H8SXSLASH1663 datasheet(774/1158 Pages) RENESAS

774 / 1158 page

Section 15 Serial Communication Interface (SCI, IrDA, CRC)

Rev.1.00 Jun. 07, 2006 Page 722 of 1102

REJ09B0294-0100

15.7

Operation in Smart Card Interface Mode

The SCI supports the smart card interface, supporting the 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.

15.7.1

Sample Connection

Figure 15.24 shows a sample connection between the smart card and this LSI. As in the figure,

since this LSI communicates with the smart 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 smart card not connected enables closed transmission/reception allowing

self diagnosis. To supply the smart card with the clock pulses generated by the SCI, input the SCK

pin output to the CLK pin of the smart card. A reset signal can be supplied via the output port of

this LSI. (In SCI_5 and SCI-6, the clock generated in SCI cannot be provided to smart cards.)

TxD

RxD

This LSI

VCC

I/O

Main unit of the device

to be connected

Smart card

Data line

CLK

RST

SCK

Rx (port)

Clock line

Reset line

Figure 15.24 Pin Connection for Smart Card Interface

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