Dab tsi yog qhov voltage ntawm FTDI USB rau serial chaw nres nkoj?

1, Fais fab mov voltage ntau
Lub hwj chim mov voltage ntau ntawm FTDI USB rau serial nti (xws li FT232RL) yog ib qho ntawm cov cim tseem ceeb ntawm nws kev ua haujlwm ruaj khov. Raws li cov ntaub ntawv raug cai thiab kev pom zoo ntawm kev lag luam, lub zog hluav taws xob ntawm cov chips no feem ntau muaj qee qhov kev hloov pauv kom tau raws li qhov xav tau ntawm cov ntawv thov sib txawv. Tshwj xeeb, qhov siab tshaj plaws DC fais fab mov voltage ntawm chips xws li FT232RL tuaj yeem ncav cuag 5.25V, thaum qhov tsawg kawg nkaus yog 3.3V. Qhov no txhais tau hais tias nyob rau hauv feem ntau cov khoom siv hluav taws xob siv hluav taws xob ib puag ncig, cov chips no tuaj yeem ua haujlwm ib txwm tsis tas yuav muaj qhov hloov pauv hloov hluav taws xob ntxiv.
2, I / O chaw nres nkoj theem txhawb nqa ntau yam
Ntxiv rau qhov hluav taws xob muab hluav taws xob, I / O chaw nres nkoj theem txhawb nqa ntau yam ntawm FTDI USB rau serial chaw nres nkoj nti kuj yog ib qho tseem ceeb ntawm nws cov yam ntxwv voltage. Cov chips no feem ntau koom ua ke cov qib hloov pauv, tso cai rau lawv qhov chaw nres nkoj I / O kom txhawb nqa qhov dav dav. Piv txwv li, chips xws li FT232RL txhawb I / O chaw nres nkoj theem ntawm 5V txog 2.8V, uas tso cai rau lawv yooj yim txuas thiab tsav ntau yam khoom siv sab nraud, tsis hais lawv cov qauv qib.
3, Kev cuam tshuam ntawm cov yam ntxwv voltage ntawm cov ntaub ntawv xa mus
Cov yam ntxwv voltage ntawm FTDI USB rau serial chaw nres nkoj chips muaj qhov cuam tshuam loj rau cov ntaub ntawv xa mus. Ua ntej, qhov ruaj khov fais fab mov voltage yog lub hauv paus rau kev ua haujlwm zoo ntawm cov nti, thiab kev hloov pauv ntawm lub zog hluav taws xob tuaj yeem ua rau cov ntaub ntawv xa mus tsis raug lossis nti puas. Yog li ntawd, thaum tsim thiab siv cov chips no, nws yog ib qho tsim nyog los xyuas kom meej tias lawv lub zog hluav taws xob voltage nyob rau hauv qhov kev teev tseg thiab txo cov suab nrov thiab cuam tshuam ntau npaum li sai tau.
Qhov thib ob, kev sib raug zoo ntawm I / O chaw nres nkoj theem kuj tseem ceeb heev rau kev ua kom ruaj khov cov ntaub ntawv xa mus. Vim qhov tseeb tias cov khoom siv sib txawv tuaj yeem siv cov qauv sib txawv, FTDI USB rau serial chaw nres nkoj nti txhim kho kev sib cuam tshuam ntawm cov khoom siv los ntawm kev txhawb nqa ntau qib. Qhov no tso cai rau cov neeg tsim khoom kom muaj kev hloov pauv ntau dua hauv kev xaiv thiab siv cov khoom siv sab nraud yam tsis muaj kev txhawj xeeb txog qib incompatibility.
4, Daim ntawv thov ceev faj
Thaum siv FTDI USB rau serial chaw nres nkoj nti, nws yog ib qho tseem ceeb uas yuav tau xyuam xim rau cov ntsiab lus hauv qab no kom ntseeg tau tias nws cov yam ntxwv voltage tau siv tag nrho:
Xyuas kom ruaj khov fais fab mov voltage: Tsis txhob muaj qhov hloov pauv ntau dhau los yog tshaj qhov teev ntawm cov khoom siv hluav taws xob kom tsis txhob cuam tshuam rau kev ua haujlwm ntawm cov nti.
Xaiv ib theem tsim nyog converter: Yog tias koj xav tau txuas cov khoom siv nrog cov qauv sib txawv, koj tuaj yeem xaiv tus hloov qib tsim nyog rau kev hloov kho kom ruaj ntseg ntawm cov ntaub ntawv xa mus.
Ua tib zoo mloog cov teeb liab kev ncaj ncees: Thaum lub sij hawm high-ceev cov ntaub ntawv kis tau tus mob, nws yog ib qho tsim nyog yuav tsum tau xyuam xim rau cov teeb meem kev ncaj ncees xws li kev xav, crosstalk, thiab lwm yam.