Section 10 Serial Communication Interface; Overview; Features - Hitachi HD6473867 Hardware Manual

Section 10 Serial Communication Interface

10.1 Overview

The H8/3864 Series is provided with two serial communication interfaces, SCI3-1 and SCI3-2.
These two SCIs have identical functions. In this manual, the generic term SCI3 is used to refer to
both 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.

10.1.1 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
Stop bit length
Parity
Multiprocessor bit
Receive error detection
Break detection
7, 8, 5 bits
1 or 2 bits
Even, odd, or none
"1" or "0"
Parity, overrun, and framing errors
Break detected by reading the RXD
framing error occurs
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