thiẾt kẾ mẠch in sỬ dÙng phẦn mỀm orcad 9

8/2/2019 THIT K MCH IN S DNG PHN MM ORCAD 9

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THIT K MCH IN DNG ORCAD 9.0

Trng i Hc Bch Khoa H NiKhoa in T Vin Thng

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THIT K MCH IN S DNG PHN MM ORCAD

Mch Kit AT89S52

Gio vin hng dn : V Hng VinhH v tn : Mai Sn c

Lp : in t 9 K50

H NI 10/2008

Sinh vin: Mai Sn c 1 Lp in t 9_K50 HBKHN


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THIT K MCH IN S DNG PHN MM ORCAD 9.0

Mch Kit AT89S52

1.Gii Thiu1.1 Chc nng:

Mch kit AT89S52 c chc nng sau:- Mch s dng hin th n Led n- C th pht trin nng cao hn

1.2 Cc linh kin trong mch- AT89S52: Vi iu khin- CON 2,CON6,CON8,CON16

- LM 7805: n p 5V- LCD 16x2: mn hnh hin th- DB9: cng ni tip giao tip my tnh- Crystal: thch anh 12MHz- R: in tr cc loi (100m, 1kilm, 4,7 kilm,)- C: t in cc loi (33p, 4,7uF, 10uF,)- Bin tr tinh chnh- Cng tc n- LED- Trasistor

