin vo b nh d liu ngoi.

c. Cho php c thng tin t b nh chng trnh ngoi.

a. Cho php ghi thng tin vo b nh chng trnh ngoi.

59.RD l tn hiu iu khin:a. Cho php c thng tin t b nh d liu ngoi.

b. Cho php ghi thng tin vo b nh d liu ngoi.

c. Cho php c thng tin t b nh chng trnh ngoi.

a. Cho php ghi thng tin vo b nh chng trnh ngoi.

60.Tn s ph dng ca thch anh s dng cho hu ht cc chip vi iu khin hMCS-51 l:

a. 10 MHZ b. 11 MHZ c. 12 MHZ d. 13

MHZ

61.Chn PSEN ca chip 8051 thng c ni vi chn no ca bnh chng trnh bn

ngoi:

a. CS\ b. WR\ c. RD\ d.OE\

62.Nu tn s xung clock ca mch dao ng trong chip l 12 MHZ thtn s ca tn hiu ti

chn ALE l bao nhiu:

a. 12 MHZ b. 6 MHZ c. 2 MHZ d. 1 MHZ

63.Khi dng mch dao ng TTL bn ngoi to tn hiu xung clockcho chip 8051 th tn

hiu xung clock phi c a vo chn:

a. CS\ b. INT0\ c. XTAL1 d.XTAL2

64.Cc dy thanh ghi (bank) ca chip 8051 nm trong:a. B nh chng trnh bn trong.


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b. B nh chng trnh bn ngoi.c. B nh d liu bn trong.d. B nh d liu bn ngoi.65.Khng gian b nh chng trnh bn trong ca chip 8051 c dung lng tia l:a. 128 byte b. 256 byte c. 4 KB d.8KB

66.Khng gian b nh d liu bn trong ca chip 8051 c dung lng ti a l:a. 128 byte b. 256 byte c. 4 KB

d.8KB

67.Trong khng gian b nh d liu bn trong ca chip 8051, cc dy thanh ghic a ch:

a. 00H - 1FH b. 20H - 2FH c. 30H -7FH d.80H - FFH

68.Trong khng gian b nh d liu bn trong ca chip 8051, vngRAM nh a ch bit c

a ch:

a. 00H - 1FH b. 20H - 2FH c. 30H -7FH d.

80H - FFH

69.Trong khng gian b nh d liu bn trong ca chip 8051, vngRAM a chc nng c

a ch:

a. 00H - 1FH b. 20H - 2FH c. 30H -7FH d.

80H - FFH

70.Trong khng gian b nh d liu bn trong ca chip 8051, ccthanh ghi chc nng c

bit (SFR) c a ch:a. 00H - 1FH b. 20H - 2FH c. 30H -7FH d.

80H - FFH

71.Khi thc hin php nhn 2 s 8 bit vi nhau th byte cao ca ktqu s c cha trong

thanh ghi no?

a. Thanh ghi A b. Thanh ghi B c. Thanh ghi TH1 d.

Thanh ghi TL1.72.Khi thc hin php nhn 2 s 8 bit vi nhau th byte thp ca kt


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qu s c cha trong

thanh ghi no?

a. Thanh ghi A b. Thanh ghi B c.Thanh ghi TH1 d.

Thanh ghi TL1.



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73.Khi thc hin php chia 2 s 8 bit vi nhau th thng s caphp chia s c cha

trong thanh ghi no?

a. Thanh ghi SP b. Thanh ghi PSW c. Thanh ghi A d.

Thanh ghi B

74.Khi thc hin php chia 2 s 8 bit vi nhau th s d ca phpchia s c cha trong

thanh ghi no?

a. Thanh ghi SP b. Thanh ghi PSW c. Thanh ghi A d.

Thanh ghi B

75.Khi CPU thc hin php tnh s hc c nh th chip 8051 t c no ln mc1 ?

a. C nh CY b. C nh ph AC c. C F0 d.

C trn OV

76. bo 4 bit thp ca kt qu tnh ton thuc khong OH - 9Hhay thuc khong AH -

FH th chip 8051 s dng c no?


C trn OV

77. bo kt qu tnh ton cha trong thanh ghi A bng 0 hay khc 0th chip 8051 s dng

c no?


C trn OV

78. bo kt qu tnh ton ca php ton s hc (php ton c du) cnm trong khong t

-127 n +128 hay khng th chip 8051 s dng c

no?


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C trn OV

79. bo s ch s 1 trong thanh ghi A l s chn hay l th chip 8051 s dngc no?

a. C nh CY b. C nh ph AC c. C Pd.C trn OV

80. chn dy thanh ghi tch cc l dy 2 th cc bit RS0, RS1 phi c gi tr lbao nhiu?

a. RS0 = 0, RS1 = 0 c. RS0 = 1, RS1

= 0

b. RS0 = 0, RS1 = 1 d. RS0 = 1, RS1

= 181. chn dy thanh ghi tch cc l dy 1 th cc bit RS0, RS1 phi c gi tr l

bao nhiu?

a. RS0 = 0, RS1 = 0 c. RS0 = 1, RS1

= 0

b. RS0 = 0, RS1 = 1 d. RS0 = 1, RS1

= 1

82. chn dy thanh ghi tch cc l dy 3 th cc bit RS0, RS1 phi c gi tr lbao nhiu?a. RS0 = 0, RS1 = 0 c. RS0 = 1, RS1

= 0

b. RS0 = 0, RS1 = 1 d. RS0 = 1, RS1

= 1

83. chn dy thanh ghi tch cc l dy 0 th cc bit RS0, RS1 phi c gi tr lbao nhiu?a. RS0 = 0, RS1 = 0 c. RS0 = 1, RS1

= 0

b. RS0 = 0, RS1 = 1 d. RS0 = 1, RS1

= 1

84.i vi chip 8051 th vng nh c dng lm ngn xp (stack) c lu gitrong:

a. B nh chng trnh bn trong.b. B nh chng trnh bn ngoi.c. B nh d liu bn trong.


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d. B nh d liu bn ngoi.85.Vng nh c dng lm ngn xp (stack) c a ch kt thc l:a. 7FH b. FFH c. 2 FH d. 08 H

86.Nu khng khi ng thanh ghi SP th vng nh ca ngn xp(stack) c a ch bt u

l:

a. 80H b. 08H c. 00H d. 30H

87.Nu thanh ghi SP c gi tr l 5FH th vng nh ca ngn xp (stack) c ach bt u:

a. 5EH b. 5FH c. 6OH d. 61H

88.Nu thanh ghi SP c gi tr l 21H th vng nh ca ngn xp (stack) c ach bt u:a. 20H b. 21H c. 22H d. 23H

89.Nu thanh ghi SP c gi tr l 59H th vng nh ca ngn xp (stack) c ach bt u:

a. 5AH b. 58H c. 5BH d. 59H

90.Nu ngi lp trnh khng khi ng thanh ghi SP th khi 8051hot ng n s t ng

np vo trong thanh ghi SP mt gi tr l bao nhiu ?a. 80H b. 08H c. 70H d. 07H



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91.Thanh ghi DPTR c dng cha a ch ca nh cn truy xut thuc bnh:

a. ROM trong b. ROM ngoi c. RAM trong d. RAM

ngoi

92.Thanh ghi DPTR l mt thanh ghi:a. 4 bit b. 8 bit c. 16 bit d. 32 bit

93.Chip 8051 c bao nhiu port xut nhp d liu di dng song song:a. 1 b. 2 c. 3 d. 4

94.Chn nhn d liu ca port ni tip:a. TXD b. RXD c. INT0 d. T0

95.Khi b nh thi trong chip 8051 ng vai tr l b m s kin(Counter) th n s nhn

xung nhp t chn no ?

a. TXD b. RXD c. INT0 d. T0

96.Chn pht d liu ca port ni tip:a. TXD b. RXD c. INT0 d. T0

97. nhn bit c tn hiu ngt t ngun bn ngoi hay khng thchip 8051 s dng chn

no ?

a. TXD b. RXD c. INT0 d. T0

98.Thanh ghi iu khin ch hot ng ca b nh thi trong chip 8051:a. TIMER0 b. TIMER1 c. TMOD d. TCON

99.Thanh ghi iu khin trng thi v qu trnh hot ng ca b nh thi trongchip 8051:

a. TIMER0 b. TIMER1 c. TMOD d. TCON

100. ch ngun gim (Power down) th in p chn Vcc cachip 8051 l bao nhiu

volt?


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a. 2V b. 3V c. 4V d. 5V

101. ch ngh (Idle) th in p chn Vcc ca chip 8051 l bao nhiu volt?a. 2V b. 3V c. 4V d. 5V

102. Nu thch anh dao ng gn bn ngoi chip 8051 c tn s l12MHz th mt chu k

my di:

a. 12 s b. 6 s c. 2 s d. 1 s

103. Lnh nhy no trong s cc lnh sau y c tm nhy n phi trong cng khi 2KB

ca b nh chng trnh:

a.SJMP b. AJMP c. LJMP d. RJMP.

