Hi Shekhar, very good response!!! On 18 May 2011 10:10, Michael Roland <[email protected]> wrote:
> Hallo Shekhar, > > NDEF is a data exchange format for NFC (NDEF = NFC Data Exchange > Format). It can be used with NFC tags (reader-writer mode) and in peer- > to-peer mode. > > The NFC Forum Type tag formats specify a standardized way to store > NDEF data (and possibly other data) onto certain tags. So these > specifications define the tags' data structures and commands to access > the data. The four tag types are based on previously existing vendor > specific RFID tag types: > > NFC Forum Tag Type 1 is based on Innovision Topaz/Jewel > NFC Forum Tag Type 2 is based on NXP MIFARE Ultralight > NFC Forum Tag Type 3 is based on Sony FeliCa > NFC Forum Tag Type 4 is based on APDU-based smart cards > > Besides these standard tag types NXP released application notes that > define ways to store NDEF formatted data onto other RFID tag types > (application notes are available for MIFARE Classic and for ICODE). > > As the tag types are based on existing RFID tag technologies, they > also correspond to certain RFID/smartcard standards: > > NFC Forum Tag Type 1 sits on top of ISO/IEC 14443-3 Type A (but > without anti-collision!) > NFC Forum Tag Type 2 sits on top of ISO/IEC 14443-3 Type A > NFC Forum Tag Type 3 sits on top of JIS X 6319-4 > NFC Forum Tag Type 4 sits on top of ISO/IEC 14443-4 and ISO/IEC 7816-4 > > Corresponding to the ISO NFC standards (ISO/IEC 18092, ...), the NFC > Forum combined certain RFID standards to the NFC Digital Protocol. The > digital protocol has three RFID technologies named NFC-A, NFC-B and > NFC-F: > > NFC-A matches the RFID standard ISO/IEC 14443-3 Type A > NFC-B matches the RFID standard ISO/IEC 14443-3 Type B > NFC-F matches the RFID standard FeliCa JIS X 6319-4 (or rather those > parts of that standard that were incorporated by ISO/IEC 18092) > > Additionally, the Nexus S (or the NXP chip thats inside it) > understands a forth RFID technology that uses the same frequency as > NFC but is that not really related to NFC: ISO/IEC 15693 (called NFC-V > in the Android API, where V stands for Vicinity as the ISO standard > refers to this technology as vicinity cards). > > ISO-DEP is the data exchange protocol on top of ISO/IEC 14443-4. It is > based on the same command exchange protocol that is used with contact > smartcards: ISO/IEC 7816-4. ISO/IEC 14443-4 joins the two low-level > protocols defined in ISO/IEC 14443-3 into one common high-level > protocol. > > br, > Michael > > -- > You received this message because you are subscribed to the Google > Groups "Android Developers" group. > To post to this group, send email to [email protected] > To unsubscribe from this group, send email to > [email protected] > For more options, visit this group at > http://groups.google.com/group/android-developers?hl=en > -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
