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SH7137 Datasheet(PDF) 2 Page - Renesas Technology Corp |
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SH7137 Datasheet(HTML) 2 Page - Renesas Technology Corp |
2 / 22 page 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 |
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