104. Lnh nhy no trong s cc lnh sau y c tm nhy n l btc ni no trong khng

gian b nh chng trnh 64KB.

a. SJMP b. AJMP c. LJMP d. RJMP

105. Lnh nhy no trong s cc lnh sau y c tm nhy n l 128byte trc lnh v 127

byte sau lnh:

a. SJMP b. AJMP c. LJMP d. RJMP.106. Lnh no trong s cc lnh sau y l lnh sai:a. INC A b. DEC A c. INC DPTR d. DEC

DPTR

107. Lnh nhy n a ch rel nu ni dung thanh cha (thanh ghi A) khc 0:a. JNZ rel b. JZ rel c. JNC rel d. JC rel.

108. Lnh nhy n a ch rel nu ni dung c 0 (c zero) bng 0:a. JNZ rel b. JZ rel c. JNC rel d. JC rel.109. Lnh nhy n a ch rel nu ni dung c 0 (c zero) bng 1:a. JNZ rel b. JZ rel c. JNC rel d. JC rel.

110. Lnh nhy n a ch rel nu ni dung thanh cha (thanh ghi A) bng 0:a. JNZ rel b. JZ rel c. JNC rel d. JC rel.

111. Lnh nhy n a ch rel nu ni dung c nh bng 0:a. JNZ rel b. JZ rel c. JNC rel d. JC rel


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112. Lnh nhy n a ch rel nu ni dung c nh khc 0:a. JNZ rel b. JZ rel c. JNC rel d. JC rel

113. Lnh no trong s cc lnh sau y s dng kiu nh a ch trc tip choton hng

ngun:

a. MOV R0, #00H b. MOV 00H, R0

c. MOV R0, 00H d. MOV 00H, @R0

114. Lnh no trong s cc lnh sau y s dng kiu nh a ch gin tip choton hng

ngun:



115. Lnh no trong s cc lnh sau y s dng kiu nh a ch thanh ghicho ton hng

ngun:



116. Lnh no trong s cc lnh sau y s dng kiu nh a ch tc thi choton hng

ngun:



117. Lnh no trong s cc lnh sau y s dng kiu nh a ch tng i:a. SJMP rel b. ACALL rel c. LCALL rel d. MOV

A, @A+DPTR

118. Lnh no trong s cc lnh sau y s dng kiu nh a ch tuyt i:a. SJMP rel b. ACALL rel c. LCALL rel d. MOV

A, @A+DPTR


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119. Lnh no trong s cc lnh sau y s dng kiu nh a ch di:a. SJMP rel b. ACALL rel c. LCALL rel d. MOV

A, @A+DPTR

120. Lnh no trong s cc lnh sau y s dng kiu nh a ch ch s:


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a. SJMP rel b. ACALL rel c.

LCALL rel

121. Lnh no trong s cc lnh sau y l lnh sai:a. MOV A, #05H b.

MOV A, #0FFHc. MOV A, #35 d.

MOV A, #FF0H sai do thiu s 0

122. Lnh no trong s cc lnh sau y l lnhsai:

a. MOV A, #0FFH

b. MOV 255, A

c. MOV #255, A d.MOV A, #255

123. Lnh no trong s cc lnh sau y l lnh sai:a. MOV A, ACC

b. MOV A, PSW

c. MOV A, TH0 d.

MOV A, SBUF

124. Lnh no trong s cc lnh sau y llnh sai:a. POP A b. POP DPL

c. POP SP

d. MOV A, @A+DPTR

d.POP R0


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125. Lnh no trong s cc lnh sau y thuc nhm lnh s hc ca chip 8051:a. INC b. SWAP c. XCH d. CPL

126. Lnh no trong s cc lnh sau y thuc nhm lnh logic ca chip 8051:a. INC cng 1 b. SWAP tro ND c. XCH tro ND d. CPL

x l127. Lnh no trong s cc lnh sau y thuc nhm lnh di chuyn d liu cachip 8051:

a. INC b. SWAP c. XCH d. CPL

128. Lnh no trong s cc lnh sau y thuc nhm lnh x l bit ca chip8051:

a. INC b. SWAP c. XCH d. CPL

129. Lnh no trong s cc lnh sau y thuc nhm lnh r nhnh ca chip8051:

a. INC b. MOV c. CJNE d. SWAP

130. Lnh no trong s cc lnh sau y l lnh sai:a. MOV A, #0B0H b. MOV B0H, A

c. MOV #0B0H, A d. MOV A, B0H



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9

131. Lnh di chuyn ni dung ca thanh ghi R0 vo thanh ghi A:a. MOV R0, A b. MOV A, R0 c. MOVX A, R0 d. MOV

A, @R0

132. Lnh so snh ni dung ca nh 3FH vi ni dung ca thanh ghi A vnhy n a ch

rel nu ni dung ca chng khng bng nhau:

a. CJNE A, #3FH, rel b. CJNE #3FH, A, rel

c. CJNE A,3FH, rel d. CJNE 3FH, A, rel

133. Lnh so snh ni dung ca nh 00H vi mt hng s c gi tr 00H vnhy n a

ch rel nu ni dung ca chng khng bng nhau ( ch mc nh):

a. CJNE R0, #00H, rel b. CJNE 00H, R0, rel

c. CJNE R0, 00H, rel d. CJNE #00H, R0, rel

134. Lnh gim ni dung ca thanh ghi R0 v nhy n a ch rel nu ni dungca thanh

ghi R0 khc 0 ( ch mc nh):

a. CJNE R0, #00H, rel b. DJNZ R0, rel

c. CJNE R0, 00H, rel so snh d. DJNZ rel, R0

135. Lnh so snh ni dung ca thanh ghi R0 vi mt hng s c gi tr 00H vnhy n a

ch rel nu ni dung ca chng khng bng nhau ( ch mc nh):

a. CJNE R0, #00H, rel b. CJNE 00H, R0, rel

c. CJNE R0, 00H, rel d. CJNE #00H, R0, rel

136. Lnh ct d liu vo vng nh ngn xp (Stack):a. POP b. PUSH c. PULL d. SWAP

137. Lnh ly d liu ra t vng nh ngn xp (Stack):a. POP b. PUSH c. PULL d. SWAP

138. Lnh hon chuyn ni dung ca hai nibble (hai na 4 bit) ca thanh ghi A:


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a. POP b. PUSH c. PULL d. SWAP

139. Lnh di chuyn gi tr 7FH vo nh c a ch 7FH:a. MOV 7FH, 7FH b. MOV #7FH, #7FH

c. MOV 7FH, #7FH d. MOV #7FH, 7FH

140. Cho bit trng thi cc c sau khi chip 8051 thc hin php ton s hc(52H + 12H)

a. CY = 0, AC = 0 b. CY = 0, AC = 1

c. CY = 1, AC = 0 d. CY = 1, AC = 1


a. CY = 0, AC = 0 b. CY = 0, AC = 1

c. CY = 1, AC = 0 d. CY = 1, AC = 1142. Cho bit trng thi cc c sau khi chip 8051 thc hin php ton s hc(C3H + AAH)

a. CY = 0, AC = 0 b. CY = 0, AC = 1

c. CY = 1, AC = 0 d. CY = 1, AC = 1

143. Cho bit trng thi cc c sau khi chip 8051 thc hin php ton s hc(C5H + B6H)

a. CY = 0, AC = 0 b. CY = 0, AC = 1c. CY = 1, AC = 0 d. CY = 1, AC = 1

144. Cho bit trng thi cc c sau khi chip 8051 thc hin php ton s hc(00H - 01H)

a. CY = 0, AC = 0 b. CY = 0, AC = 1

c. CY = 1, AC = 0 d. CY = 1, AC = 1

145. Cho bit trng thi cc c sau khi chip 8051 thc hin php ton s hc(83H + 49H)a. AC = 0, OV = 0 b. AC = 0, OV = 1

c. AC = 1, OV = 0 d. AC = 1, OV = 1

146. Cho bit trng thi cc c sau khi chip 8051 thc hin php ton s hc(B4H + 8BH)

a. AC = 0, OV = 0 b. AC = 0, OV = 1

c. AC = 1, OV = 0 d. AC = 1, OV = 1


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10

147. Cho bit trng thi cc c sau khi chip 8051 thc hin php ton s hc(A7H + 2FH)

a. AC = 0, OV = 0 b. AC = 0, OV = 1

c. AC = 1, OV = 0 d. AC = 1, OV = 1

148. Cho bit trng thi cc c sau khi chip 8051 thc hin php ton s hc(25H + 7DH)

a. AC = 0, OV = 0 b. AC = 0, OV = 1

c. AC = 1, OV = 0 d. AC = 1, OV = 1


a. AC = 0, P = 0 b. AC = 0, P = 1

c. AC = 1, P = 0 d. AC = 1, P = 1

150. Cho bit trng thi cc c sau khi chip 8051 thc hin php ton s hc(AAH + BDH)

a. AC = 0, P = 0 b. AC = 0, P =1

c. AC = 1, P = 0 d. AC = 1, P = 1

151. Cho bit trng thi cc c sau khi chip 8051 thc hin php ton s hc(FFH + 01H)

a. AC = 0, P = 0 b. AC = 0, P =1

c. AC = 1, P = 0 d. AC = 1, P =1

152. Cho bit trng thi cc c sau khi chip 8051 thc hin php ton s hc(56H + AAH)

a. AC = 0, P = 0 b. AC = 0, P =1

c. AC = 1, P = 0 d. AC = 1, P =1

153. Cho bit trng thi cc c sau khi chip 8051 thc hin php ton s hc(22H + B5H)

a. OV = 0, CY = 0 b. OV = 0, CY = 1c. OV = 1, CY = 0 d. OV = 1, CY = 1


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154. Cho bit trng thi cc c sau khi chip 8051 thc hin php ton

s hc (F7H + C5H)

