RS-232 ikhebula: incazelo, niznachenie, Ukucaciswa

ngqó, impendulo ingu-RS-232 ikhebula - yigama endinganisweni uchaza esibonakalayo futhi lwenethiwekhi kusuka PC kudivayisi idatha. RS - standard Kunconywa, elihunyushwe ngokuthi "Kunconywa ejwayelekile", futhi 232 - uhlobo inombolo. Lwakhiwe ku 60s kwekhulu elidlule. Namuhla, inguqulo entsha le ndinganiso, lowemukela ngo-1991 inhlangano zokuxhumana ngocingo kanye electronics izimboni, ubizwa ngokuthi EIA / TIA-232-E ezaziwayo. Nokho, iningi labantu uqhubeke ukusebenzisa "ikhebula RS-232," igama 'ugxilile "interface.

Esibonakalayo ngenhla inikeza elibona nxazonke kumadivayisi alandelayo: DTE (Idatha Terminal Izinsiza kusebenza) - lo DTE (Idatha Terminal Izinsiza kusebenza), kanye DCE (Data Communications Izinsiza kusebenza) - CPD (idatha imishini ukudluliswa). Ngaphansi DTE ngokuvamile kusho ikhompyutha siqu, futhi ngaphansi cap - kokuhlela imodemu. Nakuba ikhebula RS-232 liyasetshenziswa ukuxhuma kwi-PEOM nezinye okuphathelene nomngcele (iphrinta, igundane, nokunye. D.), Futhi ukuxhuma amanye amakhompyutha noma abalawuli. Kubalulekile ukukhumbula DCE kanye DTE namagama, njengoba asetshenziswe kule amagama amasignali esibonakalayo futhi usize ukubhekana incazelo zedivayisi edingekayo.

Ekuqaleni, RS-232 ikhebula has a 25-pin Isixhumi hlobo DB25. DTE uhlobo apharathasi zalala isixhumi-isokhethi ( "umama"). Kamuva baqala ukusebenzisa "usike phansi" inguqulo kokusetshenziswa kubonwa ne 9-pin DB9. Lolu hlobo ikhebula kuvamile izinsuku zethu.

Wiring ikhebula RS-232

Ngezansi esibulalayo isabelo 9 kontaktngo uhlobo DB9 isixhumi. Uhlu ikhombisa pinout isixhumi ( "daddy") idatha processing imishini efana ikhompyutha siqu. Rosette ukuthumela idatha kudivayisi unsoldering ukuze kokubili nezixhumi zihlangene nge ikhebula noma ngokuqondile "contact in contact".

1. I-Carrier Thola - khona imvamisa yenethiwekhi.

2. Tholakele Data - sithole idatha.

3. ezithathelana Data - idatha kokuba ngocansi.

4. Idatha Terminal Ready - ukulungela LTD.

5. esiginali Ground - Imininingwane.

6. Data Set Funda - ukuzimisela HPD.

7. Cela Ukuthumela - isicelo sokudlulisa.

8. ClearToSend - ulungele ukuthumela.

9. Ring Inkomba - khona isignali ucingo.

Idatha wadluliselwa izifunda RD futhi TD. Izifunda asele zenzelwe ukubonisa DTR isimo kanye namadivayisi DSR, ukulawula ukudluliswa CTS futhi RTS, kanye isimo ukubonisa RI futhi CD imigqa. Kuphela uma uxhumeke kwi-PC esebenzisa i imodemu zangaphandle, onazo zonke ngamaketanga. Uma uxhuma kunoma nezinye okuphathelene nomngcele ezifana abalawuli noma i-mouse, sebenzisa wesifunda abakhethayo adingekayo imishini ethize. Bona kuxhomeke hardware ne-software zedivayisi.

Incazelo kanye lobuchwepheshe nemingcele

Standard ichaza ngokusobala kobude obuphelele kungenzeka ikhebula RS-232 - 15 amamitha ngesilinganiso idatha ye 9600 kancane / s. Nokho, umkhuba ke iqinisekisiwe ukuthi operation esitebeleni ibangelwa futhi ngesikhathi obuphelele enkulu wire. Kukholakala ukuthi isicelo i unshielded ikhebula obuphelele zingandiswa kuya ku-30 metres, futhi lapho esebenzisa kwakuvikela - 75 amamitha. Futhi lokhu ngaphandle kokulahlekelwa izinga idatha. Uma ijubane aphansi imayelana kabili, ubude ikhebula luyanda kanye kabili. Kunconywa ukuba sebenzisa intambo ezisekelwe ezisontekile-pair ikhebula, Kulezo zimo, umugqa isignali ngalinye abhanqiwe ngocingo ezivamile. It is hhayi Kunconywa ukuba sihlanganise isihlangu ikhebula isignali ezivamile.

Ngokuvamile, uyakwazi ukuthola RS-232- ikhebula le-USB. Kuyinto esibonakalayo ejwayelekile esiphethweni esisodwa esebenzisa i-isixhumi se-USB.