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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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SH7708 数据表(PDF) 423 Page - Renesas Technology Corp |
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SH7708 数据表(HTML) 423 Page - Renesas Technology Corp |
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423 / 633 page  405 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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