Cc khi trong mch+Khi Vi iu khin



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P 2 . 3

P 1 . 4

P 0 . 7

P 0 . 1

P 1 . 2

P 2 . 0

P 1 . 6

P 2 . 4P 0 . 5

P 0 . 0

P 1 . 5

P 3 . 0

R E S E T

P 0 . 2 P 0 . 2

P 2 . 5

P 1 . 7P 1 . 6

P 0 . 3

P 3 . 1

P 3 . 7

P 0 . 4

P 2 . 7

P 0 . 5

P 3 . 2

P 3 . 4

P 2 . 6

P 0 . 4

P 0 . 7

P 3 . 5R E S E T

P 0 . 6

P 2 . 1

P 3 . 3

P 0 . 0

V C C

P 1 . 0

P 3 . 6

P 2 . 2

P 1 . 5

P 3 . 3

P 1 . 1

P 1 . 3

P 1 . 7

V C C

P 0 . 6

P 3 . 2

P 0 . 3

P 0 . 1

G N D

G N D

V C C

U 1

A T 8 9 C 5 1

91 81 9

2

0

2 9

3 0

3 1

4

0

12345678

2 12 22 32 42 52 6

2 72 8

1 01 11 21 31 41 51 61 7

3 93 83 73 63 53 4

3 33 2

R S TX T A L 2X T A L 1

G

N

D

P S E N

A L E / P R O G

E A / V P P

V

C

C

P 1 . 0P 1 . 1P 1 . 2P 1 . 3P 1 . 4P 1 . 5P 1 . 6P 1 . 7

P 2 . 0 / A 8P 2 . 1 / A 9

P 2 . 2 / A 1 0P 2 . 3 / A 1 1P 2 . 4 / A 1 2

P 2 . 5 / A 1 3P 2 . 6 / A 1 4P 2 . 7 / A 1 5

P 3 . 0 / R X DP 3 . 1 / T X D

P 3 . 2 / I N T OP 3 . 3 / I N T 1

P 3 . 4 / T OP 3 . 5 / T 1

P 3 . 6 / W RP 3 . 7 / R D

P 0 . 0 / A D 0P 0 . 1 / A D 1P 0 . 2 / A D 2P 0 . 3 / A D 3P 0 . 4 / A D 4

P 0 . 5 / A D 5P 0 . 6 / A D 6P 0 . 7 / A D 7

C 2C A P N P

C 1C A P N P

Y 1

C R Y S T A L

U 2T r o b a n g

1234567

89

v c cR 0R 1R 2R 3R 4

R 5R 6R 7

J 1

C O N 8

12345

678J 3

C O N 812345678

J 2

C O N 8

12345678

J 5

C O N 6

123456

J 4

2 C H A N

12

J 6

C O N 6

123456

J 1 3

C O N 8

123

45678

V C C _ A R R O

R E S

V C C

R 5

R

S W 2

C O N G T A C

1 2

J 1 5

C O N 2

12

R 24 . 7 K

C 5

1 0 u F

R E S E T

+Khi hin th



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+ Khi ngunV C C _ A R R O W

V

C

C

D 1

L E

R 3

3 3 0

U 3L M 7 8 0 5 / T O

1

2

3V I N

G

N

D

V O U T

J 7

C O N 2

12

C 41 0 0 u F

C 31 0 0 u F

J 8

C O N 2

12

J 9

C O N 2

12

N G U O N

+Khi n LED


P 0 . 0V E E

P 2 . 7P 2 . 6

P 2 . 4P 2 . 3P 2 . 2

P 2 . 0

P 0 . 1P 0 . 2

P 2 . 1

P 2 . 5

V D DV C C

A V C C

VC

C

V E E

G N D

G N D

G

N

D

R 71 K

U 1 3

B I E N1

3

2

J 1 2

C O N 1 6

123456789

1 01 11 2

1 31 41 51 6

L C D


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G N D

V C

D 5

L E D

D 4

L E D

D 6

L E D

D 2

L E D

D 3

L E D

D 9

L E

D 8

L E D

J 1 4C O N 8

1 2 3 4 5 6 7 8

D 7

L E D

R 43 3 0

U 4

P N P

23

1U 9

P N P

23

1 U 1 1

P N P

23

1 U 5

P N P

23

1U 1 0

P N P

23

1U 8

P N P

23

1 U 6

P N P

23

1 U 7

P N P

23

1

8 L E D

+ Khi cng tc

G N D

S W 3

S W P U S H B U T T O N

S W 4

S W P U S H B U T T O

S W 5

S W P U S H B U

J 1 6

C O N 4

1 2 3 4

S W 6

S W P U S H

2.V s nguyn l Orcad capture

Trc khi tin hnh v mch in th cn phi c 1 s nguyn l chnhxc ,y l yu t quan trng tin quyt quyt nh ti vic thit k mchin . to s nguyn l ta s dng chng trnh Capture c trong

Orcad.chn Start > Programs > Ocard 9.0 > Capture



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Trn mn hnh ca s Ocard Capture xut hin ta nhp chut vo menuFile > New > Project.Hp thoi New project , ti khung Name nhp vo tn ca s nguyn ls to . Nhn vo nt Browse chn ng dn cha s mch . NhnOK tr v mn hnh lm vic



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tin hnh ly linh kin chn Place > part. Hp thoi Place part xuthin, nu l ln u s dng Orcad Capture th cn phi Add Library



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sau Ly cc linh kin no ra th g tn linh kin Part, tng t nhAT89C52:

Vi nhng linh kin khng c sn trong cc th vin trn th chng ta

to mi linh kin nh sau:To mi cm bin nhit LM35Dz:Chn File New Library New Part:



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Kt qu:



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Trong qu trnh chn sp xp linh kin ta c th xoay linh kin bng

phm tt R

Sau khi tin hnh ly y linh kin, i dy cho mch nguyn lchng ta s dng cng c Place wire hoc phm tt l W.

Tip theo chng ta tin hnh cp ngun cho cc linh kin. Khu ny cn

m bo cc linh kin c cp ngun ging nhau th gi tr in p cngphi ging nhau ( C tn ngun cp ging nhau ). Thc hin vic ny bngcng c Place power v Place ground.



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Bm vo nt Restore trn ca s thu nh mn hnh lm vic . Kchhot ca s qun l Project bm chn trang s va thit k . Sau

bm vo biu tng Design rules checktrn thanh cng c kim tra s nguyn l . Hp thoi Design rule checkxut hin bm OK kim tra.Bm chn biu tng Create Netlist trn thanh cng c to lp netlist c

phn m rng .MNL . Hp thoi Create netlist xut hin chn Layout, tiOptions chn Run ECO to Layout t ng cp nht s thay i s



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nguyn l vo Layout, ti khung Netlist File chn th mc cha tp tin.MNL. Chn xong bm OK.

3.Thit k mch in bng Orcad LAYOUT



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S dng Ocard layout, sau khi mn hinh layout xut hin chn File

> New. Hp thoi Load Template File xut hin . Bn trong hp thoi nayl danh sch cc dng bn mch ta chn DEFAULT.TCH sau bmOpen.



