HD6432345 Datasheet, PDF (425/907 Pages) Hitachi Semiconductor – H8S/2345 F-ZTAT Hardware Manual

Section 12 Serial Communication Interface (SCI)
12.1 Overview
The H8S/2345 Series is equipped with a 2-channel serial communication interface (SCI). Both
channels have the same functions. The SCI can handle both asynchronous and clocked
synchronous serial communication. A function is also provided for serial communication between
processors (multiprocessor communication function).
12.1.1 Features
SCI features are listed below.
• Choice of asynchronous or clocked synchronous serial communication mode
Asynchronous mode
 Serial data communication executed using 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
Clocked Synchronous mode
 Serial data communication synchronized with a clock
Serial data communication can be carried out with other chips that have a synchronous
communication function
 One serial data transfer format
Data length
: 8 bits
 Receive error detection : Overrun errors detected
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