Datasheet

Section 10 Serial Communication Interface

Rev. 6.00 Aug 04, 2006 page 347 of 680

REJ09B0145-0600

10.3 SCI3

10.3.1 Overview

In addition to SCI1, this LSI has two serial communication interfaces, SCI3-1 and SCI3-2, with

identical functions. In this manual, the generic term SCI3 is used to refer to both of these SCIs.

Serial communication interface 3 (SCI3) can carry out serial data communication in either

asynchronous or synchronous mode. It is also provided with a multiprocessor communication

function that enables serial data to be transferred among processors.

1. Features

Features of SCI3 are listed below.

• Choice of asynchronous or synchronous mode for serial data communication

 Asynchronous mode

Serial data communication is performed asynchronously, with synchronization provided

character by character. In this mode, serial data can be exchanged with standard

asynchronous communication LSIs such as a Universal Asynchronous

Receiver/Transmitter (UART) or Asynchronous Communication Interface Adapter

(ACIA). A multiprocessor communication function is also provided, enabling serial data

communication among processors.

There is a choice of 16 data transfer formats.

Data length 7, 8, 5 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 detected by reading the RXD

pin level directly when a framing

error occurs