a. OV = 0, CY = 0 b. OV = 0, CY = 1

c. OV = 1, CY = 0 d. OV = 1, CY = 1

155. Cho bit trng thi cc c sau khi chip 8051 thc hin php tons hc (5FH + 5BH)

a. OV = 0, CY = 0 b. OV = 0, CY = 1

c. OV = 1, CY = 0 d. OV = 1, CY = 1


s hc (C3H + AAH)

a. OV = 0, CY = 0 b. OV = 0, CY = 1

c. OV = 1, CY = 0 d. OV = 1, CY = 1157. Cho bit trng thi cc c sau khi chip 8051 thc hin php ton

s hc (53H+12H)

a. CY = 0, AC = 0 b. CY = 0, AC = 1

c. CY = 1, AC = 0 d. CY = 1, AC = 1


s hc (92H+89H)

a. CY = 0, AC = 0 b. CY = 0, AC = 1c. CY = 1, AC = 0 d. CY = 1, AC = 1


s hc (12H+25H)

a. CY = 0, AC = 0 b. CY = 0, AC = 1

c. CY = 1, AC = 0 d. CY = 1, AC = 1


s hc (24H-89H)a. CY = 0, AC = 0 b. CY = 0, AC = 1

c. CY = 1, AC = 0 d. CY = 1, AC = 1


s hc (12H+ACH)

a. CY = 0, OV = 0 b. CY = 0, OV = 1

c. CY = 1, OV = 0 d. CY = 1, OV = 1


s hc (56H+6FH)

a. CY = 0, OV = 0 b. CY = 0, OV = 1


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c. CY = 1, OV = 0 d. CY = 1, OV = 1



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11

163.Cho bit trng thi cc c sau khi chip 8051 thc hin php ton s hc

(89H-FEH)

a. CY = 0, OV = 0 b. CY = 0, OV = 1

c. CY = 1, OV = 0 d. CY = 1, OV = 1


(1FH+CDH)

a. CY = 0, OV = 0 b. CY = 0, OV = 1

c. CY = 1, OV = 0 d. CY = 1, OV = 1


(FFH+01H)

a. CY = 0, AC = 0 b. CY = 0, AC = 1

c. CY = 1, AC = 0 d. CY = 1, AC = 1


(56H+9FH)

a. CY = 0, AC = 0 b. CY = 0, AC = 1

c. CY = 1, AC = 0 d. CY = 1, AC = 1


(4DH+B3H)

a. CY = 0, AC = 0 b. CY = 0, AC = 1

c. CY = 1, AC = 0 d. CY = 1, AC = 1


(92H+6EH)

a. CY = 0, AC = 0 b. CY = 0, AC = 1

c. CY = 1, AC = 0 d. CY = 1, AC = 1


(ADH+45H)

a. CY = 0, P = 0 b. CY = 0, P = 1c. CY = 1, P = 0 d. CY = 1, P =1


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(56H-DAH)

a. CY = 0, P = 0 b. CY = 0, P =1

c. CY = 1, P = 0 d. CY = 1, P = 1

171.Cho bit trng thi cc c sau khi chip 8051 thc hin php ton s hc(69H-96H)

a. CY = 0, P = 0 b. CY = 0, P =1

c. CY = 1, P = 0 d. CY = 1, P =1


(12H+FEH)

a. CY = 0, P = 0 b. CY = 0, P =1

c. CY = 1, P = 0 d. CY = 1, P = 1173.Cho bit trng thi cc c sau khi chip 8051 thc hin php ton s hc

(12H-65H)

a. AC = 0, OV = 0 b. AC = 0, OV = 1

c. AC = 1, OV = 0 d. AC = 1, OV = 1


(65H+99H)

a. AC = 0, OV = 0 b. AC = 0, OV = 1c. AC = 1, OV = 0 d. AC = 1, OV = 1


(77H+98H)

a. AC = 0, OV = 0 b. AC = 0, OV = 1

c. AC = 1, OV = 0 d. AC = 1, OV = 1


(92H+89H)a. AC = 0, OV = 0 b. AC = 0, OV = 1

c. AC = 1, OV = 0 d. AC = 1, OV = 1


(35H-56H)

a. AC = 0, P = 0 b. AC = 0, P =1

c. AC = 1, P = 0 d. AC = 1, P = 1


(65H+01H)

a. AC = 0, P = 0 b. AC = 0, P =1


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c. AC = 1, P = 0 d. AC = 1, P =1



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12


s hc (12H+55H)

a. AC = 0, P = 0 b. AC = 0, P = 1

c. AC = 1, P = 0 d. AC = 1, P =1


s hc (02H-89H)

a. AC = 0, P = 0 b. AC = 0, P =1

c. AC = 1, P = 0 d. AC = 1, P = 1


s hc (23H+56H)

a. AC = 0, OV = 0 b. AC = 0, OV = 1

c. AC = 1, OV = 0 d. AC = 1, OV = 1


s hc (65H+89H)

a. AC = 0, OV = 0 b. AC = 0, OV = 1

c. AC = 1, OV = 0 d. AC = 1, OV = 1


s hc (13H+45H)

a. AC = 0, OV = 0 b. AC = 0, OV = 1

c. AC = 1, OV = 0 d. AC = 1, OV = 1


s hc (54H+89H)

a. AC = 0, CY = 0 b. AC = 0, CY = 1

c. AC = 1, CY = 0 d. AC = 1, CY = 1


s hc (ADH-8FH)

a. OV = 0, AC = 0 b. OV = 0, AC = 1c. OV = 1, AC = 0 d. OV = 1, AC = 1


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s hc (89H+CBH)

a. OV = 0, AC = 0 b. OV = 0, AC = 1

c. OV = 1, AC = 0 d. OV = 1, AC = 1

187. Cho bit trng thi cc c sau khi chip 8051 thc hin php tons hc (94H+89H)

a. OV = 0, AC = 0 b. OV = 0, AC = 1

c. OV = 1, AC = 0 d. OV = 1, AC = 1


s hc (65H+89H)

a. OV = 0, CY = 0 b. OV = 0, CY = 1

c. OV = 1, CY = 0 d. OV = 1, CY = 1189. Cho bit trng thi cc c sau khi chip 8051 thc hin php ton

s hc (DFH-54H)

a. OV = 0, P = 0 b. OV = 0, P = 1

c. OV = 1, P = 0 d. OV = 1, P = 1


s hc (68H-DEH)

a. OV = 0, P = 0 b. OV = 0, P = 1c. OV = 1, P = 0 d. OV = 1, P =1


s hc (12H+45H)

a. OV = 0, P = 0 b. OV = 0, P = 1

c. OV = 1, P = 0 d. OV = 1, P = 1


s hc (21H-68H)a. OV = 0, P = 0 b. OV = 0, P =1

c. OV = 1, P = 0 d. OV = 1, P = 1


s hc (BCH+AAH)

a. CY = 0, P = 0 b. CY = 0, P =1

c. CY = 1, P = 0 d. CY = 1, P =1


s hc (CDH-98H)

a. CY = 0, P = 0 b. CY = 0, P =1


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c. CY = 1, P = 0 d. CY = 1, P =1



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13

195. Cho bit trng thi cc c sau khi chip 8051 thc hin php ton s hc(65H-DCH)

a. CY = 0, P = 0 b. CY = 0, P = 1

c. CY = 1, P = 0 d. CY = 1, P = 1

196. Cho bit trng thi cc c sau khi chip 8051 thc hin php ton s hc(FFH+01H)

a. CY = 0, P = 0 b. CY = 0, P = 1

c. CY = 1, P = 0 d. CY = 1, P = 1

197. Kh nng fanout ca cc port 1, 2 v 3 trong chip 8051 l:a. 1 ti TTL b. 2 ti TTL c. 4 ti TTL d. 8 ti

TTL

198. Kh nng fanout ca cc port 0 trong chip 8051 l:a. 1 ti TTL b. 2 ti TTL c. 4 ti TTL d. 8 ti

TTL

199. Cc c c dng ch th tnh trng nh ca CPU:

a. C nh CF b. C chiu IF c. C trn OF d. C

TFO, TF1

200. Cng dng ca thanh ghi SP:

a. Cha a ch ca d liu hin ang nh ngn xp.

b. Cha a ch ca lnh k tip c thi hnh

c. Cha d liu ca qu trnh tnh ton.

d. Ch vo mt a ch trong b nh.

201. Phng php xc nh hnh thc truy xut ca mt ton hng

c gi l:

a. Mode a ch b. a ch assembler.

c. M lnh d. M gi nh

202. Mt lnh y ca ngn ng assembly gm cc phn (xp theo

th t):


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14

211. Nu dng mt thit b ngoi vi c dung lng l8 KB th cnphi truy xut bao nhiu

ng a ch:

a. A0.. A10 b. A0.. A11 c. A0.. A12 d. A0..

A13


ng a ch:

a. A0.. A10 b. A0.. A11 c. A0.. A12 d. A0..

A13


ng a ch:

a. A0.. A10 b. A0.. A11 c. A0.. A12 d. A0..

A13


ng a ch:

a. A0.. A10 b. A0.. A11 c. A0.. A12 d. A0..

A13

215. Cng dng ca con tr lnh l:a. Cha a ch u ca on ngn xp.

b. Gi a ch ca lnh k tip s c thc hin.

c. Tr vo 1 a ch trong b nh.

d. Cha d liu.

