Sorry... Michael On 18 May 2011 10:44, iñaki <[email protected]> wrote:
> 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
