Section 17 Smart Card Interface; Overview; Features - Hitachi SH7750 Hardware Manual

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The subset of the IC card (smart card) interface conforming to ISO/IEC7816-3 (Identification

Card) is supported as a serial communication interface (SCI) extension function.

Switching between the normal serial communication interface and the smart card interface is

carried out by means of a register setting.

Features of the smart card interface are listed below.

• Asynchronous mode

 Data length: 8 bits

 Parity bit generation and checking

 Transmission of error signal (parity error) in receive mode

 Error signal detection and automatic data retransmission in transmit mode

 Direct convention and inverse convention both supported

• On-chip baud rate generator allows any bit rate to be selected

• Three interrupt sources

There are three interrupt sources—transmit-data-empty, receive-data-full, and transmit/receive

error—that can issue requests independently.

The transmit-data-empty interrupt and receive-data-full interrupt can activate the DMA

controller (DMAC) to execute data transfer.

Section 17 Smart Card Interface

Rev. 6.0, 07/02, page 703 of 986

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