SH7706 Datasheet, PDF(411/749 Page) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH™ RISC engine Family/SH7700 Series

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SH7706 Datasheet, PDF (411/749 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH™ RISC engine Family/SH7700 Series

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Section 14 Serial Communication Interface (SCI)

Section 14 Serial Communication Interface (SCI)

This LSI has an on-chip serial communication interface (SCI) that supports both asynchronous and

clock synchronous serial communication. It also has a multiprocessor communication function for

serial communication among two or more processors. A block diagram of SCI is shown in figure

14.1, and the I/O ports are shown in figures 14.2 to 14.4.

14.1 Feature

The SCI has the following features.

â¢ Selectable from asynchronous or clock synchronous as the serial communications mode

Asynchronous mode:

ï£§ Serial data communications are synched by start-stop in character units. The SCI can

communicate with a universal asynchronous receiver/transmitter (UART), an asynchronous

communication interface adapter (ACIA), or any other communications chip that employs

a standard asynchronous serial system. It can also communicate with two or more other

processors using the multiprocessor communication function. There are 12 selectable serial

data communication formats.

ï£§ Data length: Seven or eight bits

ï£§ Stop bit length: One or two bits

ï£§ Parity: Even, odd, or none

ï£§ Multiprocessor bit: 1 or 0

ï£§ Receive error detection: Parity, overrun, and framing errors

ï£§ Break detection: By reading the RxD0 pin level directly from the port Serial

communication port data register (SCPDR) when a framing error occurs

Clock synchronous mode:

ï£§ Serial data communication is synchronized with a clock signal. The SCI can communicate

with other chips having a clock synchronous communication function. One serial data

communication format is available.

ï£§ Data length: Eight bits

ï£§ Receive error detection: Overrun errors

â¢ 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.

Rev. 5.00 May 29, 2006 page 363 of 698

REJ09B0146-0500

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