H8S2245 datasheet(445/818 Pages) RENESAS

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Section 12 Serial Communication Interface (SCI)

Rev.3.00 Mar. 26, 2007 Page 403 of 772

REJ09B0355-0300

Section 12 Serial Communication Interface (SCI)

12.1

Overview

The H8S/2245 Group is equipped with a 3-channel serial communication interface (SCI). All three

channels have the same functions. The SCI can handle both asynchronous and clocked

synchronous serial communication. A function is also provided for serial communication between

processors (multiprocessor communication function).

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

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

 Receive error detection: Overrun errors detected

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