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A

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??????? ??????? ???? ?????? ???? ???? ??? ???????? ??? ????? ?????? '0' ?- '1' ... Octal Latch. 74374. Output byte. input. Clock. End of Byte. Enable ... – PowerPoint PPT presentation

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Title: A


1
??????????????????? ?????????? ???"? 2004/2005
  • A
  • ?"? ???? ?????
  • ?????? ?????? ??????
  • ?????????? ??-?????? ????

2
??????? ??????? ???? ?????? ???? ???? ???
???????? ??? ????? ?????? "0" ?- "1". ??? ?????
?????????? ???? ?????? ???? ????? "0" ?- "1"
??????? ????? ??????? ?????????. ???? ???? ????-
??? ?????? ????? ????????. ??????? ???? ???????
??????? - ???? ??????????? ???? 16 ( 16
?????) ???? ????? ?????? ?????? ????? ??????
????? ????? ?"? ????? ????? ???????????
3
????? (BIT) ???? ??????? ??? "0" ?? "1". ???
(BYTE) ????? ?? 8 ??????. ????? ?????? ???????
??????? ??????? ??? ASCII (American Standard
Code for Information Interchange) ???? ?? ??
???? (?????? ???) ????? ?"? ???? ?? 8 ??????
?????? ???? B.C.D ???? ?????? ??????
???????? ?????? ????????. ????? ?? ????? ???????
???? ??? ???? ??????? ?????? ?"? ???? ?????? ?? 4
?????? ?????? ??????? ???? ?? ??? ???? ??????
??????? ???? ??????? ???????, ??? ???? ????? ????
?????? ?? ?????? ?????? ??????? ???? Seven
Segment.
4
  • ?????? ?????? ???????
  • ??? ??????
  • ?????? ???????? ?????? ????? ?"? ?????? ???????
    ????.
  • ????? ????? ?????? ????? ?"? ?????? ???????
    ?????????? ?? ?????? (?? ??????)
  • ?????? ?????? ???????

BUFFER (????) ??? ???? ?????? ???? ???? ????
??????, ????? ???.
NOT (????)
74HC32
5
AND ????? "1" ?? ?? ?? ??????? "1".
74LS08
NAND ????? ?? AND.
OR ????? "1" ?? ??? ??????? "1".
74HC04
6
NOR ????? ?? OR.
XOR (Exclusive OR) ????? "1" ?? ?? ??????? ?????
?? ???.
????? ???? (Exclusive NOR) ????? "1" ?? ??
??????? ???? ?? ???.
7
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8
????? ??????? ????????
9
  • ????? ????? ???? ????
  • ????? ????? ?????? ?? ?"? ???? ???.
  • ????? ????? ???????.
  • ????? ?????? ?? ?????? ?????? ????? ?????????
    (???? ?????, ???? ?????).
  • ????? ????.

