ISO/IEC specifies the power and signal structures, and information exchange between an integrated circuit card and an interface device such as a. ISO/IEC was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology, Subcommittee SC 17, Cards and personal identification. There is currently a proposed revision to the ISO to remove ambiguities and to ensure an effective method of operation for changing the protocol type.
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During the Answer to Reset, the delay between the start leading edges of two consecutives characters from the card shall not exeed etu.
For this protocol, data can only flow in one direction for the command response pair. According to its abstract, it specifies a card application. Commands for card management”.
When PI2 is present, the indication of PI1 should be ignores. Although the first comment is correct in principle, I do see that knowledge of this protocol is required to develop against a smart card.
If internal reset is implemented, the voltage supply on Vcc is mandatory. Next data byte is transferred subsequently. The PTS command must be issued immediately after the answer to reset and only applies when the IC card 7816–3 in the negotiable mode.
An internally reset card reset after a few cycles of clock signal. The coding of this byte when present is shown in figure Other values of PI2 are reserved for future use. The card may optionally send a NULL procedure byte 60hex which allows further time for the processing of the command. The chronological order of transmission of information bits shall correcpond to bit identification b1 to b32 with the least significant bit transmitted first.
The normal response is: According to its abstract, it specifies interindustry commands for integrated circuit cards both with contacts and without contacts for card and file management, e.
Initial character TS Structure of the subsequent characters in the Answer to Reset ————————————————————- The initial character TS is followed by a variable number of subsequent characters in the following order: N is an extra guardtime requested by the card.
If bit 5 of the PTS1 response character is set to zero then the default values of F and D will be used. The interface characters specify physical parameters of the integrated circuit in the card and logical characteristics of the subsequent exchange protocol.
The default values for F1 and D1 are 1 which is defined in the tables to give a value for F of and D of 1. The block protocol also has a more sophisticated error management system. It requests no further action neither on VPP nor on Data.
For internal clock cards: Easy chip card integration with our smart card. Low level output voltage tr: Historical characters max,15 TCK: In order to read the initial character TSall cards shall initially be operated with fi in the range of 1 MHz to 5 MHz. The operation of these mode changes are shown in figure If there is no compatibility, the contacts shall be desactivated.
Therefore the design of the card has to avoid inproper operation. Cards with contacts — Physical characteristics”. An alternate measurement of etu is a third of the delay between the first two falling edges in TS. N codes directly the extra guard time, from 0 to etu. Structure of the subsequent characters in the Answer to Reset ————————————————————- The initial character TS is followed by a variable number of subsequent characters in the following order: The format of the TS character is shown in figure This is one of the major issues with ISO It is only send to indicate to the interface device IFD what to do.
When it is required to transfer data in both directions for a particular command then a “get response” command may be used after the primary command to recover the response data. The last 3 bits bg bh bi shall be AAZ for checking parity. Created inupdated in The choice of communication protocol for the ICC is still a hot topic and one has to consider what advantages can be offered by the block protocol and then to examine the price that must be paid.
In other projects Wikimedia Commons. Commands for application management in a multi-application environment”.
ISO/IEC – Wikipedia
After the reset signal is applied by the interface device the IC card responds with an answer to reset. Other values are reserved for future use by ISO These commands cover the entire life cycle of the card and therefore some commands may be used before the card has been issued to the cardholder or after the card has expired. Interaction between the interface device and the ICC results in successive commands and responses. A new concept is proposed which 781-3 the principle of two modes of operation: Bit b2 set to 0 is the default and indicates that no extra guardtime is required.
In other words, either the command message contains data for the ICC or the command request data from the Iao which is then included in the response. Is it procedure byte? The activation of the contacts by the interface device shall consist of the consecutive operations:.
Programming voltage at VPP Voh: Check character Figure 4: After transmission of such 5 byte header, the interface device waits for a procedure byte.