Datasheet

Table Of Contents
Section 13 Serial Communication Interface
REJ09B0140-0900 Rev. 9.00 Page 381 of 846
Sep 16, 2010
H8S/2215 Group
Section 13 Serial Communication Interface
This LSI has three independent serial communication interface (SCI) channels. The SCI can
handle both asynchronous and clocked synchronous serial communication. Asynchronous serial
data communication can be carried out using standard asynchronous communication chips such as
a Universal Asynchronous Receiver/Transmitter (UART) or an Asynchronous Communication
Interface Adapter (ACIA). The SCI also supports the smart card (IC card) interface based on
ISO/IEC 7816-3 (Identification Card) as an enhanced asynchronous communication function.
13.1 Features
Choice of asynchronous or clocked synchronous serial communication mode
Full-duplex communication capability
The transmitter and receiver are mutually independent, enabling transmission and reception to
be executed simultaneously.
Double-buffering is used in both the transmitter and the receiver, enabling continuous
transmission and continuous reception of serial data.
On-chip baud rate generator allows any bit rate to be selected
External clock can be selected as a transfer clock source (except for in Smart Card interface
mode).
Choice of LSB-first or MSB-first transfer (except in the case of asynchronous mode 7-bit data)
Four interrupt sources
Transmit-end, transmit-data-empty, receive-data-full, and receive error — that can issue
requests.
The transmit-data-empty interrupt and receive data full interrupts can be used to activate the
DMA controller (DMAC) or the Data Transfer Controller (DTC).
Module stop mode can be set
Asynchronous Mode
Data length: 7 or 8 bits
Stop bit length: 1 or 2 bits
Parity: Even, odd, or none
Receive error detection: Parity, overrun, and framing errors
Break detection: Break can be detected by reading the RxD pin level directly in the case of a
framing error