216. Kiu nh a ch ca chip 8051, trong cc ton hng u lthanh ghi Rn c gi

l:


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a. a ch tc thi b. a ch thanh ghi

c. a ch trc tip b nh d. a ch tng i

217. Lnh sau MOV@DPTR, A s dng mode a ch:a. a ch gin tip b nh b. a ch thanh ghi

c. a ch tng i d. a ch tc thi218. Lnh assembly ca 8051 INC A s cng thm 1 vo:a. Thanh ghi tch lu A b. Thanh ghi tch lu B

c. Thanh ghi DPTR c. Thanh ghi IP

219. Lnh assembly ca 8051 MOV A, B s:a. Np gi tr 0AH vo thanh ghi B

b. Np gi tr 0BH vo thanh ghi A

c. Sao chp ni dung ca thanh ghi A vo thanh ghi Bd. Sao chp ni dung ca thanh ghi B vo thanh ghi A

220. Lnh assembly ca 8051 dng copy ni dung ca nh c a ch 85Hvo thanh ghi

a.

a. MOV A, #85H b. MOV #85H, A

c. MOV A, 85H d. MOV 85H, A

221. Lnh assembly ca 8051 MOV DPTR, #1000H s:a. Np gi tr 00H vo thanh ghi DPH v 10H vo thanh ghi DPL

b. Np gi tr 10H vo thanh ghi DPH v 00H vo thanh ghi DPL

c. Sao chp ni dung ca thanh ghi DPTR vo nh c a ch 1000H

d. Sao chp ni dung ca nh c a ch 1000H vo

thanh ghi DPTR 222. Lnh c b nh d liu ngoi:


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a. MOVX A, @DPTR

c. MOV A, DPTR

223. Lnh ghi ra b nh d liungoi:

a. MOVX A, @DPTRc. MOV A, DPTR

b. MOVX @DPTR, A

c. MOV @DPTR, A

b. MOVX

@DPTR,A

c. MOV

@DPTR,

A


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224. Cc ng tn hiu dng xc nh v tr ca mt nh:a. RD, WR b. Vcc, GND c. D0..D7 d.

A0..A15



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15

225. Cc ng tnh hiu sau ca chip 8051 l loi multiplex:

a. P2.[0..7] b. P1.[0..7] c. P0.[0..7] d. C hai cu a v

c u ng

226. t bit 67H (lm cho bit 67H nhn gi tr 1) ta dng lnh:

a. SETB 67H

b. MOV A, 2CH

ORL A, # 80H

MOV 2CH, A

c. MOV A, #67H

d. C hai cu a v b u ng.

227. B nh RAM trn chip 8051 gm c:

a. RAM a chc nng

b. Cc dy thanh ghi

c. RAM nh a ch bit

d. C ba cu a, b, c u ng.

228. Lnh MOV A, #0H lm cho c:

a. CY = 1 b. AC = 0 c. F0 = 1 d. OV = 1

229. Cc tn hiu vo ca mch gii m a ch gm c:

a. Cc ng ca P0, P1

b. Cc ng ca P0, P2

c. Cc ng ca P3

d. C ba cu a, b, c u ng

230. Trong mode a ch tc thi c ton hng l gi tr d liu nm

:

a. Ton hng th nht b. Ton hng th hai

c. M lnh d. C ba cu a, b, c u ng

231. Chng trnh con l:a. on chng trnh thc hin 1 cng vic v kt thc bng lnh RET


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b. on chng trnh thc hin 1 cng vic v kt thc bng lnh END

c. C th c gi nhiu ni trong chng trnh chnh

d. C hai cu a v c u ng.

232. Cc c c dng ch th tnh trn ca Timer l:

a. C trn OF b. C chiu IF c. C trn CF d. CTFO, TF1

233. Lnh MOV A, B dng:

a. Mode a ch thanh ghi b. Mode a ch tc thi

c. Mode a ch trc tip d. Mode a ch gin tip

234. Mch gii m a ch l:

a. Mch tnh a ch vt l 20 bit

b. Mch m ho d liu BCD ra led 7 onc. Mch to xung chn chip (CS), xc nh vng a ch b nh hay ngoi vi

trong h vi

x l

d. C ba cu a, b, c u ng.

235. Vi iu khin 8051 c cc port xut nhp sau:a. P0, P1, P2, P3

b. AD0 .. AD7c. PSEN

d. ALE

236. Cho on m Assembler sau:MOV A, #55H

SUBB A, #56H (SUBB l lnh tr )

Kt qu ca thanh ghi A l:

a. 00H b. FEH c. FFH d. Khngxc nh



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16


LOOP: DEC A

JZ LOOP (nhy nu =0)

END


a. 55H b. 56H c. 54H d. 0H


LOOP: DEC A dec= bt 1

JNZ LOOP jnz = nhy nu khc 0

END


a. 25H b. 26H c. 24H d. 0H

239. Cho on m Assembler sau:

MOV A, #77H

MOV B, #07H

DIV AB div l lnh chia ,kt qu lu vo A, d

lu vo B


a. 11H b. 12H c. 7H d. 0H


MOV A, #77H

MOV B, #07H

DIV AB

Kt qu ca thanh ghi B l:

a. 11H b. 12H c. 7H d. 0H



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MOV A, #0F0H

MOV B, #0E2H

ORL A, B ORL lnh or hai ton hng


a. E2H b. F2H c. FFH d.F0H242. Cho on m Assembler sau:

MOV A, #0F0H

MOV B, #0E2H

ORL A,B


a. E2H b. F2H c. FFH d.F0H


MOV R1, #0F0H

MOV @R1, A

MOV A, @R1


a. 60H b. 06H c. F0H d. 30H



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17


MOV R1, #0F0H

MOV @R1, A

MOV A, @R1

Kt qu ca thanh ghi R1 l:

a. 60H b. 06H c. F0H d. 30H


MOV B, #10H

MUL AB lnh nhn byte thp lu vo A ,byte cao

lu vo B


a. 22H b. 10H c. 20H d. 02H


MOV A, #22H

MOV B, #10H

MUL AB


a. 22H b. 10H c. 20H d. 02H


MOV A, #0H

DEC A


a. 0H b. 1H c. FFH d. Khng

xc nh


MOV A, #0FFH


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INC A


a. 0H b. FEH c. FFH d. Khng

xc nh

249. Cho on m Assembler sau:MOV A, #0FFH

ADD A, #2H


a. 0H b. 1H c. FFH d. Khng

xc nh


MOV P3, #55HCLR P3.2

Kt qu ca thanh ghi P3 l:

a. 55H b. 56H c. 54H d. 51H


MOV P1, #0FFH

CLR P1.0

Kt qu ca thanh ghi P1 l:a. 0H b. FEH c. FFH d. Khng

xc nh


MOV P2, #00H

CPL P2.1

CPL P2.0

Kt qu ca thanh ghi P2 l:a. 5H b. 4H c. 3H d. 1H



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18

253. Cho on m Assembler sau:MOV A, #0F4H

MOV B, #0FH

ADD A,B


a. 5H b. F4H c. 3H d. FH


MOV B, #0FH

ADD A,B


a. 5H b. F4H c. 3H d. FH


MOV P2, #0FFH

CPL P2.0


a. 0H b. FEH c. FFH d. Khng

xc nh


CLR C

MOV A, #0FFH

MOV B, #05H

SUBB A,B


a. 4H b. FEH c. FAH d. Khng

xc nh


CLR C


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MOV A, #0FFH

MOV B, #05H

SUBB A,B


a. 4H b. FEH c. FAH d. 5H258. Cho on m Assembler sau:

MOV R1, #0F0H

MOV @R1, #0FH

MOV A, #0F0H

ADD A, @R1


a. 0H b. FEH c. FFH d. F0H259. Cho on m Assembler sau:

MOV R1, #0F0H

MOV @R1, #0FH

MOV A, #0F0H

ADD A, @R1


a. 0H b. FEH c. FFH d. F0H



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19

260. Cho on m Assembler sau:MOV A, #0C3H

MOV R0, #0AAH

ADD A, R0


a. C3H b. AAH c. 6DH d. 6BH


MOV R0, #0AAH

ADD A, R0


a. C3H b. AAH c. 6DH d. 6BH


MOV A, #0C3H

MOV R0, #0AAH

ADD A, R0

Kt qu ca c l:

a. CY = 0, AC = 0 b. CY = 0, AC = 1

c. CY = 1, AC = 0 c. CY = 1, AC = 1


MOV A, #0C3H

MOV R0, #0AAH

ADD A, R0

Kt qu ca c l:

a. AC = 0, OV = 0 b. AC = 0, OV = 1

c. AC = 1, OV = 0 d. AC = 1, OV = 1


MOV A, #93H


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MOV R0, #77H

ADD A, R0

ADDC A, R0


a. 93H b. 77H c. 82H d. 0AH265. Cho on m Assembler sau:

MOV A, #93H

MOV R0, #77H

ADD A, R0

ADDC A, R0


a. 93H b. 77H c. 82H d. 0AH266. Cho on m Assembler sau:

