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Section 16 Serial Communication Interface (SCI, IrDA)
16.1
Overview
The H8S/2633 is equipped with 5 independent serial communication interface (SCI) channels. The
SCI can handle both asynchronous and clocked synchronous serial communication. A function is
also provided for serial communication between processors (multiprocessor communication
function).
One of the five SCI channels is capable of sending and receiving IrDA communications
waveforms (based on IrDA Version 1.0).
16.1.1
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
Stop bit length
Parity
Multiprocessor bit
Receive error detection : Parity, overrun, and framing errors
Break detection
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
: 7 or 8 bits
: 1 or 2 bits
: Even, odd, or none
: 1 or 0
: Break can be detected by reading the RxD pin level directly in
case of a framing error
: 8 bits
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