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2.5.2 Communication Functions
Reading and writing data with a smart card is performed by the way of contactless communication
between the integrated NFC module in the terminal and that smart card. Smart card is
preprogrammed by the manufacturer to perform certain operations in response to prescribed
commands. When a command is correctly transmitted by the terminal via the NFC to smart card,
the smart card responds to the received command by performing a corresponding operation. Once
the operation is complete, the smart card then transmits response indicating the result of the
operation.
An explanation of the functions relating to this communication process is provided below.
Card Polling Function
This function carries out the following performances.
•
Searches smart cards within the communication range
•
Detects smart card
•
Activates smart card
•
Retrieves smart card response information
The card polling function terminates searching smart cards either when it detects a smart card, the
preset timeout elapses, the assigned callback function returns 'FALSE', or the 'stop polling'
function is carried out.
Once the smart card has been successfully activated, the NFC module continually transmits radio
waves in order to supply power to the smart card. This radio wave transmission terminates
automatically when the 'radio off' function is carried out or when a certain preset time elapses
without any communication between the NFC module and the smart card. It is possible to enable
or disable the automatic stop (auto stop) setting and to change the time until the auto stop occurs
(i.e. the timeout). Under the default settings, the auto stop is set effect and the timeout is set to
1,000 milliseconds.
Note:
If multiple smart cards lie in the proximity of the communication range, it is not possible to
activate only a specific card or all the cards at a time. Therefore, in order to carry out secured
communication between each smart card and the terminal, have smart card one by one to the
proximity.
Summary of Contents for IT-800 Series
Page 173: ...173 Copyrights Tab This tab is for displaying the OS copyright information Figure 3 19 ...
Page 201: ...201 Date Tab This tab is for setting display format of date Figure 3 56 ...
Page 247: ...247 4 2 Games The terminal comes with two games Solitaire and Bubble Breaker Figure 4 2 ...
Page 255: ...255 4 5 Calculator The application can be used to operate nine digit calculator Figure 4 11 ...