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- Answer_to_reset abstract "An Answer To Reset (ATR) is a message output by a contact Smart Card conforming to ISO/IEC 7816 standards, following electrical reset of the card's chip by a card reader. The ATR conveys information about the communication parameters proposed by the card, and the card's nature and state.By extension, ATR often refers to a message obtained from a Smart Card in an early communication stage; or from the card reader used to access that card, which may transform the card's message into an ATR-like format (this occurs e.g. for some PC/SC card readers when accessing an ISO/IEC 14443 Smart Card).The presence of an ATR is often used as a first indication that a Smart Card appears operative, and its content examined as a first test that it is of the appropriate kind for a given usage.Contact Smart Cards communicate over a signal named Input/Output (I/O) either synchronously (data bits are sent and received at the rhythm of one per period of the clock supplied to the card on its CLK signal) or asynchronously (data bits are exchanged over I/O with another mechanism for bit delimitation, similar to traditional asynchronous serial communication). The two modes are exclusive in a given communication session, and most cards are built with support for a single mode. Microprocessor-based contact Smart Cards are mostly of the asynchronous variety, used for all Subscriber Identity Modules (SIM) for mobile phones, all bank cards with contacts conforming to EMV specifications, all contact Java Cards, and Smart Cards for pay television. Memory-only cards are generally of the synchronous variety.ATR under asynchronous and synchronous transmission have entirely different form and content. The ATR in asynchronous transmission is extensively normalized, and relatively complex to parse.Some Smart Cards (mostly of the asynchronous variety) have different ATR depending on if the reset is the first since power-up (Cold ATR) or not (Warm ATR).Note: Answer To Reset should not be confused with ATtRibute REQuest (ATR_REQ) and ATtRibute RESponse (ATR_RES) of NFC, also abbreviated ATR. ATR_RES conveys information about the communication parameters supported, as does Answer To Reset, but its structure is different.".
- Answer_to_reset wikiPageID "16000232".
- Answer_to_reset wikiPageRevisionID "605209117".
- Answer_to_reset hasPhotoCollection Answer_to_reset.
- Answer_to_reset subject Category:Smart_cards.
- Answer_to_reset type Abstraction100002137.
- Answer_to_reset type Assets113329641.
- Answer_to_reset type Communication100033020.
- Answer_to_reset type ConsumerCredit113374426.
- Answer_to_reset type Credit113378518.
- Answer_to_reset type CreditLine113379413.
- Answer_to_reset type Evidence106643408.
- Answer_to_reset type Identification106885083.
- Answer_to_reset type Indication106797169.
- Answer_to_reset type Open-endCredit113375323.
- Answer_to_reset type PositiveIdentification106885389.
- Answer_to_reset type Possession100032613.
- Answer_to_reset type Relation100031921.
- Answer_to_reset type SmartCard113377003.
- Answer_to_reset type SmartCards.
- Answer_to_reset comment "An Answer To Reset (ATR) is a message output by a contact Smart Card conforming to ISO/IEC 7816 standards, following electrical reset of the card's chip by a card reader.".
- Answer_to_reset label "Answer to Reset".
- Answer_to_reset label "Answer to reset".
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- Answer_to_reset sameAs Q570445.
- Answer_to_reset sameAs Q570445.
- Answer_to_reset sameAs Answer_to_reset.
- Answer_to_reset wasDerivedFrom Answer_to_reset?oldid=605209117.
- Answer_to_reset isPrimaryTopicOf Answer_to_reset.