Notice
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(2012.4)
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Sep 24, 2013
Page iii of liv
General Precautions on Handling of Product
1. Treatment of NC Pins
Note: Do not connect anything to the NC pins.
The NC (not connected) pins are either not connected to any of the internal circuitry or are
they are used as test pins or to reduce noise. If something is connected to the NC pins, the
operation of the LSI is not guaranteed.
2. Treatment of Unused Input Pins
Note: Fix all unused input pins to high or low level.
Generally, the input pins of CMOS products are high-impedance input pins. If unused pins
are in their open states, intermediate levels are induced by noise in the vicinity, a pass-
through current flows internally, and a malfunction may occur.
3. Processing before Initialization
Note: When power is first supplied, the product’s state is undefined.
The states of internal circuits are undefined until full power is supplied throughout the
chip and a low level is input on the reset pin. During the period where the states are
undefined, the register settings and the output state of each pin are also undefined. Design
your system so that it does not malfunction because of processing while it is in this
undefined state. For those products which have a reset function, reset the LSI immediately
after the power supply has been turned on.
4. Prohibition of Access to Undefined or Reserved Addresses
Note: Access to undefined or reserved addresses is prohibited.
The undefined or reserved addresses may be used to expand functions, or test registers
may have been be allocated to these addresses. Do not access these registers; the system’s
operation is not guaranteed if they are accessed.
5. Reading from/Writing to Reserved Bit of Each Register
Note: Treat the reserved bit of register used in each module as follows except in cases where the
specifications for values which are read from or written to the bit are provided in the
description.
The bit is always read as 0. The write value should be 0 or one, which has been read
immediately before writing.
Writing the value, which has been read immediately before writing has the advantage of
preventing the bit from being affected on its extended function when the function is
assigned.
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R01UH0457EJ0401 Rev. 4.01
Sep 24, 2013
Preface
The SH-4 (SH7751 Group (SH7751, SH7751R)) microprocessor incorporates the 32-bit SH-4
CPU and is also equipped with peripheral functions necessary for configuring a user system.
The SH7751 Group is built in with a variety of peripheral functions such as cache memory,
memory management unit (MMU), interrupt controller, floating-point unit (FPU), timers, two
serial communication interfaces (SCI, SCIF), real-time clock (RTC), user break controller (UBC),
bus state controller (BSC) and PCI controller (PCIC). This series can be used in a wide range of
multimedia equipment. The bus controller is compatible with ROM, SRAM, DRAM, synchronous
DRAM and PCMCIA.
Target Readers:
This manual is designed for use by people who design application systems using
the SH7751 or SH7751R.
To use this manual, basic knowledge of electric circuits, logic circuits and microcomputers is
required.
This hardware manual contains revisions related to the addition of R-mask functionality. Be sure
to check the text for the updated content.
Purpose:
This manual provides the information of the hardware functions and electrical
characteristics of the SH7751 and SH7751R.
The SH-4 Software Manual contains detailed information of executable instructions. Please read
the Software Manual together with this manual.
How to Use the Book:
•
To understand general functions
→
Read the manual from the beginning.
The manual explains the CPU, system control functions, peripheral functions and electrical
characteristics in that order.
•
To understanding CPU functions
→
Refer to the separate SH-4 Software Manual.
Explanatory Note:
Bit sequence: upper bit at left, and lower bit at right
List of Related Documents:
The latest documents are available on our Web site. Please make
sure that you have the latest version.
(http://www.renesas.com/)
R01UH0457EJ0401 Rev. 4.01
Sep 24, 2013
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