computer-kho-london

Cov hauv paus ntsiab lus ntawm cov ntawv luam tawm Circuit Board (PCB) layout

Hauv kev xyaum tsim qauv ntev, tib neeg tau sau ntau txoj cai.Yog tias cov ntsiab lus no tuaj yeem ua raws li hauv Circuit Court tsim, nws yuav muaj txiaj ntsig zoo rau qhov tseeb debugging ntawm lubPrinted Circuit Board (PCB)tswj software thiab kev ua haujlwm ib txwm muaj ntawm cov khoom siv hluav taws xob.Hauv kev xaus, cov ntsiab cai yuav tsum tau ua raws li hauv qab no:

(1) Nyob rau hauv cov nqe lus ntawm layout ntawm lub Cheebtsam, lub Cheebtsam muaj feem xyuam rau ib leeg yuav tsum tau muab tso rau ze li sai tau.Piv txwv li, moos generator, siv lead ua oscillator, moos input kawg ntawm CPU, thiab lwm yam, yog nquag ua suab nrov.Thaum muab tso rau, lawv yuav tsum muab tso ze dua.

(2) Sim rau nruab decoupling capacitors ib sab ntawm cov khoom tseem ceeb xws li ROM, RAM thiab lwm yam chips.Cov ntsiab lus hauv qab no yuav tsum tau muab sau tseg thaum muab cov capacitors decoupling:

1) Lub zog tawm tswv yim kawg ntawm cov ntawv luam tawm Circuit Board (PCB) yog sib koom ua ke rau lub tshuab hluav taws xob electrolytic ntawm txog 100uF.Yog tias qhov ntim tso cai, lub peev xwm loj dua yuav zoo dua.

Ib nrab qhov PCB

2) Raws li txoj cai, 0.1uF ceramic nti capacitor yuav tsum muab tso rau ntawm ib sab ntawm txhua IC nti.Yog tias qhov sib txawv ntawm lub rooj tsav xwm luam tawm (PCB) tsawg dhau los muab tso, 1-10uF tantalum capacitor tuaj yeem muab tso rau ib ncig ntawm txhua 10 chips.

3) Rau cov khoom uas tsis muaj zog tiv thaiv kev cuam tshuam thiab cov khoom siv khaws cia xws li RAM thiab ROM nrog qhov hloov pauv loj tam sim no thaum tua, decoupling capacitors yuav tsum tau txuas ntawm cov kab hluav taws xob (VCC) thiab hauv av xaim (GND).

4) Lub capacitor lead yuav tsum tsis txhob ntev dhau.Hauv particular, high zaus luam tawm Circuit Board (PCB) bypass capacitors yuav tsum tsis txhob nqa cov coj.

(3) Cov khoom sib txuas feem ntau muab tso rau ntawm ntug ntawm lub rooj tsav xwm Circuit Court kom yooj yim rau kev teeb tsa thiab xaim ua haujlwm tom qab.Yog tias tsis muaj txoj hauv kev, nws tuaj yeem muab tso rau hauv nruab nrab ntawm lub rooj tsavxwm, tab sis sim kom tsis txhob ua li ntawd.

(4) Hauv phau ntawv layout ntawm cov khoom, qhov yooj yim ntawm kev xaim yuav tsum tau txiav txim siab kom deb li deb tau.Rau cov cheeb tsam uas muaj kev sib txuas ntau dua, qhov chaw txaus yuav tsum tau muab tso tseg kom tsis txhob muaj kev thaiv kev thaiv.

(5) Digital Circuit Court thiab analog Circuit Court yuav tsum tau teem rau hauv ntau cheeb tsam.Yog tias ua tau, qhov chaw ntawm 2-3mm ntawm lawv yuav tsum tsim nyog kom tsis txhob muaj kev cuam tshuam.

(6) Rau circuits nyob rau hauv siab thiab tsis tshua muaj siab, ib qhov chaw ntawm ntau tshaj 4 hli yuav tsum tau muab tso rau ib sab ntawm lawv nyob rau hauv thiaj li yuav xyuas kom meej txaus hluav taws xob rwb thaiv tsev kev ntseeg tau.

(7) Cov txheej txheem ntawm cov khoom yuav tsum zoo nkauj thiab zoo nkauj li sai tau.

 


Post lub sij hawm: Nov-16-2020