Hloov lub USB cable koj tus kheej hauv tsev yog nqa tawm ntawm tus neeg siv nws tus kheej txoj kev pheej hmoo thiab pheej hmoo, vim qhov no yog ib txoj haujlwm rau cov neeg uas muaj qee yam kev paub tshwj xeeb hauv xov tooj cua engineering. Qhov no feem ntau yuav tsum tau ua rau cov xov tooj hluav taws xob rov qab uas tsis yog npaj rau flashing, piv txwv li, Suav lub xov tooj.
Tsim nyog
- - ntxiv USB cable;
- - tes haujlwm;
- - txoj kab ntawm cov PL-2303 microcircuit.
Cov Lus Qhia
Kauj ruam 1
Yuav cov USB txuas ntxiv los siv ncaj qha rau hauv cov txheej txheem. Yuav ib qho Profilic type cable txuas ntxiv rau ntawm PL-2303 microcircuit lossis zoo ib yam rau nws. Nco ntsoov tias cov xov hlau tsis muaj lub ntsej muag qub ICs yuav tsis ua haujlwm.
Kauj ruam 2
Nrhiav cov pinout ntawm cable (nws cov neeg tiv tauj). Feem ntau, cov ntaub ntawv no yooj yim nrhiav hauv Is Taws Nem, tshwj xeeb hauv cov xaib gsmforum.ru lossis unlockers.ru. Yog tias koj tsis tau pom qhov Circuit Court uas koj xav tau, ib qho tsim los ntawm koj tus kheej yuav ua.
Kauj ruam 3
Kaw koj lub xov tooj, ntxig lub roj teeb them tag nrho. Ua ib tus pinout uas yuav phim koj cov qauv cuab yeej tshwj xeeb, ntawm no koj yuav tau siv lub tshuab ntsuas, ohmmeter lossis voltmeter.
Kauj ruam 4
Nrhiav GND. Hauv lub tshuab ntsuas, hloov hom hloov los txiav txim siab qhov tsis kam (yuav tsum tsis pub tshaj 2000 kOhm) ntawm qhov rho tawm ntawm lub roj teeb txuas rau hauv lub xov tooj thiab txav mus rau lwm qhov kawg dua ntawm cov neeg tiv tauj ntawm koj lub cable qhov twg cov ntsuas nyeem tau yuav nyob 0 - qhov no muab cov. Nws tseem yog qhov yooj yim nrhiav tau los ntawm kev rho tawm cov txuas ntawm ntawm lub cable uas txuas rau lub xov tooj txawb. Hauv qhov no, nws yuav yog cov xaim dub.
Kauj ruam 5
Ntawm cov ntsuas multimeter, teeb tsa hom rau saib qhov ntsuas hluav taws xob (DCV, 20V), qhov no yog qhov tsim nyog los tshawb VCC. Tuav ib qhov kawg rau GND thaum khiav sib nraus dhau txhua lwm pins tib lub sijhawm. Thaj chaw uas muaj roj teeb hluav taws xob ntau tshaj plaws yuav yog VCC.
Kauj Ruam 6
Tso rau multimeter rov qab rau hauv qhov ntsuas kev ntsuas voltage, teem ib qho sib cuag rau GND thiab rub qhov sib hla txhua qhov pins, txhua zaus kov tus tshiab, nias lub khawm pib ntawm koj lub xov tooj, tab sis tsis tig nws, tab sis tsuas yog nias ib zaug.
Kauj Ruam 7
Nrhiav cov pins qhov twg qhov voltage yuav 2.7-2.8 V, qhov no yuav yog RX thiab TX. Tom qab ntawd cam GND, RX thiab TX rau pawg thawj coj saib. Koj txoj kab xim liab tau npaj lawm thiab tam sim no siv tau rau flashing.
