SH7136/SH7137 Group

SCI Clock Synchronous Simultaneous Transmit and

Receive of Serial Data and DTC Data Transfer

REJ06B0890-0100/Rev.1.00

July 2009

Page 2 of 22

1. Introduction

1.1

Specifications

This application note describes simultaneous clock synchronous transmit and receive of serial data by the serial

communication interface (SCI), using the data transfer functions of the data transfer controller (DTC). Figure 1 shows

the configuration.

• SCI channel 0 and the DTC are used.

• The SCI communication format is 8-bit fixed.

• The DTC is used to transfer the SCI transmit and receive data. The DTC uses two channels, one for SCI transmit

and one for SCI receive.

• The DTC is activated for transmit operation by an SCI transmit data empty interrupt request. The DTC is activated

for receive operation by an SCI receive data full interrupt request.

• The SCI transmit and receive data count is 32 bytes.

Figure 1 Example of Clock Synchronous Serial Data Transmit/Receive Using DTC

1.2

Module Used

• Data transfer controller (DTC)

• Serial communication interface (SCI) channel 0

1.3

Applicable Conditions

MCU:

SH7137

Operating frequencies: Internal clock (I

φ) = 80 MHz

Bus clock (B

φ) = 40 MHz

Peripheral clock (P

φ) = 40 MHz

MTU2 clock (MP

φ) = 40 MHz

MTU2S clock (MI

φ) = 80 MHz

C compiler:

Renesas Technology High-performance Embedded Workshop, Ver. 4.05.01.001, Renesas

Technology SuperH RISC engine Family C/C++ Compiler Package, Ver. 9.03, Release 00

Compile options:

High-performance Embedded Workshop default settings