HD6417034 Datasheet, PDF (385/691 Pages) Renesas Technology Corp – SuperH RISC ENGINE SH7032 AND SH7034

Section 13 Serial Communication Interface (SCI)
13.1 Overview
The SuperH microcomputer has a serial communication interface (SCI) with two independent
channels. Both channels are functionally identical. The SCI supports both asynchronous and
synchronous serial communication. It also has a multiprocessor communication function for serial
communication between two or more processors.
13.1.1 Features
SCI features are listed below:
• Asynchronous mode
 Serial data communication is synchronized using a start-stop method 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
• 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
• Internal or external transmit/receive clock source: baud rate generator (internal) or SCK pin
(external)
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