HD6417706 RENESAS [Renesas Technology Corp], HD6417706 Datasheet - Page 447

• Manufacturer Part Number: HD6417706
• Description: Renesas 32-Bit RISC Microcomputer Super RISC engine Family/SH7700 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

As an added serial communications interface function, the SCI supports an IC card (smart card)
interface that conforms to the data transfer protocol (asynchronous half-duplex character
transmission protocol) of the ISO/IEC standard 7816-3 for identification of cards. Register settings
are used to switch between the ordinary serial communication interface and the smart card
interface. Figure 15.1 is the block diagram of the smart card interface.
15.1
The smart card interface has the following features:
Asynchronous mode
Bit rate can be selected using on-chip baud rate generator.
Three types of interrupts: Transmit-data-empty, receive-data-full, and communication-error
interrupts are requested independently.
Data length: Eight bits
Parity bit generation and check
Receive mode error signal detection (parity error)
Transmit mode error signal detection and automatic re-transmission of data
Supports both direct convention and inverse convention
Feature
SCK0
RxD0
TxD0
Legend
SCSCMR:
SCRSR:
SCRDR:
SCTSR:
SCTDR:
Figure 15.1 Smart Card Interface Block Diagram
Section 15 Smart Card Interface
SCRDR
SCRSR
Smart card mode register
Receive shift register
Receive data register
Transmit shift register
Transmit data register
Parity generation
SCTDR
SCTSR
Parity check
Module data bus
Transmit/
receive
SCSCMR
control
SCSMR
SCSSR
SCSCR
SCSMR:
SCSCR:
SCSSR:
SCBRR:
External clock
Clock
Baud rate
generator
SCI
SCBRR
Serial mode register
Serial control register
Serial status register
Bit rate register
Rev. 4.00, 03/04, page 401 of 660
Internal
data bus
P
P /4
P /16
P /64
TXI
RXI
ERI