HD6413007F20 Datasheet, PDF (526/798 Pages) Renesas Technology Corp – Hardware Manual Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series

14. Smart Card Interface
When the smart card uses the clock generated on the smart card interface, the SCK pin output is
input to the CLK pin of the smart card. If the smart card uses an internal clock, this connection is
unnecessary.
The reset signal should be output from one of this LSI's generic ports.
In addition to these pin connections, power and ground connections will normally also be
necessary.
V_CC
TxD
RxD
SCK
This chip ^{Px (port)}
Card-processing device
Data line
Clock line
Reset line
I/O
CLK
RST
Smart card
Figure 14.2 Smart Card Interface Connection Diagram
Note: If a smart card is not connected, and both TE and RE are set to 1, closed transmission/
reception is possible, enabling self-diagnosis to be carried out.
14.3.3 Data Format
Figure 14.3 shows the smart card interface data format. In reception in this mode, a parity check is
carried out on each frame, and if an error is detected an error signal is sent back to the transmitting
device to request retransmission of the data. In transmission, the error signal is sampled and the
same data is retransmitted if the error signal is low.
Rev.5.00 Sep. 12, 2007 Page 496 of 764
REJ09B0396-0500