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communicate with two smart cards at the same time as there is only one protocol control
block for all cards.
The figure below shows an overview of the connections when PN7462 family is used to
control several smart cards.
The external TDA is required to handle the smart card electrical interface. The
connection between the PN7462 family and the TDA is composed of 2 parts:
The figure below summarizes this connection.
UM10858
User manual
COMPANY PUBLIC
Fig 38. Contact interface architecture
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The host interface control, where the PN7462 family is the master, controlling the
TDA behavior: card activation, deactivation, TDA configuration (voltage level,
clock division, slew rates...)
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The ISO7816 link: the PN7462 family handles the ISO7816 communication
protocol and uses the TDA as a level shifter for the clock and I/O signals.
All information provided in this document is subject to legal disclaimers.
Rev. 1.4 — 14 May 2018
314514
UM10858
PN7462 family HW user manual
© NXP B.V. 2018. All rights reserved.
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