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ST7GEME4M1 Scheda tecnica(PDF) 11 Page - STMicroelectronics |
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ST7GEME4M1 Scheda tecnica(HTML) 11 Page - STMicroelectronics |
11 / 28 page ST7GEME4 ST7GEME4 implementation 11/28 3.3 EMV versus PC/SC-ISO mode The ST7GEME4 supports two operating modes: ● An EMV mode, based on the EMV4.1 specifications ● A PC/SC-ISO mode which allows to manage of a smartcard according to the PC/SC and ISO 7816-3 standards The default mode is PC/SC, however, the reader can switch between EMV and PC/SC-ISO modes. GemCore2000 is a utility in charge of managing the switching between the two modes. When the utility is activated, the reader attempts EMV mode management whenever a smartcard is inserted. If reading is successful, PC/SC mode will not be available. Caution: The activation of the GemCore2000 utility must be done before any card command. Any activation of the GemCore2000 utility is not recommended unless the reader is reset. The EMV mode fails if: ● The smartcard has not sent an EMV-compliant answer to reset (ATR) ● Negotiation of the buffer size with a T=1 card has failed Using PC/SC-ISO mode with GemCore2000 The reader switches to PC/SC mode after the application or the driver has sent the appropriate dedicated command to the reader (with a proprietary Escape command). In this case, the reader remains in PC/SC mode as long as the card remains in the reader. Whenever the EMV mode fails, the smartcard is powered off. After the host application has sent the PC/SC switch (proprietary) Escape command, the application must send a new Card Power On command. When the reader deals with an EMV card, the data exchanged between the reader and the host consists of short APDU messages. When the card is not EMV-compliant and the reader is set to PC/SC-ISO mode, the reader exchanges TPDU messages with the host. Restriction: character level and the extended APDU are not implemented in ST7GEME4 solution. Table 3. Technical features Features Description Characteristics Supported smartcards Asynchronous – Microprocessor cards – T=0, T=1 protocols – Transmission rate: 2 Kbps to 344 Kbps Synchronous – Through a comprehensive API Smartcard electrical interface Smartcard power supply – 5V/55mA and 3V/50mA and 1.8V/20mA – Short circuit current limitation – Power up/power down control sequences Smartcard management – Card insertion/extraction detection ESD protection on card I/O – 4 kV Human Body Model |
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