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ST7LCRE4U1 Fiches technique(PDF) 10 Page - STMicroelectronics

No de pièce ST7LCRE4U1
Description  Full-speed USB MCU with smartcard interface
Download  29 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST7LCRE4U1 Fiches technique(HTML) 10 Page - STMicroelectronics

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ST7LCR
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3
ST7LCR implementation
ST7LCRE4U1 and ST7LCRDIE6 offer single IC solutions and simplifies the integration of
smartcard interfaces into smartcard readers.
3.1
Functionality
A dedicated analog block provides the power supplies 1.8 V and 3 V necessary to interface
with different smartcard voltages available on the market. Voltages are selected by software.
A dedicated UART interface provides an IS07816 communication port for connection with
the smartcard connector. A full-speed USB interface port allows external connection to a
host computer.
3.2
Smartcard interface features
The ST7LCRE4U1 and ST7LCRDIE6 include the following features:
Compatibility with asynchronous cards
Compatibility with T=0 and T=1 protocols
Compatibility with EMV and PC/SC modes.
Compliance with ISO 7816-3 and 4 and ability to supply the cards with 1.8 V or 3 V
(class A, B or C cards, respectively)
Resume/wake-up mode upon smartcard insertion/removal
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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