Công nghệ giao tiếp tầm ngắn NFC

Cng Ngh NFC

11Thit b u cuiCh : Cng ngh NFCNhm 15Nguyn Th HngTrn Th T OanhNguyn B QunhNguyn ng TngGVHD: Ths.Trn V KinNi Dung:1- Gii thiu v NFC2- Cu to3- Hot ng4- ng dng5- So snh vi Bluetooth6- Video lin quan21- Gii thiu v NFCNFC l g?

NFC (Near-Field Communications) l cng ngh kt ni khng dy phm vi tm ngn trong khong cch 4 cm, s dng cm ng t trng thc hin kt ni gia cc thit b khi c s tip xc trc tip hay gn nhau vi tn s 13,56MHz.

31- Gii thiu v NFC (tip)NFC c pht trin da trn nguyn l nhn dng bng tn hiu tn s v tuyn (Radio-frequency identification - RFID).Hot ng di bng tn 13.56 MHz v tc truyn ti d liu ti a 424 Kbps.Do khong cch truyn d liu kh ngn nn giao dch qua cng ngh NFC c xem l an ton.Thit b c trang b NFC thng l in thoi di ng, c th giao tip vi cc th thng minh, u c th hoc thit b NFC tng thch khc.

42- Cu to NFC

Hnh 2 : NFC trong in thoi di ng55Th NFC , v d dn hoc dy eo c tay , c cha cc vi mch nh vi dy ngten nh m c th lu tr mt lng nh thng tin chuyn n mt thit b NFC , chng hn nh in thoi di ng .

2- Cu to (tip)

62- Cu to(tip)Hnh 3 : Cu to ca NFC

Analog circuitary output driver: x l iu ch v gii iu ch cho tn hiu tng t.UART: giao thc yu cu.FIFO BUFFER: truyn d liu nhanh v thun tin t HOST ti UART v ngc li.Status control: cho php qun l c lp c hai giao tip ca giao din RF v giao din HOST.HOST interface: c thc hin p ng cc yu cu khc nhau ca khch hng7

3-Hot ng

NFC hot ng, chng ta buc phi c 2 thit b, 1 l thit b khi to (initiator) v thit b th 2 l mc tiu (target).

Initiator s ch ng to ra nhng trng sng radio (bn cht l bc x in t) cung cp nng lng cho target vn hot ng ch b ng. Mt thit b th ng, chng hn nh mt th NFC, cc thit b khc c th c c cc thng tin trn n nhng chnh n khng th c bt k thng tin no.Mt thit b ch ng c th c thng tin v gi n. V d nh in thoi thng minh, n khng ch c thu thp thng tin t cc th NFC m n cn c th trao i thng tin vi cc thit b hay in thoi tng thch khc, n cn c th thay i thng tin trong cc th NFC nu c php.

83- Hot ng(tip)Ch NFC ch ng: C hai thit b khi to v mc tiu u lun phin to ra trng RF ring ca chng.

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3- Hot ng(tip)Ch NFC ch ng:103- Hot ng(tip)Ch NFC th ng: Thit b khi to cung cp mt trng mang RF v thit b mc tiu s s dng n tr li.

11Ch NFC th ng:3- Hot ng(tip)

124 - ng dng

134 - ng Dng(tip)1. Touch and Go (v d nh chm vo m ca).

2. Touch and Confirm (b sung thm mt lp bo mt cho thanh ton di ng, chng hn nh nhp m PIN xc nhn thanh ton).

143. Touch and Connect (chia s d liu vi mt thit b khc) .

4. Touch and Explore (khm ph nhng dch v c cung cp).

4 - ng Dng(tip)155. So snh vi bluetooth

166. Video lin quan17

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6. Video lin quan(tip)Ti liu tham kho:http://www.ascendia.ro/work/eLearning/mobile_nfchttp://www.slideshare.net/http://kimtag.com/s/nfc_tags

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