Ku Cusub iyo Mid Asal ah oo ku jira TCAN1042VDRQ1 Qaybaha Elektarooniga ah Isku-dhafka Wareegga Ics asalka 1- 7 Adeegga Liiska BOM ee Hal Joogsi ah

Ku-tallaaliyeyaasha CAN ee go'doonsan, gelinta ayaa inta badan tixraacaysa sifooyinka wax-gelinta ee dhinaca kontoroolka CAN ee isku xirka, oo ka kooban gelinta korantada iyo gelinta calaamadda.

Iyada oo ku xidhan korantada Interface-ka CAN ee kontaroolaha waxaa la dooran karaa moduleka CAN ee 3.3V ama 5V.Kala duwanaanshaha wax gelinta caadiga ah ee cutubka CAN ee go'doonsan waa VCC ± 5%, inta badan iyadoo la tixgelinayo in heerka baska CAN lagu hayn karo inta u dhexeysa qiimaha caadiga ah iyo sidoo kale samaynta qalabka CAN-da sare ee ka shaqeeya agagaarka tamarta sahayda magac ahaaneed.

Chips transceiver CAN oo kala duwan, VIO pin ee chip wuxuu u baahan yahay in lagu xidho danab tixraaceed la mid ah heerka signalka TXD si uu u dhigma heerka signalka, ama haddii aanu jirin pin VIO, heerka signalka waa in lagu hayaa si waafaqsan VCC. .Marka la isticmaalayo taxanayaasha CTM ee go'doonsan transceivers waa lagama maarmaan in la waafajiyo heerka signalka TXD iyo danab sahayda, ie 3.3V heerka kontoroolka CAN interface ama 5V heerka CAN interface interface.

Astaamaha gudbinta

Sifooyinka gudbinta ee gudbiyaha CAN waxay ku saleysan yihiin saddex cabbir: gudbin dib u dhac, hel dib u dhac, iyo dib u dhac wareeg ah.

Markaad dooranayso transceiver CAN waxaan u qaadaneynaa in cabbirka daahitaanka yari uu ka fiican yahay, laakiin faa'iidooyinkee ayay keenaysaa dib u dhigista gudbinta yar iyo arrimo noocee ah ayaa xaddidaya daahitaanka gudbinta ee shabakadda CAN?

Xeerka CAN, noodhka diritaanka ayaa xogta ku soo diraya TXD halka RDX ay la socoto gobolka baska.Haddii xoogaa korjoogaha RDX uusan u dhigmin qaybta gudbinta, noodhka ayaa ogaanaya waxoogaa khalad ah.Haddii waxa lagu ilaaliyo goobta dhexdhexaadinta aysan u dhigmin gudbinta dhabta ah, noodhka ayaa joojinaya gudbinta, tusaale ahaan waxaa jira noodes badan oo baska diraya xogta isla mar ahaantaana halka noodhka aan la siinin mudnaanta gudbinta xogta.

Sidoo kale, labadaba hubinta xogta iyo qaybinta jawaabta ACK, RDX waxaa looga baahan yahay inay hesho heerka xogta baska wakhtiga dhabta ah.Tusaale ahaan, isgaadhsiinta shabakada caadiga ah, marka laga reebo cilladaha noodhka, si loo helo jawaabta ACK si kalsooni leh, waa lagama maarmaan in la hubiyo in ACK-ga loo wareejiyo diiwaanka RDX ee kontaroolaha wakhti go'an gudahooda, haddii kale, noodhka diritaanka ayaa noqon doona. ogaada qaladka jawaabtaU deji booska muunada ilaa 70% at 1Mbps.Kadib koontarooluhu wuxuu muunad ku samayn doonaa xoogaa ACK ah 70% marka laga bilaabo bilawga wakhtiga ACK bit, tusaale ahaan dib u dhaca meertada dhamaan shabakada CAN waa inay ka yaraataa 700ns, laga bilaabo wakhtiga TXD soo diro, ilaa ACK xoogaa waxaa laga helaa RDX.

Shabakadda CAN ee go'doonsan, cabbirkan waxaa inta badan go'aamiya daahitaanka go'doominta, daahitaanka darawalka CAN, iyo dhererka fiilada.Wakhti yar oo daahitaan ah, sidaa darteed, waxa ay caawisaa in si la isku halleyn karo muunado ACK-yada iyo in la kordhiyo dhererka baska.Jaantuska 2 waxa uu tusinayaa jawaabta ACK ee labada nood ee isgaadhsiinta isticmaalaya transceiver CTM1051KAT.Waqtiga daahitaanka caadiga ah ee ku jira transceiverku waa ku dhawaad ​​120ns.