MOV A, #0C3H

MOV R0, #55H

ANL A, R0


a. C3H b. 55H c. 41H d. D7H



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20


MOV R0, #55H

ANL A, R0


a. C3H b. 55H c. 41H d. D7H


ANL A, #0FH


a. F0H b. 0FH c. 00H d. FFH


MOV A, #0F0H

ORL A, #0FH




MOV A, #0FFH

MOV R0, #0F0H

XRL A, R0




MOV A, #0FFH

MOV R0, #0F0H

XRL A, R0




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MOV R0, #7FH

MOV 7EH, #00H

MOV 7FH, #40H

DEC @R0DEC R0

DEC @R0


a. 7FH b. 7EH c. FFH d. 3FH


MOV R0, #7FH

MOV 7EH, #00HMOV 7FH, #40H

DEC @R0

DEC R0

DEC @R0

Kt qu ca nh c a ch 7EH v 7FH l:

a. ( 7EH ) = 00H, ( 7FH ) = 40H

b. ( 7EH ) = FFH, ( 7FH ) = 3FHc. ( 7EH ) = 3FH, ( 7FH ) = FFH

d. ( 7EH ) = 40H, ( 7FH ) = 00H



54/146


21

274. Cho on m Assembler sau:SETB C

MOV A, #0C9H

MOV R2, #54H

SUBB A, R2


a. C9H b. 54H c. 74H d. 75H


MOV A, #0C9H

MOV R2, #54H

SUBB A, R2


a. C9H b. 54H c. 74H d. 75H


MOV A, #0C5H

SWAP A

ADD A, #32H


a. C5H b. 32H c. E8H d. 8EH


MOV R0, #20H

MOV A, #3FH

MOV 20H, #75H

XCH A, @R0


a. 20H b. 3FH c. 75H d. 57H



55/146

MOV R0, #20H

MOV A, #36H

MOV 20H, #75H

XCHD A, @R0

Kt qu ca thanh ghi A l:a. 76H b. 35H c. 36H d. 75H

279. Khi lp trnh cho ROM bn trong chip 8051, ngun in Vpp

cung cp l:

a. Vpp = 5V b. Vpp = 12,5V c. Vpp = 21V d. Vpp =

0V

280. vng nh ca ngn xp (stack) c a ch bt u l 40H th

thanh ghi SP phi c gitr l:

a. 39H b. 3FH c. 40H d. 41H


MOV 20H, #77H

ADD A, 20H

ADDC A, 20HKt qu ca thanh ghi A l:

a. C3H b. 77H c. 20H d. B2H



56/146


22


MOV 20H, #77H

ADD A, 20H

ADDC A, 20H

Kt qu ca nh c a ch 20H l:

a. C3H b. 77H c. 20H d. B2H

283. Cho on m Assembler sau:MOV A, #0ABH

CLR C

ADDC A, #0BAH


a. ABH b. BAH c. 65H d. 66H


MOV A, #7FH

MOV R0, #26H

MOV 26H, #0AAH

ADD A, 26H

ADDC A, @R0


a. D4H b. D3H c. 7FH d. 26H


MOV A, #7FH

MOV R0, #26H

MOV 26H, #0AAH

ADD A, 26H

ADDC A, @R0



57/146

a. D4H b. D3H c. 7FH d. 26H


MOV A, #7FH

MOV R0, #26H

MOV 26H, #0AAHADD A, 26H

ADDC A, @R0


a. 7FH b. D3H c. AAH d. 26H


SETB C

MOV A, #56HMOV 66H, #76H

MOV R0, #66H

SUBB A, @R0


a. 66H b. E0H c. 56H d. DFH



58/146


23


MOV A, #56H

MOV 66H, #76H

MOV R0, #66H

SUBB A, @R0


a. 66H b. E0H c. 56H d. DFH


MOV A, #56H

MOV 66H, #76H

MOV R0, #66H

SUBB A, @R0


a. 56H b. 66H c. 76H d. DFH


MOV R0, #7EH

MOV 7EH, #00H

MOV 7FH, #40H

INC @R0

INC R0

INC @R0


a. 7FH b. 01H c. 41H d. 80H


MOV R0, #7EH

MOV 7EH, #00H


59/146

MOV 7FH, #40H

INC @R0

INC R0

INC @R0

Kt qu ca nh c a ch 7EH l:a. 00H b. 01H c. 02H d. 03H


MOV R0, #7EH

MOV 7EH, #00H

MOV 7FH, #40H

INC @R0

INC R0INC @R0

Kt qu ca nh c a ch 7FH l:

a. 43H b. 42H c. 41H d. 40H



60/146


24

293. Cho on m Assembler sau:MOV R0, #7FH

MOV 7EH, #00H

MOV 7FH, #40H

DEC @R0

DEC R0

DEC @R0




MOV 7EH, #00H

MOV 7FH, #40H

DEC @R0

DEC R0

DEC @R0

Kt qu ca nh c a ch 7EH l:



MOV R0, #7FH

MOV 7EH, #00H

MOV 7FH, #40H

DEC @R0

DEC R0

DEC @R0





61/146

MOV R0, #7EH

MOV 7EH, #55H

MOV 7FH, #4FH

INC R0

MOV A, 7EHORL A, @R0

MOV R0, A

ORL A, 7EH


a. 5FH b. 55H c. 4FH d. 7EH


MOV R0, #7EHMOV 7EH, #55H

MOV 7FH, #4FH

INC R0

MOV A, 7EH

ORL A, @R0

MOV R0, A

ORL A, 7EHKt qu ca nh c a ch 7FH l:




62/146


25

298. Cho on m Assembler sau:MOV R0, #7EH

MOV 7EH, #55H

MOV 7FH, #4FH

INC R0

MOV A, 7EH

ORL A, @R0

MOV R0, A

ORL A, 7EH




MOV 7EH, #55H

MOV 7FH, #4FH

INC R0

MOV A, 7EH

ORL A, @R0

MOV R0, A

ORL A, 7EH




MOV R0, #7FH

MOV 7EH, #0ADH

MOV 7FH, #26H

DEC R0

MOV A, 7FH


63/146

XRL A, @R0

MOV R0, A

XRL A, 7FH


a. 26H b. ADH c. 8BH d. 00H301. Cho on m Assembler sau:

MOV R0, #7FH

MOV 7EH, #0ADH

MOV 7FH, #26H

DEC R0

MOV A, 7FH

XRL A, @R0MOV R0, A

XRL A, 7FH


a. 26H b. ADH c. 8BH d. 00H



64/146


26


MOV 7EH, #0ADH

MOV 7FH, #26H

DEC R0

MOV A, 7FH

XRL A, @R0

MOV R0, A

XRL A, 7FH




MOV 7EH, #0ADH

MOV 7FH, #26H

DEC R0

MOV A, 7FH

XRL A, @R0

MOV R0, A

XRL A, 7FH




MOV R0, #7EH

MOV 7EH, #55H

MOV 7FH, #4FH

INC R0

MOV A, 7EH


65/146

ANL A, @R0

MOV R0, A

ANL A, 7EH


a. 45H b. 55H c. 4FH d. 7EH305. Cho on m Assembler sau:

MOV R0, #7EH

MOV 7EH, #55H

MOV 7FH, #4FH

INC R0

MOV A, 7EH

ANL A, @R0MOV R0, A

ANL A, 7EH


a. 45H b. 55H c. 4FH d. 7EH



66/146


27


MOV 7EH, #55H

MOV 7FH, #4FH

INC R0

MOV A, 7EH

ANL A, @R0

MOV R0, A

ANL A, 7EH


a. 45H b. 55H c. 4FH d. 7EH


MOV 7EH, #55H

MOV 7FH, #4FH

INC R0

MOV A, 7EH

ANL A, @R0

MOV R0, A

ANL A, 7EH


a. 45H b. 55H c. 4FH d. 7EH


MOV A, #0F0H

XRL A, #0FH


a. F0H b. FFH c. 0FH d. 00H



67/146

MOV A, #5AH

MOV 5AH, A

ANL 5AH, #0BDH

CPL A

ANL 5AH, AKt qu ca thanh ghi A l:

a. 5AH b. A5H c. 00H d. BDH


MOV A, #5AH

MOV 5AH, A

ANL 5AH, #0BDH

CPL AANL 5AH, A

Kt qu ca nh c a ch 5AH l:

a. 5AH b. A5H c. 00H d. BDH



68/146


28

311. Cho on m Assembler sau:MOV A, #5AH

MOV 5AH, A

ORL 5AH, #22H

CPL A

ORL 5AH, A


a. 00H b. FFH c. 5AH d. A5H

312. Cho on m Assembler sau:MOV A, #5AH

MOV 5AH, A

ORL 5AH, #22H

CPL A

ORL 5AH, A


a. 00H b. FFH c. A5H d. 5AH


MOV A, #5AH

MOV 5AH, A

XRL 5AH, #0DBH

CPL A

XRL 5AH, A


a. 5AH b. A5H c. 42H d. 24H


MOV A, #5AH

MOV 5AH, A

XRL 5AH, #0DBH


69/146

CPL A

XRL 5AH, A


a. 5AH b. A5H c. 42H d. 24H


RL A


a. 8AH b. 8BH c. 62H d. E2H


MOV A, #0C5H

RR AKt qu ca thanh ghi A l:

