SH7055S Datasheet, PDF (495/1002 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7000 Series

Section 15 Serial Communication Interface (SCI)
15.1 Overview
The SH7055SF has a serial communication interface (SCI) with five independent channels.
The SCI supports both asynchronous and synchronous serial communication. It also has a
multiprocessor communication function for serial communication between two or more
processors, and a clock inverted input/output function.
15.1.1 Features
The SCI has the following features:
• Selection of asynchronous or synchronous as the serial communication mode
 Asynchronous mode
Serial data communication is synchronized in character units. The SCI can communicate
with a universal asynchronous receiver/transmitter (UART), an asynchronous
communication interface adapter (ACIA), or any other chip that employs standard
asynchronous serial communication. It can also communicate with two or more other
processors using the multiprocessor communication function. There are twelve selectable
serial data communication formats.
• Data length: seven or eight bits
• Stop bit length: one or two bits
• Parity: even, odd, or none
• Multiprocessor bit: one or none
• Receive error detection: parity, overrun, and framing errors
• Break detection: by reading the RxD level directly when a framing error occurs
 Synchronous mode
Serial data communication is synchronized with a clock signal. The SCI can communicate
with other chips having a synchronous communication function. There is one serial data
communication format.
• Data length: eight bits
• Receive error detection: overrun errors
• Serial clock inverted input/output
• Full duplex communication: The transmitting and receiving sections are independent, so the
SCI can transmit and receive simultaneously. Both sections use double buffering, so
continuous data transfer is possible in both the transmit and receive directions.
• On-chip baud rate generator with selectable bit rates
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