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Section 14 Serial Communication Interface (SCI)
14.7
Smart Card Interface Description
The SCI supports the IC card (smart card) interface based on the ISO/IEC 7816-3 (Identification
Card) standard as an enhanced serial communication interface function. Smart card interface mode
can be selected using the appropriate register.
14.7.1
Sample Connection
Figure 14.21 shows a sample connection between the smart card and this LSI. As in the figure,
since this LSI communicates with the IC card using a single transmission line, interconnect the
TxD and RxD pins and pull up the data transmission line to VCC using a resistor. Setting the RE
and TE bits in SCR to 1 with the IC card not connected enables closed transmission/reception
allowing self diagnosis. To supply the IC card with the clock pulses generated by the SCI, input
the SCK pin output to the CLK pin of the IC card. A reset signal can be supplied via the output
port of this LSI.
Figure 14.21 Pin Connection for Smart Card Interface
Rev. 1.00 May 09, 2008 Page 408 of 954
REJ09B0462-0100
TxD
RxD
SCK
Rx (port)
This LSI
Main unit of the device
to be connected
VCC
I/O
Data line
CLK
Clock line
RST
Reset line
IC card
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