HD6432138SW datasheet(441/1061 Pages) RENESAS

441 / 1061 page

Section 15 Serial Communication Interface (SCI, IrDA)

Rev. 4.00 Jun 06, 2006 page 387 of 1004

REJ09B0301-0400

Section 15 Serial Communication Interface (SCI, IrDA)

15.1

Overview

The H8S/2138 Group and H8S/2134 Group are equipped with a 3-channel serial communication

interface (SCI). The SCI can handle both asynchronous and clocked synchronous serial

communication. A function is also provided for serial communication between processors

(multiprocessor communication function).

One of the three SCI channels can transmit and receive IrDA communication waveforms based on

IrDA specification version 1.0.

15.1.1

Features

SCI features are listed below.

• Choice of asynchronous or synchronous serial communication mode

Asynchronous mode

 Serial data communication is executed using an asynchronous system in which

synchronization is achieved character by character

Serial data communication can be carried out with standard asynchronous communication

chips such as a Universal Asynchronous Receiver/Transmitter (UART) or Asynchronous

Communication Interface Adapter (ACIA)

 A multiprocessor communication function is provided that enables serial data

communication with a number of processors

 Choice of 12 serial data transfer formats

Data length:

7 or 8 bits

Stop bit length:

1 or 2 bits

Parity:

Even, odd, or none

Multiprocessor bit: 1 or 0

 Receive error detection: Parity, overrun, and framing errors

 Break detection: Break can be detected by reading the RxD pin level directly in case of a

framing error

Synchronous mode

 Serial data communication is synchronized with a clock

Serial data communication can be carried out with other chips that have a synchronous

communication function

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