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Hp thoi Load netlist suorce xut hin . Trong hp thoi nay chn tp tin.MNL to ra trong chng trnh v mch nguyn l Capture. Chn xong

bm nt Open . Hp thoi Save File As xut hin yu cu nhp tn lu

bn mch nhn nt Save tip tc.



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Qa trnh a cc linh kin vo mch in bt u. Nu cc linh kin chac nhn bit th s xut hin hp thoi Link Footprint to



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Component.Trong hp thoi ny chn nt Link Footprint to Component nhp thm cc chn cho linh kin.

Khi kt thc qu trnh nhp chn cho linh kin, Layout Plus s chuynsang mn hnh



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Ti y nhn biu tng Reconnect Mode n i cc ng dy ni giacc linh kin nh hnh di

Cc mi ni gia cc linh kin c lin quan c hin ln khi ta chn mtlinh kin.

Tip theo l chn s lp v,vic t lm mch IN nh ch c th v 1lp nn chng ta chn nh sau:

Nhn chut vo biu tng View Spreadsheet sau chn Strategy >Route Layer. Hp thoai xut hin , ti mc Enabled nhn chn cc lp kov mch in , sau nhn phi chut v chn lnh Properties khi hpthoi Edit layer Strategy xut hin b du Routting Enabled, sau bm

Ok.



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Click vo Routing Enabled:



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Kt thc vic chn v 1 lp.

nhn mch c r hn, ta khng cho hin th lp ASYTOP bng cchchnh sa vo Colour Setting nh sau:



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B tr linh kin cho hp l l 1 trong nhng iu kin quan trong quytnh ti cht lng , kh nng chng nhiu , tnh thm m , v kh nng di dy ca mch ngoi ra cn c s tham gia ca cc yu t yu cu vkch thc mch , yu cu v linh kin lm mch ( loi thng hay dn ) ,yu cu v kh nng thc hin mch nhiu lp c th lm nhiu hn 2 lp)

Khi b tr linh kin ta dng cng c Component Tool ,y l cng cdng di chuyn cc linh kin , trong qu trnh di chuyn s dng cc phmtt R (xoay linh kin ) phm T ( lt ngc linh kin sang mt cn li )

Cc phm tt O vI dng zoom in v zoom out.

Chn cng c: v sp xp linh kin cho hp l nht, ta

c:



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Trc khi bt u vic i dy, chng ta chn kch thc dy:Chn kch thc thch hp cho tng ng mch ( Ch cc ng

ngun cn c kch thc ln hn cc ng tn hiu ). lm vic ny tanhn chut vo biu tng View Spreadsheet sau chn Strategy

>Nets ,hp thoi Nets hin ra cho php ta chn chi tit kch thc cho ming mch



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Mch t lm nh nn kch thc ca dy nh sau l hp l:



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Sau khi iu chnh xong , ta bt u tin hnh i dy. i vi ccmch khng phc tp th c th dng cng c Autoroute ca Orcad tng i dy , tuy nhin i dy bng tay tt hn nhiu do ngi thit k chng trong cc ng mch v gip mch in c tnh linh hot hn . idy bng tay ta dng cc cng c Edit Segment Mode,Shove Track Mode ,Add/Edit Route Mode

cng c cho php i nhng ung dy vung gc v vt gc.

Vi nhng ng dy rt nh, cn phi i qua chn linh kin, ta nhy vong dy , n W, bng sau hin ra, chn rng ng dy l 0,5 nhsau:

Vi nhng ng dy no khng th i 1 lp c, ta se cu dy, bngcch i dy t 2 pha n v tr thch hp, ri n phm V (Via), chng ta



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s dng dy ng ni 2 l Via sau. (Dy Via c mu vng nh hnh diy).

Tip theo l chn kch thc l chn linh kin: chn kch thc v hnh dng cho chn linh kin ta dng cng c Pin

Tool v Padstacks . Nhn chut vo biu tng Pin Tool sau nhn chutvo chn linh kin cn chnh sa , nhn chut vo biu tng ViewSpreadsheet sau chn Strategy > Padstacks ,hp thoi Padstacks hinra cho php ta chn chi tit kch thc cho mi chn linh kin .



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Cui cng ta c mch ng nh sau:



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thiẾt kẾ mẠch in sỬ dÙng phẦn mỀm orcad 9

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