a. 8AH b. 8BH c. 62H d. E2H


MOV A, #0B6H

RL A


a. 5BH b. 5CH c. 6DH d. 6CH



70/146


29

318. Cho on m Assembler sau:MOV A, #0B6H

RR A


a. 5BH b. 5CH c. 6DH d. 6CH


ADD A, #7BH

RLC A


a. 66H b. E6H c. 9AH d. 9BH


MOV A, #52H

ADD A, #7BH

RRC A


a. 66H b. E6H c. 9AH d. 9BH


MOV A, #0A3H

ADD A, #0E6H

RLC A


a. 12H b. 13H c. 24H d. C4H


MOV A, #0A3H

ADD A, #0E6H

RRC A



71/146

a. 12H b. 13H c. 24H d. C4H


MOV A, #0C5H

SWAP A

Kt qu ca thanh ghi A l:a. 50H b. 5CH c. 00H d. 0CH


MOV P1, #0ABH

MOV C, P1.0

ANL C, P1.6

MOV P1.5, C

Kt qu ca thanh ghi P1 l:a. 2BH b. 4BH c. 8BH d. ABH


MOV P2, #5DH

MOV C, P2.2

ORL C, P2.4

MOV P2.7, C

Kt qu ca thanh ghi P2 l:a. 5DH b. 7DH c. 9DH d. DDH



72/146


30

326. Cho on m Assembler sau:MOV P1, #0ABH

MOV C, P1.0

ANL C, /P1.6

MOV P1.4, C


a. ABH b. BBH c. CBH d. DBH

327. Cho on m Assembler sau:MOV P2, #5DH

MOV C, P2.1

ORL C, /P2.3

MOV P2.0, C


a. 5AH b. 5BH c. 5CH d. 5DH


MOV P3, #5BH

CPL P3.1

CPL P3.2


a. 5AH b. 5BH c. 5CH d. 5DH


MOV P3, #5BH

CLR P3.6

CPL P3.1

CPL P3.0


a. 18H b. 81H c. 5BH d. B5H



73/146

MOV R0, #00H

WAIT: DJNZ R0, WAIT

MOV A, R0


a. 01H b. FFH c. 00H d. Khngxc nh


MOV R0, #00H

DJNZ R0, WAIT

WAIT: MOV A, R0




MOV R0, #07H

WAIT: DJNZ R0, WAIT

MOV A, R0





74/146


31

333. Cho on m Assembler sau:MOV A, #2FH

MOV R0, #0F2H

ADD A, R0

CJNE A, #00H, DUNG

MOV A, #0FFH

DUNG: MOV R0, #2FH

Kt qu ca thanh ghi A v R0 l:

a. A = 21H, R0 = 2FH b. A = 2FH, R0 = F2H

c. A = FFH, R0 = F2H d. A = FFH, R0 = 2FH

334. Cho on m Assembler sau:MOV A, #0FH

MOV R0, #0F1H

ADD A, R0

CJNE A, #00H, DUNG

MOV A, #0FFH

DUNG: MOV R0, #2FH

Kt qu ca thanh ghi A v R0 l:

a. A = 21H, R0 = 2FH b. A = 2FH, R0 = F2H

c. A = FFH, R0 = F2H d. A = FFH, R0 = 2FH


MOV A, #2BH

MOV R0, #07H

WAIT: INC A

DJNZ RO, WAIT


a. 30H b. 31H c. 32H d. 33H



75/146

MOV A, #0ABH

MOV 20H, #03H

ADD A, 20H

CJNE A, 20H, DUNG

MOV A, #00HDUNG: MOV 20H, #0ABH

Kt qu ca thanh ghi A v 20H l:

a. A = AEH, 20H = 03H b. A = 00H, 20H = ABH

c. A = 00H, 20H = 03H d. A = AEH, 20H = ABH


MOV A, #0ABH

MOV 20H, #03HADD A, #58H

CJNE A, 20H, DUNG

MOV A, #00H

DUNG: MOV 20H, #0ABH

Kt qu ca thanh ghi A v 20H l:

a. A = 00H, 20H = 58H b. A = 03H, 20H = 58H

c. A = 00H, 20H = ABH d. A = 03H, 20H = ABH338. Xung tn hiu ALE c tn s bng . tn s dao ng bn

trong chip vi iu khin:

a. 1/6 b. 1/2 c. 1/12 d. 1



76/146


32

339. Khi thi hnh b nh t b nh m rng chn EA cn c mc:

a. Mc cao (+5V) b. Mc thp (0V)

c. B trng d. C 3 cu u sai

340. Trong cc lnh sau lnh no tng ng:

(1) MOV A, #00010010B

(2) MOV A, #12H

(3) MOV A,#18

a. (1) & (2) b. (2) & (3)

c. (1) & (3) d. (1) & (2) & (3)


MOV 30H, #2EH

MOV R1, #2FH

INC R1

MOV A,@R1

MOV R1, #40H

Kt qu thanh ghi R1 l:

a. 2FH b. 40H c. 2EH d. 30H


MOV 30H, #2EH

MOV R1, #2FH

INC R1

MOV A,@R1

MOV R1, #40H


a. 2FH b. 40H c. 2EH d. 30H


MOV 30H, #0EH

MOV A,#15H


77/146

MOV A, 30H

Kt qu thanh ghi A:

a. 15H b. 30H c. 0EH d. Khng

xc nh.

344. Cho on m Assembler sau:MOV 4BH, #56H

MOV R0, #4AH

MOV A, #14H

INC A

MOV @R0, A

INC R0

MOV A,@R0Kt qu thanh ghi A:

a.4AH b.14H c. 56H d. 15H



78/146


33


MOV R0, #4AH

MOV A, #14H

INC A

MOV @R0, A

INC R0

MOV A,@R0

Kt qu thanh ghi R0:

a.4AH b.4BH c. 56H d. 14H


MOV R0, #4AH

MOV A, #14H

INC A

MOV @R0, A

INC R0

MOV A,@R0

Kt qu thanh ghi 4AH:



MOV 4BH, #56H

MOV R0, #4AH

MOV A, #14H

INC A

MOV @R0, A

INC R0MOV A,@R0


79/146

Kt qu thanh ghi 4BH:



MOV R0, #52H

MOV A, #17H

MOV 53H, A

INC A

MOV @R0, A

INC R0

MOV A,@R0

Kt qu thanh ghi A:

a.53H b.52H c. 17H d. 18H


MOV R0, #52H

MOV A, #17H

MOV 53H, A

INC A

MOV @R0, A

INC R0

MOV A,@R0

Kt qu thanh ghi R0:

a.53H b.52H c. 17H d. 18H



80/146


34

350. Cho on m Assembler sau:MOV R0, #52H

MOV A, #17H

MOV 53H, A

INC A

MOV @R0, A

INC R0

MOV A,@R0

Kt qu thanh ghi 52H:

a.53H b.52H c. 17H d. 18H

351. Cho on m Assembler sau:MOV R0, #52H

MOV A, #17H

MOV 53H, A

INC A

MOV @R0, A

INC R0

MOV A,@R0

Kt qu thanh ghi 53H:

a.53H b.52H c. 17H d. 18H


MOV R0, #52H

MOV A, #17H

INC A

MOV R0, A

INC R0

MOV A,R0

Kt qu thanh ghi A:


81/146

a.53H b.52H c. 19H d. 18H


MOV R0, #52H

MOV A, #17H

INC AMOV R0, A

INC R0

MOV A,R0

Kt qu thanh ghi R0:

a.53H b.52H c. 19H d. 18H

354. khi ng con tr ngn xp (SP) bt u ti a ch 49H ta

dng lnh:a. MOV SP, #50H

b. MOV SP, #49H

c. MOV SP, #48H

d. MOV SP, #4AH


MOV A, #76H

MOV DPTR, #1050HMOVX @DPTR,A

Kt qu:

a. nh a ch 1050H cha 76H b. Thanh ghi DPH cha 10H

c. Thanh ghi DPL cha 50H d. Tt c cc cu u ng.



82/146


35


ADD A, #24H

DA A

Kt qu thanh ghi A v c kim tra chn (P) l:

a. 62H, 1 b. 62H, 0 c. 5CH, 0 d. 5CH, 1


ADD A, #02H

Kt qu thanh ghi A v c kim tra chn (P) l: Lnh tr

a. 4BH, 1 b. 51H, 0 c. 4BH, 0 d. 51H, 1


MOV A, #08H

MOV B, #02H

MUL AB

Kt qu thanh ghi A:

a. 08H b. 00H c. 10H d. 16H


MOV A, #08H

MOV B, #02H

MUL AB

Kt qu thanh ghi B:

a. 08H b. 00H c. 10H d. 16H


MOV A, #11

MOV B, #3

DIV AB


83/146

Kt qu thanh ghi A:

a. 0BH b. 03H c. 02H d. 00H


MOV A, #11

MOV B, #3DIV AB

Kt qu thanh ghi B:

a. 0BH b. 03H c. 02H d. 00H


MOV A, #34

MOV R0, #2

SETB CADDC A, R0


a.34 b. 36 c. 37 d. 68


MOV A, #34

MOV R0, #2

SUBB A, R0Kt qu ca thanh ghi A l:

a. 31 b. 32 c. 34 d. Khng

xc nh.



84/146


36

364. Cho on m Assembler sau:MOV A, #34

ADD A,#0

MOV R0, #2

SUBB A, R0


a. 31 b. 32 c. 34 d. Khng

xc nh.

365. Cho on m Assembler sau:MOV A, #1

MOV R0, #2

ADD A, #255

MOV A,#34

SUBB A, R0


a. 31 b. 32 c. 34 d. Khng

xc nh.


