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ST7GEME4 Folha de dados(PDF) 10 Page - STMicroelectronics

Nome de Peças ST7GEME4
Descrição Electrónicos  Full-speed USB MCU with smartcard firmware and EMV/non-EMV interface
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST7GEME4 Folha de dados(HTML) 10 Page - STMicroelectronics

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ST7GEME4 implementation
ST7GEME4
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3
ST7GEME4 implementation
The ST7GEME4 has been developed to offer a complete ready-to-use firmware solution
which allows fast development and rapid time-to-market of smartcard reader applications.
It offers a single IC solution and simplifies the integration of smartcard interfaces into
electronic devices such as computers, POS terminals, mobile phones, PDAs, home routers,
and set-top boxes. Pre-programmed with communication software from our partner
GEMPLUS, the ST7GEME4 is a complete firmware solution controlling the communication
between ISO 7816 1-2-3-4 cards and a host system. An evaluation kit and reference design
with a complete bill of materials and PCB recommendations are available. The ST7GEME4
complies with EMVCo/EMV2000 standards. Software support and engineering expertise in
system integration and PCB design are available as additional services.
3.1
Functionality
The core functionality of ST7GEME4 resides in its pre-programmed software embedded in
ROM memory. GemCoreTM technology manages the communication protocol to/from the
host computer and the external card. Basic features and compliance are described in the
features section and in Table 3 on page 11.
A dedicated analog block provides smartcard power supplies 1.8 V, 3 V, and 5 V necessary
to interface with different card voltages available on the market. Voltages are selected by
software. External LEDs can also be directly connected to dedicated I/Os.
A dedicated UART interface provides an ISO 7816 communication port for connection with
the smartcard connector. A full-speed USB interface port allows external connection to a
host computer. An optional RS232 connection is also available on dedicated I/Os.
3.2
Smartcard interface features
The ST7GEME4 firmware includes the following features:
Compatibility with asynchronous cards
Compatibility with T=0 and T=1 protocols
Compatibility with EMV and PC/SC modes.
Compatibility with ISO 7816-3 and 4 and ability to supply the cards with 5V, 3V or 1.8V
(class A, B or C cards, respectively)
Resume/wake-up mode upon smartcard insertion/removal
Further details on smartcard management can be found in "Gemcore USB Pro reference
manual" from Gemplus.
The reader is able to communicate with smartcards up to the maximum baud rate allowed,
namely 344 086 bps (TA1=16) for a clock frequency of 4 MHz. Because the size of the
smartcard buffer is 261 bytes, care must be taken not to exceed this size during APDU
exchanges when the protocol in use is T=1.


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