Datasheet

Section 12 Serial Communication Interface (SCI)
Rev.7.00 Feb. 14, 2007 page 431 of 1108
REJ09B0089-0700
Section 12 Serial Communication Interface (SCI)
12.1 Overview
The chip is equipped with a serial communication interface (SCI) that can handle both
asynchronous and 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 synchronous serial communication mode
Asynchronous mode
⎯ Serial data communication 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 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