MOV A, #34H

CPL A

RL A


a. 34H b. CBH c. 96H d. 97H


MOV A, #37H

SWAP A

RR A



85/146

a. 0B9H b. 73H c. 0E6H d. 39H


MOV A, #37H

SWAP A

RL AKt qu ca thanh ghi A l:

a. 0B9H b. 73H c. 0E6H d. 39H


MOV A, #15H

SWAP A

XRL A, #0FFH

Kt qu ca thanh ghi A l:a. 0AEH b. 51H c. 0FFH d. 15H


MOV A, #56H

CPL A

ANL A, #0FFH


a. 56H b. 0A9H c. 0FFH d. 65H



86/146


37


MOV 78H, #56H

XCH A, 78H


a. 78H b. 45H c. 34H d. 56H


MOV 78H, #56H

XCH A, 78H


a. 78H b. 45H c. 34H d. 56H


MOV A, #34H

MOV 78H, #56H

MOV R0, #78H

XCHD A, @R0


a. 36H b. 54H c. 78H d. 35H


MOV A, #34H

MOV 78H, #56H

MOV R0, #78H

XCHD A, @R0


a. 36H b. 54H c. 78H d. 35H


MOV A, #34H


87/146

SETB ACC.7

CLR ACC.2

CPL ACC.0


a. 0B1H b. 0B0H c. 31H d. 30H376. Cho on m Assembler sau:

MOV A, #0FFH

SETB ACC.7

CLR ACC.2

CPL ACC.0


a. 0FFH b. 7FH c. 0F7H d. 0FAH377. Cho on m Assembler sau:

MOV R1, #20H

LOOP: MOV @R1, #0

INC R1

CJNE R1, #40H, LOOP

a. Kt qu nh c a ch 20H c gi tr bng 0

b. Kt qu nh c a ch 40H c gi tr bng 0c. Kt qu nh c a ch t 20H3FH c gi tr bng 0

d. Kt qu nh c a ch 20H 40H c gi tr bng 0



88/146


38

378. Trong cc lnh sau ch ra lnh khng hp l:a. INC A b. DEC A c. INC DPTR d. DEC

DPTR

379. Cho on m Assembler sau:MOV R1, #3

MOV A, #15

LOOP: ADD A, #2

DJNZ R1, LOOP

Kt qu thanh ghi A:

a. 21 b. 15 c. 19 d. 3


MOV 35H, #6DH

MOV R1, #35H

MOV A, #0EFH

ANL A, @R1


a. 32H b. 20H c. 6DH d. 35H


CLR P

MOV P1, #18H

MOV C, P

MOV P1.0, C

CPL P1.7

Kt qu thanh ghi P1 l:

a. 99H b. 19H c. 98H d. 18H

382. Khi thc hin lnh CJNE A, #40H, rel th c nh C = 0 nu:

a. Gi tr thanh ghi A ln hn 40H

b. Gi tr thanh ghi A bng 40H


89/146

c. Gi tr thanh ghi A nh hn 40H

d. Gi tr thanh ghi A ln hn hoc bng 40H

383. Khi thc hin lnh CJNE A, #40H, rel th c nh C = 1 nu:

a. Gi tr thanh ghi A ln hn 40H

b. Gi tr thanh ghi A bng 40Hc. Gi tr thanh ghi A nh hn 40H

d. Gi tr thanh ghi A ln hn hoc bng 40H

384. Khi thc hin lnh CJNE A, 40H, rel th c nh C = 0 nu:a. Gi tr nh 40H nh hn gi tr thanh ghi A

b. Gi tr nh 40H bng gi tr thanh ghi A

c. Gi tr nh 40H ln hn gi tr thanh ghi A

d. Gi tr nh 40H nh hn hoc bng gi trthanh ghi A

385. Khi thc hin lnh CJNE A, 40H, relth c nh C = 1 nu:

a. Gi tr nh 40H nh hn gi tr thanh ghi A

b. Gi tr nh 40H bng gi tr thanh ghi A

c. Gi tr nh 40H ln hn gi tr thanh ghi A

d. Gi tr nh 40H nh hn hoc bng gi tr thanh ghi A



90/146


39


MOV A, #17

SETB C

LOOP: SUBB A, #2

DJNZ R1, LOOP


a. 10 b. 11 c. 12 d. 17


MOV A, #17

LOOP: SETB C

SUBB A, #2

DJNZ R1, LOOP


a. 10 b. 11 c. 17 d. 8


MOV A, #15H

JB P, SKIP

MOV A, #0FFH

SJMP EXIT

SKIP: CLR A

EXIT: END


a. 15H b. 0FFH c. 00H d. C 3

u sai


MOV A, #18H


91/146

JB ACC.7, SKIP

MOV A, #0FFH

SJMP EXIT

SKIP: CLR A

EXIT: ENDKt qu ca thanh ghi A l:

a. 18H b. 0FFH c. 00H d. C 3

u sai


MOV A, #18H

MOV 30H, #10H

JB ACC.7, SKIPADD A, 30H

MOV 30H, A

SJMP EXIT

SKIP: SUBB A, 30H

MOV 30H,A

EXIT: END

Kt qu nh 30H cha:a. 30H b. 18H c. 28H d. 08H



92/146


40


ADD A, #1

JNZ SKIP

ADDC A, #02H

SJMP EXIT

SKIP: ADDC A, #01H

EXIT: END

Kt qu thanh ghi A:

a. 0FFH b. 03H c. 02H d. 01H


ADD A, #2

JZ SKIP

ADDC A, #02H

SJMP EXIT

SKIP: ADDC A, #01H

EXIT: END

Kt qu thanh ghi A:

a. 0FFH b. 03H c. 04H d. 02H

393. S Timer v s mode hot ng ca 8051/8031 l:a. 1, 3 b. 2, 4 c. 2, 3 d.1, 4

394.Ngun xung nhp cho cc Timer l xung vung c tn s bng tn s daong thch

anh:

a. 1/2 b. 1/12 c. 1/4 d. 1/6

395.Ngi ta s dng Timer :a. nh th khong thi gian b. m s


93/146

kin

c. To tc baud cho cng ni tip d. C 3

u ng

396. Ch Timer t ng np li l ch :a. 0 b. 1 c. 2 d. 3397. Ch Timer 16 bit l ch :a. 0 b. 1 c. 2 d. 3

398. Khi lp trnh nh th vi khong thi gian t 256 65536 s (gi s dngthch anh l

12MHz) ta dng k thut:

a. iu chnh bng phn mm b. Timer 8 bit t ng np li

gi tr uc. Timer 16 bit d. Timer 16 bit kt hp vi

cc vng lp

399. Khi lp trnh nh th vi khong thi gian t 10 256s (gi s dngthch anh l

12Mhz) ta dng k thut:

a. iu chnh bng phn mm b. Timer 8 bit t ng np

li gi tr uc. Timer 16 bit d. Timer 16 bit kt hp vi

cc vng lp

400. Khi lp trnh nh th vi khong thi gian nh hn 10s (gi s dngthch anh l




cc vng lp

401. Khi lp trnh nh th vi khong thi gian ln hn 65536s (gi s dngthch anh l





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cc vng lp



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41

402. C bo trn ca Timer (TF) s c set ln 1 nu s m t:

a. 0000H0001H b. 0001H 0002H

c. FFFEH FFFFH d. FFFFH 0000H

403. Bit iu khin chy/dng ca Timer 1 l bit:

a. TR1 b. TF1 c. TL1 d. TH1404. Khi ta chn mode hot ng l mode 1 ta cn thit lp hai bit

M1M0 c gi tr:

a. 00 b. 01 c. 10 d. 11

405. Khi ta chn mode hot ng l mode 0 ta cn thit lp hai bit

M1M0 c gi tr:

a. 00 b. 01 c. 10 d. 11

406. Khi ta chn mode hot ng l mode 3 ta cn thit lp hai bitM1M0 c gi tr:

a. 00 b. 01 c. 10 d. 11

407. Khi ta chn mode hot ng l mode 2 ta cn thit lp hai bit

M1M0 c gi tr:

a. 00 b. 01 c. 10 d. 11

408. Khi ta mun s dng Timer 0 mode 2 ta cn khi ng thanh

ghi TMOD:

a. MOV TMOD, #02H b. MOV TMOD, #12H

c. MOV TMOD, #20H d. MOV TMOD, #10H

409. Khi ta mun s dng Timer 1 mode 1 ta cn khi ng thanh

ghi TMOD:

a. MOV TMOD, #01H b. MOV TMOD, #02H

c. MOV TMOD, #20H d. MOV TMOD, #10H

410. Khi bit m cng GATE c xa bng 0 th Timer s nhn xung

nhp:

a. Bn trong chip b. Bn ngoi chip


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c. Khng nhn xung nhp d. C 3 u sai

411. Khi s dng Timer m s kin, ta cn thit lp bit:

a. C/T = 0 b. C/T = 1 c. TR = 0 d. TR = 1

412. Khi s dng Timer nh th, ta cn thit lp bit:

a. C/T = 0 b. C/T = 1 c. TR = 0 d. TR = 1413. Khi s dng Timer v iu khin Timer chy, ta cn thit lp

bit:

a. C/T = 0 b. C/T = 1 c. TR = 0 d. TR = 1

414. Khi s dng Timer v iu khin Timer dng, ta cn thit lp

bit:

a. C/T = 0 b. C/T = 1 c. TR = 0 d. TR = 1

415. Cho on m Assembler sau:MOV 30H, #02H

MOV A, 30H

MOV DPTR, #TABLE

MOVC A, @A+DPTR

MOV P1, A

TABLE:

DB 0C0H, 0F9H, 0A4H, 0B0H, 99H, 92H, 82H, 0F8H, 80H, 90HKt qu thanh ghi P1 l:

a. 02H b. 30H c. 0A4H d.0F9H



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42

416. Cho chng trnh sau:DELAY:

MOV TMOD, #02H

MOV TH0, # -50

SETB TR0

LOOP:

