huong dan ve mach in su sung orcad9[1].0 _2

8/14/2019 huong dan ve mach in su sung orcad9[1].0 _2

1/18

Bi 2: Xut mch in tmch nguyn l vi LAYOUT PLUS

Cc bn ch rng, khi cc bn mmt project, thc ra c 2 mn hnh c mra. Nhng ban u,chng ta ch lm vic vi mn hnh SCHEMATIC, tc l mn hnh v mch nguyn l. Mn hnh thhai l mn hnh dng qun l cc file trong project. Cc bn nn hiu, vic xut t mch nguyn l ramch in, cng ging nh vic bn lp trnh. Sau khi vit chng trnh bng ngn ng trc quan sinhng v gi nh, cc bn s dng cc chng trnh dch dch ra file .exe chy, hoc dch ra file.hex np cho PIC. Vy th ORCAD cng vy, ban u cc bn dng mn hnh trc quan sinh ng v cc mch nguyn l, ORCAD s h trcc bn dch file mch nguyn l sang mch in. Vic xut racc file ny hon ton c thao tc cp file.

Cc bn chn Window, v chn mn hnh qun l file nh hnh sau. Trong project ny, ti t tnproject l DEV_220505. V vy, cc bn chn mn hnh DEV_220505.

Mn hnh qun l file s nh sau:


2/18

Cc bn x cc nhnh cy qun l file ra, cc bn s thy trong project dev_220505 c 2 cy chnh. Cyth nht l cy SCHEMATIC, cy th 2 l cy Design Cache. Cy th nht qun l cc bn v, ca ccbn. Khi cc bn v cc mch ln, cc bn s cn phi v nhiu bn v, y chng ta ch c mt bnv, do chng ta ch c mt file PAGE1 (tn ny c t tng bi ORCAD, cc bn khng cnquan tm). Cy th hai l cy Design Cache, trong m t tt c cc linh kin m cc bn s dngtrong mch nguyn l.

i vi 2 cy ny, cc bn cng khng cn quan tm nhiu lm. Khi cc bn hon thnh xong kha hccbn ny, cc bn c thc thm hng dn v cc ti liu hng dn chuyn su hn bit ccthao tc vi cc nhnh cy cn li.

ORCAD l mt cng c rt mnh, thc hin mt project in t hon thin, v vy, n cung cp thmcc nhnh cy Library, Outputs, Referenced Projects Nhng y, chng ta cha cn quan tm ncc nhnh ny.

Cui cng, cc bn hy ch chut vo dev_220505 v nhp vo , cho n c nh du sng muxanh nh trn hnh. Khi chng ta ch vo v chn gc dev_220505 ny, mi thao tc bin dch scthc hin vi gc dev_220505 ny. Nu bn ch vo v tr khc, bn s khng th dch c.


3/18

Vic u tin, cc bn cn to ra file ch thch cho mch in, vy cc bn chn Tools >> Annotate.


4/18

Mt bng ln s hin ra, cc bn ch cn bm OK, v chng ta s s dng ch mc nh ny.

Sau , mt thng bo rng chng ta s lu cc ch thch ny vo trong project ca chng ta, vy bmOK ln na l xong.


5/18

Tip theo, cc bn cn phi kim tra xem cc thit k ca mnh ng cha, khi xut ra mch in, skhng c cc li mch m mnh rt kh pht hin, chng hn nh hai chn linh kin trng nhau, mnh v2 linh kin cng tn Chn Tools >> Design Rules Check s gip bn lm vic ny.


6/18

Mt thng bo hin ra, bn ch cn bm OK l xong, cng nh trng hp trn.

Li mt thng bo na hin ra, bn thy rng thng bo ny bo rng c mt vi li trong mch nguynl ca chng ta. Vy chng ta bm Yes xem cc li l g?


7/18

Th d, li c in m, l khng c linh kin no c tn l Thch Anh trong th vin, v n t cuhi vi chng ta.


8/18

Li th hai, l c linh kin trng tn C3


9/18

Vy chng ta hy bm X tt mn hnh LOG ON thng bo cc li, mn hnh chng ta s hin ra nhtrn. Chng ta s chuyn li mn hnh mch nguyn l sa cc li c trong thng bo.


10/18


11/18

cc v tr li linh kin, v li ngun in, s c cc du mu xanh trn nh trn hnh. Chng ta s thyrng, chng ta t tn trng gia 2 linh kin trn. iu ny rt d xy ra khi cc bn copy cc module

c thit k sn t cc mch khc dn vo mch ny.