10
????? ??????? ???? ???? ???
???? ?? ?????? ?????? ?? ?? ?????? ??????? ????
"1".
?????? ???? "1" ?? ???? ?? ???? ?? ?????? ?????
"1".
11
74151
12
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13
(No Transcript)
14
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15
(No Transcript)
16
?????? ?? ????? ?????? ?? ???????, ??? ???? ???
????? ????? ???? ?????? Seven Segment Decoder.
?????? ?????? ????? ?????? ????? (???? ?? ????
?????). ??? ???? ?? ???? ????? (????? ???? a-g),
??? ????? ??? ????? ?? ???? ????? ????? ?????
????? ????? ??? ????? "1" ????? ?? ????? ????
(???? ?????) ??? ????? ?? ?????? ?????????
??????? ?????? ????? BCD ?????? ????
??????. ?????? ???? ?????? 3 ?? 5
17
????? ????? ?????? ????? ?"? ?????? ???????
?????????? ?? ?????? (?? ??????). ???? ????
????? (Flip-lop) ????? ?????? ??????? ?????
????? ??? ????? SR
?????
18
????? ????? SR ?"? ????? ????? NAND ?- NOT
????? ???????? ?????
S
S(k)
Q(k)
Q?R
Q
Q(k)
R(k)
Q?R
R
?????
19
????? ??????? ?? ??????? ??? ????? ??? ?? ??????
???????
5V
S
Q
A
on
B
off
R
5V
?????? ?????? ?????? ???? ?? ????? ???? ??????
????? ?????? ???? ????? ?? Q. (???? ????? ????
??????, ?? ?- on ??? ?- off, ??? ?????? ????)
20
????? D
?????
???? CLK0 ?? ?????? ???? ?? ????. ???? CLK1
?? ??? ?????? ??? ???? ??????.
21
??????- ?????? ?? Latch ??? ???? IC ?????? byte
??? (8 ??????), ????? ??????? ????? ????? ????
???????.
???? ????
???? ??????
D0
D7
5V
Enable
74374
Q0
Q7
22
???? ???? (Shift Register) ??? ?????? ?????
??????? ?????? ??????? ????? ????? ??? serial
line (?????? RS232)
????? ?? ? byte 01001101
??????
????? ??????
????? ??????
?????? ???? ????? ?????? ??????? ??? ?????? ???
??? ????? T ????? ????? ???? ??????? ???????
??????? ??"? ??? ????? ??? ????? ????? ?????????.
?? "?????" ???? ????? Di ????? ???? ?????? Di-1
?????? 8 ????? ???? ??????? ("?????" ???? ????
????? ????.
23
????? ??? ????? ????? ?? ????, ????? ?-1 ????
?????? ????? ? byte . ????? ????? ?? ? byte ?
Latch ??? ????? 8T ????? ?????? ? byte ???
?????.
input
Shift Register 74175
Clock
Octal Latch 74374
End of Byte
Enable
Output byte
24
???? ???? ??? ???? ??? ???? ?? ???? ????? ???????
???? ????? ?? ????? ????? (???? ??? ????? ?????).
???? ??? ?????? ?? ?? ?????? ?????, ???? ?????
????? ????? ????.
???? ????? ?? ???? ?????? ?? ???? ????? (????
????? ?????).
????? ???? ?????? ????? ?? ??? BCD ???? ????
????? ??? 10 ????? (???? ?? 9 ??????)
????? ?? ????? ???? ??? ???? ?????? ??? ??? ????
?????? ?? ???? ?????? ??? ???????? (?????? ????
CP) ??? ????? ?- 9 ?- 0 ?????? ??? CP
74LS93
????? ????? (1001)2(9)10
25
????? 555 ???? ????? ?? ????? ???, ??? ???????
???????? ?? ?? ???? ????? ???? ????? ???? ????
?????, ???? ???? ??? ????? ????? ???? ???? ???
???? ???? ??? ??? ????? ???? ????? ???? ?????.
???? ?? ????? ????? ???? ??? ????? ????. ?? ????
??? ????? ?? ??????, ????? ???? ??? ??? ??? ???
????? ???? ?????? ???. ???? ?? ???? ?????. ????
????? (8 ?????)
????? ???? 555 ?"? ????? ?????? ???????? ??? (4)
?????? ?????? ?????? ?????????? Q1 ???? ?????
???? ???? ????? ????? ????
Q0 ????? ???? Q1
26
?? ????
????? ???? ?????? ???? 5 ??? ????? ??????
???????? ?? ??? ?? ??????? ?? ????? ????. ??? (4)
????? ??????? ?- VCC ??? ????? ????? ?????? ???
???? ??????. ??????? R,C ?????? ?? ??? ???? ???
?????? ???? ???? ??? ????. ?????? (???? ???? ????
?? ????) ????? ???? ??? (2) ???? ?- 0, ????
???? ??? ?? ???? ????? ???? 1 (???? ?- VCC(1/3))
27
???? ????? Q1 ??? ?????????? Q1 ??????, ????
?? ???? ?????, S0 ?- R1. ???? ??? ???????
???? ?- 0, R ???? ??? ?- 1, ??? Q0,
?????????? Q1 ?????? ????? ????? ?????. ???? ???
??????? ???? ?- 1, R ???? ????? 0 ?????
?????? ?? ?????. ???? ???? ?? ???? ???? ?-
(2/3)VCC S ???? ????? 1 ??? Q1, ??????????
Q1 ?????? ????? ???? ??? ?? ???? ??? ??????????
?????. ???? ?????? ?? ???? S ???? ????? 0, Q
???? 1 ??????????? Q1 ???? ??????.
28
?? ????
???? ????? ????? ???? ?? ???? ??? ???, ??? R1,
S0, Q0, ?????????? Q1 ?????? ????? ????
??? R1R2. ???? ???? ?? ???? ???? (1/3)VCC ??
R0, S0 ?- Q ????? ????? 0.
29
???? ???? ?? ???? ???? ?? - (2/3)VCC ?? R0,
S1, Q1, ?????????? Q1 ?????? ????? ?????
??? R1. ???? ???? ?? ???? ???? ???? ?- (2/3)VCC
?? R0, S0 ?- Q ???? ?- 1. ???? ???? ??
???? ???? ???? ?- (1/3)VCC ?? R1, S0,
Q0, ?????????? Q1 ?????? ????? ??? ???? ???
R1R2. ???? ???? ?? ???? ???? ?? - (1/3)VCC ??
R0, S0, ?- Q ???? ?- 0. ????? ?????.
30
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32
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