JNB TF0, LOOP

CLR TF0

CPL P1.0

SJMP LOOP

END

Chng trnh ny dng :

a. To dng sng vung c chu k 100S trn chn P1.0

b. To dng sng vung c chu k 50S trn chn P1.0

c. To dng sng vung c chu k 100mS trn chn P1.0

d. To dng sng vung c chu k 50mS

trn chn P1.0


MOV TMOD, #02H

MOV TH0, #0CEH

SETB TR0

LOOP:

JNB TF0, LOOP

CLR TF0

CPL P1.0

SJMP LOOP

END


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Chng trnh ny dng :



c. To dng sng vung c chu k 206S trn chn P1.0

d. To dng sng vung c chu k 103Strn chn P1.0 418. Cho chng trnh sau:

DELAY:

MOV TMOD, #02H

MOV TH0, # -100

SETB TR0

LOOP:

JNB TF0, LOOPCLR TF0

CPL P1.1

SJMP LOOP

END

Chng trnh ny dng :

a. To dng sng vung c chu k 100mS trn chn P1.1

b. To dng sng vung c chu k 200mS trn chn P1.1c. To dng sng vung c chu k 200S trn chn P1.1

d. To dng sng vung c chu k 100S trn chn P1.1



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43


MOV TMOD, #02H

MOV TH0, # 9CH

SETB TR0

LOOP:

JNB TF0, LOOP

CLR TF0

CPL P1.1

SJMP LOOP

END

Chng trnh ny dng :




d. To dng sng vung c chu k 100S

trn chn P1.1 420. Cho chng trnh sau:DELAY:

MOV TMOD, #01H

LOOP:

MOV TH0, # HIGH(-500)

MOV TL0, #LOW(-500) SETB

TR0

JNB TF0, $

CLR TR0

CLR TF0

CPL P1.0

SJMP LOOP


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END

Chng trnh ny dng :

a. To dng sng vung c chu k 1000mS trn chn P1.0


c. To dng sng vung c chu k 1000S trn chn P1.0d. To dng sng vung c chu k 500mS trn chn P1.0



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44


MOV TMOD, #01H

LOOP:

MOV TH0, #3CH

MOV TL0, #0B0H

SETB TR0

JNB TF0, $

CLR TR0

CLR TF0

CPL P1.1

SJMP LOOP

END

Chng trnh ny dng :


b. To dng sng vung c chu k 50mS trn chn P1.1



trn chn P1.1 422. Cho chng trnh sau:DELAY:

MOV TMOD, #01H

LOOP:

MOV TH0, # 0FEH

MOV TL0, #0CH

SETB TR0

JNB TF0, $

CLR TR0

CLR TF0


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CPL P1.0

SJMP LOOP

END

Chng trnh ny dng :

a. To dng sng vung c chu k 65036S trn chn P1.0b. To dng sng vung c chu k 32518S trn chn P1.0


d. To dng sng vung c chu k 500S trn chn P1.0



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45


MOV TMOD, #01H

LOOP:

MOV TH0, #HIGH(-50000)

MOV TL0, #LOW(-50000)

SETB TR0

JNB TF0, $

CLR TR0

CLR TF0

CPL P1.1

SJMP LOOP

END

Chng trnh ny dng :


b. To dng sng vung c chu k 50mS trn chn P1.1



trn chn P1.1 424. Cho on m lnh sau:CJNE A, #30H, TIEP

TIEP: JNC SKIP

Ta c th thay th on m lnh trn bng:

a. CJNE A, #30H, $

JNC SKIP

b. CJNE A, #30H, $+3

JNC SKIP

c. CJNE A, #30H, $-3

JNC SKIP


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d. CJNE A, #30H, SKIP

TIEP: JNC SKIP

425. Cho m lnh sau:

WAIT: JNB TF1, WAIT

Ta c th thay th cu lnh trn bng lnh:a. JNB TF1, $ b. JNB TF1, $+1

c. JNB TF1, $+2 d. JNB TF1, $+3


MOV 30H, #04H

MOV A, 30H

MOV DPTR, #TABLE

MOVC A, @A+DPTRMOV 50H, A

TABLE:

DB 00H, 01H, 04H, 09H, 16H, 25H, 36H, 49H, 64H, 81H

Kt qu nh c a ch 50H l:

a. 04H b. 16H c. 09H d.50H



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46

427. Cho on m Assembler sau :

ORG 0000H

MOV 30H, #0B0H

MOV A, 30H

END


a. 30H b. B0H c. 0BH d. 00H


ORG 0000H

MOV 30H, #0B0H

MOV A, 30H

END


a. 30H b. B0H c. 0BH d. 00H


ORG 0000H

MOV 30H, #35H

MOV 35H, #4BH

MOV A, #35H

END


a. 4BH b. 30H c. 35H d. 23H


ORG 0000H

MOV 30H, #35H

MOV 35H, #4BH

MOV A, #35H

END


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a. 4BH b. 30H c. 35H d. 23H


ORG 0000H

MOV 30H, #35HMOV 35H, #4BH

MOV A, #35H

END


a. 4BH b. 30H c. 35H d. 23H


ORG 0000HMOV 30H, #35H

MOV 35H, #4BH

MOV A, 35H

END


a. 4BH b. 30H c. 35H d. FFH



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47


ORG 0000H

MOV 30H, #4CH

MOV R1, #30H

MOV A, R1

END


a. 30H b. 4CH c. 00H d. 48H


ORG 0000H

MOV 30H, #4CH

MOV R1, #30H

MOV A, @R1

END


a. C4H b. 30H c. 48H d. 4CH


ORG 0000H

MOV 40H, #65

MOV 41H, #19

MOV A, 40H

END


a. 65H b. 19H c. 41H d. 40H


ORG 0000H

MOV 40H, #65


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MOV 41H, #19

MOV R1, #40H

MOV A, R1END


a. 19H b. 65H c. 40H d. 41H


ORG 0000H

MOV 40H, #65

MOV 41H, #19

MOV R1, 40H

MOV A, @R1

END


a. 19H b. 65H c. 40H d. 13H



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48


ORG 0000H

MOV 40H, #52

MOV 52H, #17

MOV R1, #40H

MOV A, R1

END


a. 52H b. 40H c. 17H d.

48H


ORG 0000H

MOV 40H, #52

MOV 52H, #17

MOV R1, #40H

MOV A, @R1

END


a. 17H b. 52H c. 40H d. 34H


ORG 0000H

MOV R0, #30H


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MOV 31H, #4CH

MOV @R0, 31H

END


a. 4CH b. 30H c. 31H d. FFH441. Cho on m Assembler sau :

ORG 0000H

MOV R0, #32H

MOV 33H, #4AH

MOV @R0, #33H

END

Kt qu ca nh c a ch 32H l:a. 32H b. 4AH c. 33H d. 23H


ORG 0000H

MOV A, #2EH

INC A

ANL A, #19

MOV R0, #31HMOV @R0, A

END


a. 2EH b. 03H c. 19H d. 31H



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49


ORG 0000H

MOV A, #2EH

INC A

ANL A, #19

MOV R0, #31H

MOV @R0, A

END


a. 03H b. 19H c. 2EH d. 31H


ORG 0000H

MOV R1, #41H

MOV 40H,

#1EH

MOV @R1, 40H

MOV A, 41H

END


a. 40H b. 41H c. 14H d. 1EH


ORG 0000H

MOV A, #4BH

ADD A, #30H

END


a. 4EH b. FFH c. 7BH d. 1BH


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50

449. Cho on m Assembler sau :ORG 0000H

MOV A, #32

ADD A, #23H

END


a. 20H b. 55H c. 43H d. 32H


MOV A, #32H

ADD A, #23

ENDKt qu ca thanh ghi A l:

a. 49H b. 55H c. 43H d. 64H


ORG 0000H

MOV A, #40H

MOV 40H, #0B3H

ADD A,40HEND


a. 73H b. 40H c. B3H d. F3H


ORG 0000H

MOV A, #40H

MOV 40H, #0B3HADD A, #40H


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END


a. 80H b. F3H c. 3FH d. 73H


ORG 0000HMOV A, #0B0H

MOV 30H, #23H

MOV R1, #30H

ADD A, R1

END


a. B0H b. E0H c. 53H d. 60H454. Cho on m Assembler sau :

ORG 0000H

MOV A, #0B0H

MOV 30H, #23H

MOV R1, #30H

ADD A, @R1END


a. 53H b. E0H c. 60H d. D3H



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51


CLR C

MOV A, #4BH

MOV 30H, #23H

SUBB A , #30H

END


a. 1BH b. 53H c. 7BH d. 28H


CLR C

MOV A, #4BH

MOV 30H, #23H

SUBB A, 30H

END


a. 1BH b. 7BH c. 28H d. 53H


ORG 0000H

MOV A, #0C0H

CLR C

MOV R1, #40H

MOV 40H, #15H

SUBB A, R1

END


a. F0H b. ABH c. 55H d. 80H


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ORG 0000H

CLR C

MOV A , #0C0H

MOV R1, #40H

MOV 40H,

#15H

SUBB A,@R1

END


a. F0H b. ABH c. 55H d. 80H459. Cho on m Assembler sau :

ORG 0000H

MOV A, #0FCH

ADD A, #09H

END


a. 05H b. FFH c. 00H d. Khngxc nh.



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