Mt lu rng nu cc bn thch thit k cc dng module sau ny c th ct dn, th tt hn cc bnnn t cc ch s ca linh kin ln, khi to ra cc linh kin mi trn mch nguyn l mi, s khngc s trng lp tn.

y, ti t C3, nn c kh nng b trng tn. Nu ti t C300 th rt kh c chuyn trng, v mtmch in to ra, chng khi no c ti 300 ci tin.

n gin, cc bn ch cn thay tn C3 thnh C4, hoc C100 chng hn, th l xong.


12/18

y, ti sa tn thnh C4.


13/18

Chng ta li quay li mn hnh file, v thc hin ng tc Design Rules Check nh lc ny. Kt quchng ta vn c li sai. Li ny l li chn OUT ca U3 li b ni vi ngun in, trong khi ng outputthng phi ni vi linh kin khc.


14/18

Cc bn thy , ci du chm xanh l cy trn hnh 78L05, c ni vo ngun 5V, 500mA. Thc ra,chng ta gn mt ci nhn ngun y, chng qua l ch tim ny, s l ngun nui mch chyPIC.

V vy, li ny chng ta b qua, v khng cn quan tm ti.

Nh vy, qua phn ny, cc bn bit cch kim li v sa li trn mch nguyn l viCapture/ORCAD.

Cc bn cng nhmt iu rng, khng nht thit phi sa tt c cc li, iu quan trng nht khi xutra mch in l, linh kin bn s dng c s chn ging linh kin tht, v th t cc chn ging linh kintht. Bi v khi xut ra mch in, n ch quan tm n s chn linh kin, v cch b tr cc chn .

V d c th, to mt diode trn mch in, bn hon ton c th v trn mch nguyn l l mt intr. Sau khi bn xut ra mch in, th in trhay diode g, thc ra cng ch l hai l chn. n lc ,bn cm diode vo chng ai ni g c bn. Tuy nhin, nu bn v mt transistor, nhng th t chn1,2,3 v v tr trng ng e,c,b ca transistor tht v transistor trn mch nguyn l khng ging nhau,th n lc xut ra mch in, c th bn s b tro chn.

Do vy, hy v mch nguyn l cng ging vi thc t cng tt, linh kin no c th tm c trongorcad th s dng ng linh kin trong mch nguyn l. Linh kin no khng tm c, th ly mtlinh kin c s chn tng ng v c th t chn tng ng thay th.


15/18

Sau cng, cc bn lm ng tc to ra mch in. i vi ORCAD, mt mch in chnh l mt file cha to

ca cc linh kin, v ng ni t cc chn linh kin vi nhau. ng ni chn linh kin ny, vichn linh kin khc. Cc ng ni chung c gi l mt Net, chnh v vy, vic xut ra file chymch in, c gi l Creat Netlist (to ra danh sch cc Net).

Lu rng, cc bn phi lun click vo gc dev_220505 th mi thc hin c cc lnh Annotate,Check Rules v Creat Netlist. Nu khng s khng lm c.


16/18

Cc bn s thy mt bng hin ra nh sau, cc bn chn Tab Layout xut ra file .MNL dng choLayout Plus. Layout Plus l phn mm dng v mch in.

Cc bn chn nh sau:


17/18

Cc bn chn Options: Run ECO to Layout, User Properties are in inches. Bi v cc mch in u ckhong cch chn theo inches. Cc bn nhn OK l c, v file to ra c chn th mc hinhnh ca bn, v tn file cng c tng t theo tn project ca bn.

Nh vy, n bc ny, cc bn hon thnh xong vic xut ra file .MNL dng cho Layout Plus. Ccbn c th tt Capture, v mLayout Plust ln.

Tuy vy, theo kinh nghim lm vic ca ti, v chng ta c qu nhiu linh kin trn mch, ri cc chn,chng ta cn cn tham kho khi cn thit n mch nguyn l, v vy, cc bn c Capture chy, vmLayout plus ln.


18/18

Chng ta tm thi kt thc phn 2 ca tutorial y, v cc bn bit cch xut ra file mch in tCapture.

Phn sau, chng ta s hc cch lm th no v mch in vi Layout Plus, v cc thao tc hiu chnhmch cho ng vi yu cu thit k ca chng ta.

huong dan ve mach in su sung orcad9[1].0 _2

Documents

Transcript of huong dan ve mach in su sung orcad9[1].0 _2