Operation In Smart Card Interface Mode; Sample Connection - Renesas RZ/A Series User Manual

RZ/A1L Group, RZ/A1LU Group, RZ/A1LC Group
15.6

Operation in Smart Card Interface Mode

The SCI supports the smart card (IC card) interface conforming to the ISO/IEC 7816-3 (Identification Card) standard.
Smart card interface mode can be selected using the appropriate register.
15.6.1

Sample Connection

Figure 15.25 shows a sample connection between a smart card (IC card) and this LSI.
As in the figure, since this LSI communicates with an IC card using a single transmission line, interconnect the TXDn
and RXDn pins and pull up the data transmission line to Vcc using a resistor.
Setting the TE and RE bits in SCR to 1 with an IC card disconnected enables closed transmission/reception allowing
self-diagnosis.
To supply an IC card with the clock pulses generated by the SCI, input the SCKn pin output to the CLK pin of an IC card.
The output port of this LSI can be used to output a reset signal.
Figure 15.25 Sample Connection with a Smart Card (IC Card)
R01UH0437EJ0600 Rev.6.00
Jan 29, 2021
TXDn
RXDn
SCKn
Port
This LSI
Main unit of the device to
be connected
15. Serial Communications Interface
VCC
I/O
Data line
CLK
Clock line
RST
Reset line
IC card
15-47