Specifications
ADT60/AET60 Reference Manual version 1.5 November 2005
4.2.2 Programming Voltage VPP (C6)
According to ISO 7816-3, the smart card contact C6 (VPP) supplies the programming voltage to the smart
card. Since all common smart cards in the market are EEPROM based and do not require the provision of
an external programming voltage, the contact C6 (VPP) has been implemented as a normal control signal in
the BioCARDKey/BioSIMKey. The electrical specifications of this contact are identical to those of the signal
RST (at contact C2).
4.2.3 Card Type Selection
The controlling PC has to always select the card type through the proper command sent to the
BioCARDKey/BioSIMKey prior to activating the inserted card.
For MCU-based cards the reader allows the user to select the preferred protocol, T=0 or T=1. However, this
selection is only accepted and carried out by the reader through the PPS when the card inserted in the
reader supports both protocol types. Whenever an MCU-based card supports only one protocol type, T=0 or
T=1, the reader automatically uses that protocol type, regardless of the protocol type selected by the
application.
4.2.4 Interface for Microcontroller-based Cards
For microcontroller-based smart cards only the contacts C1 (VCC), C2 (RST), C3 (CLK), C5 (GND) and C7
(I/O) are used. A frequency of 4 MHz is applied to the CLK signal (C3).
4.2.5 Card Tearing Protection
The BioCARDKey/BioSIMKey provides a mechanism to protect the inserted card when it is suddenly
withdrawn while it is powered up. The power supply to the card and the signal lines between the
BioCARDKey/BioSIMKey and the card are immediately deactivated while the card is being removed. As a
general rule, however, to avoid any electrical damage, a card should only be removed from the reader
while it is powered down.
NOTE - The BioCARDKey/BioSIMKey never does by itself switch on the power supply to the inserted card. This action must be
explicitly done by the controlling computer through the proper command sent to the reader.
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