H8SX1544 Datasheet, PDF (526/974 Pages) Renesas Technology Corp – Renesas 32-Bit CISC Microcomputer H8SX Family/H8SX/1500 Series

Section 12 Serial Communication Interface (SCI)
12.7 Operation in Smart Card Interface Mode
The SCI supports the IC card (smart card) interface, conforming to ISO/IEC 7816-3 (Identification
Card) standard, as an extended serial communication interface function. Smart card interface
mode can be selected using the appropriate register.
12.7.1 Sample Connection
Figure 12.21 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 V_CC using a resistor. Setting the RE
and TE bits 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.
VCC
TxD
RxD
SCK
Rx (port)
This LSI
Main unit of the device
to be connected
Data line
Clock line
Reset line
I/O
CLK
RST
IC card
Figure 12.21 Pin Connection for Smart Card Interface
Rev.2.00 Oct. 16, 2007 Page 472 of 916
REJ09B0381-0200