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Section 13 Serial Communication Interface (SCI)
13.1
Overview
The H8S/2646 Series is equipped with 2 or 3 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).
Note: * Two channels in the H8S/2646, H8S/2646R, and H8S/2645; three channels in the
H8S/2648, H8S/2648R, and H8S/2647.
13.1.1
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
Содержание H8S/2645
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