H8SLASH3003 datasheet(441/715 Pages) RENESAS

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Section 13 Serial Communication Interface

13.1 Overview

The H8/3003 has a serial communication interface (SCI) with two independent channels. Both

channels are functionally identical. The SCI can communicate in asynchronous mode or

synchronous mode, and has a multiprocessor communication function for serial communication

among two or more processors.

13.1.1 Features

SCI features are listed below.

•

Selection of asynchronous or synchronous mode for serial communication

Asynchronous mode

Serial data communication is synchronized one character at a time. The SCI can communicate

with a universal asynchronous receiver/transmitter (UART), asynchronous communication

interface adapter (ACIA), or other chip that employs standard asynchronous serial

communication. It can also communicate with two or more other processors using the

multiprocessor communication function. There are twelve selectable serial data

communication formats.

— Data length:

7 or 8 bits

— Stop bit length:

1 or 2 bits

— Parity bit:

even, odd, or none

— Multiprocessor bit:

1 or 0

— Receive error detection: parity, overrun, and framing errors

— Break detection:

by reading the RxD level directly when a framing error occurs

Synchronous mode

Serial data communication is synchronized with a clock signal. The SCI can communicate

with other chips having a synchronous communication function. There is one serial data

communication format.

— Data length:

8 bits

— Receive error detection: overrun errors

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