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H8S2245 데이터시트(PDF) 525 Page - Renesas Technology Corp |
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H8S2245 데이터시트(HTML) 525 Page - Renesas Technology Corp |
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525 / 818 page ![]() Section 13 Smart Card Interface Rev.3.00 Mar. 26, 2007 Page 483 of 772 REJ09B0355-0300 13.3.2 Pin Connections Figure 13.2 shows a schematic diagram of Smart Card interface related pin connections. In communication with an IC card, since both transmission and reception are carried out on a single data transmission line, the TxD pin and RxD pin should be connected with the LSI pin. The data transmission line should be pulled up to the V CC power supply with a resistor. When the clock generated on the Smart Card interface is used by an IC card, the SCK pin output is input to the CLK pin of the IC card. No connection is needed if the IC card uses an internal clock. LSI port output is used as the reset signal. Other pins must normally be connected to the power supply or ground. TxD RxD SCK Rx (port) H8S/2245 I/O CLK RST VCC Connected equipment IC card Data line Clock line Reset line Figure 13.2 Schematic Diagram of Smart Card Interface Pin Connections Note: If an IC card is not connected, and the TE and RE bits are both set to 1, closed transmission/reception is possible, enabling self-diagnosis to be carried out. |
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