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SH7708 Fiches technique(PDF) 423 Page - Renesas Technology Corp

No de pièce SH7708
Description  SuperH??RISC engine
PDF  633 Pages
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Fabricant  RENESAS [Renesas Technology Corp]
Site Internet  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

SH7708 Fiches technique(HTML) 423 Page - Renesas Technology Corp

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14.3.2
Pin Connections
Figure 14.2 shows the pin connection diagram for the smart card interface. During communication
with an IC card, transmission and reception are both carried out over the same data transfer line,
so connect the TxD and RxD pins on the chip. Pull up the data transfer line to the power supply
VCC side with a resistor.
When using the clock generated by the smart card interface on an IC card, input the SCK pin
output to the IC card’s CLK pin. This connection is not necessary when the internal clock is used
on the IC card.
Use the chip’s port output as the reset signal. Apart from these pins, the power and ground pin
connections are usually also required.
Note:
When the IC card is not connected and both RE and TE are set to 1, closed communication
is possible and auto-diagnosis can be performed.
LSI
TxD
IO
CLK
RST
RxD
SCK
Px (port)
Clock line
Data line
Reset line
IC card
Connected device
VCC
Figure 14.2 Pin Connection Diagram for the Smart Card Interface



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