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Section 14 Serial Communication Interface (SCI)
Section 14 Serial Communication Interface (SCI)
14.1 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).
14.1.1 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
Rev.6.00 Sep. 27, 2007 Page 597 of 1268
REJ09B0220-0600