H8S2245 datasheet(525/818 Pages) RENESAS

No. de pieza	H8S2245

Descripción Electrónicos	Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series

PDF	818 Pages

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Fabricante Electrónico	RENESAS [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.

H8S2245 Datasheet(PDF) 525 Page - Renesas Technology Corp