1. Chip nepurogiramu
1. EPROM machipisi kazhinji haana kukodzera kukuvara.Nekuti iyi mhando yechip inoda ultraviolet mwenje kudzima chirongwa, haizokuvadza chirongwa panguva yekuyedzwa.Zvisinei, kune ruzivo: nekuda kwezvinhu zvinoshandiswa kugadzira chip, sezvo nguva inofamba neNguva refu), kunyange kana isina kushandiswa, inogona kukuvadzwa (kunyanya inoreva purogiramu).Saka zvinodikanwa kuitsigira zvakanyanya sezvinobvira.
2. EEPROM, SPROM, nezvimwewo, pamwe chete ne RAM chips nemabhatiri, zviri nyore kwazvo kuparadza purogiramu.Kunyangwe machipisi akadaro achaparadza chirongwa mushure mekushandisa iyokuongorora VI curve haisati yapera.Zvisinei, vatinoshanda navo Kana tikasangana nemhando yemamiriro ezvinhu, zviri nani kungwarira.Munyori akaita zviedzo zvakawanda, uye chikonzero chingangove chiri: kuvuza kwegoko rechishandiso chekugadzirisa (senge tester, electric soldering iron, nezvimwewo).
3. Kune chip nebhatiri pabhodhi redunhu, usabvisa kubva pabhodhi nyore nyore.
2. Reset circuit
1. Kana pane yakakura-yakasanganiswa yedunhu pabhodhi redunhu kuti igadziriswe, kutarisisa kunofanirwa kubhadharwa kune dambudziko rekugadzirisa.
2. Pamberi pekuedzwa, zvakanakisisa kuidzorera zvakare pachigadziro, shandura uye uvhare muchina kakawanda uye edza.Uye tinya bhatani reset kakawanda.
3. Basa uye parameter test
1.inogona kungoratidzira iyo yakachekwa-nzvimbo, nzvimbo yekusimudzira uye saturation nzvimbo pakuona mudziyo.Asi haigone kuyera iwo chaiwo maitiro senge yekushanda frequency uye kumhanya.
2. Nenzira imwecheteyo, nokuda kweTTL digital chips, chete kubudiswa kwekuchinja kwepamusoro uye kuderera kwemazinga kunogona kuzivikanwa, asi kukurumidza kwekukwira kwayo uye kudonha kwemiganhu hakugoni kuonekwa.
4. Crystal oscillator
1. Kazhinji chete oscilloscope (iyo crystal oscillator inoda kushandiswa pairi) kana kuti frequency mita inogona kushandiswa pakuedza, uye multimeter haigoni kushandiswa kuyerwa, kana zvisina kudaro nzira yekutsiva inogona kushandiswa chete.
2. Izvo zvinowanzoitika zvikanganiso zvecrystal oscillator ndezvi: a.kudonha kwemukati, b.yemukati yakavhurika dunhu, c.kutsauka kwemaitiro akasiyana, d.kuvuza kweperipheral yakabatana capacitors.Iyo leakage phenomenon pano inofanirwa kuyerwa neVI curve ye.
3. Nzira mbiri dzekutonga dzinogona kushandiswa mukuedzwa kwebhodhi rose: a.Munguva yekuedzwa, machipisi ane hukama padhuze nekristaro oscillator anokundikana.b.Hapana mamwe mapoinzi ekukanganisa anowanikwa kunze kwekristaro oscillator.
4. Kune marudzi maviri akajairika ekristaro oscillator: a.mapini maviri.b.mapini mana, ayo pini yechipiri inofambiswa, uye kutarisa hakufanirwe kupfupika-kutenderera pakuda.Shanu.Kuparadzirwa kwezviitiko zvinokanganisa 1. Nhamba dzisina kukwana dzezvikamu zvakakanganisika zvebhodhi redunhu: 1) chip kukuvara 30%, 2) discrete zvikamu zvinokuvadza 30%,
3) 30% yewaya (PCB coated copper wire) yakaputsika, 4) 10% yepurogiramu yakakuvadzwa kana kurasika (kune kukwira kumusoro).
2. Zvinogona kuonekwa kubva pamusoro apa kuti kana pane dambudziko nekubatana uye purogiramu yedare redunhu kuti rigadziriswe, uye hapana bhodhi rakanaka, risingazivi nezvekubatana kwayo, uye haigoni kuwana purogiramu yepakutanga, iyo inogona kuitika. yekugadzira bhodhi haisi yakakura.
Nguva yekutumira: Mar-06-2023