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Section 12 Serial Communication Interface (SCI)
12.1
Overview
The H8S/2214 is equipped with mutually 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).
SCI0 allows a choice of 720 kbps, 460.784 kbps, or 115.192 kbps at 16 MHz operation.
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
Average transfer rate generator (SCI0): 720 kbps, 460.784 kbps, or 115.192 kbps can be
selected at 16 MHz
A transfer rate clock can be input from the TPU (SCI0)
Clocked Synchronous mode
Serial data communication synchronized with a clock