HD6473887 Datasheet, PDF (283/523 Pages) Renesas Technology Corp – Hitachi Single-Chip Microcomputer

10.3 SCI3
10.3.1 Overview
In addition to SCI1, the H8/3887 Series has two serial communication interfaces, SCI3-1 and
SCI3-2, with identical functions. In this manual, the generic term SCI3 is used to refer to both of
these SCIs.
Serial communication interface 3 (SCI3) can carry out serial data communication in either
asynchronous or synchronous mode. It is also provided with a multiprocessor communication
function that enables serial data to be transferred among processors.
1. Features
Features of SCI3 are listed below.
• Choice of asynchronous or synchronous mode for serial data communication
 Asynchronous mode
Serial data communication is performed asynchronously, with synchronization provided
character by character. In this mode, serial data can be exchanged with standard
asynchronous communication LSIs such as a Universal Asynchronous
Receiver/Transmitter (UART) or Asynchronous Communication Interface Adapter
(ACIA). A multiprocessor communication function is also provided, enabling serial data
communication among processors.
There is a choice of 16 data transfer formats.
Data length
Stop bit length
Parity
Multiprocessor bit
Receive error detection
Break detection
7, 8, 5 bits
1 or 2 bits
Even, odd, or none
“1” or “0”
Parity, overrun, and framing errors
Break detected by reading the RXD_3X pin level directly when a framing
error occurs
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