Renesas Starter Kit for 7542 User`s Manual
Contents
1. 8 Programming Methods The board is intended for use with High performance Embedded Workshop and the supplied E8a debugger Refer to 7542 Group Hardware Manual for details of programming the microcontroller without using these tools 14 9 1 Microcontroller Headers Table 9 1 to Table 9 4 show the microcontroller pin headers and their corresponding microcontroller connections The header pins connect Chapter 9 Headers directly to the microcontroller pins Marked pins are subject to option links J1 Pin Circuit Net Name Device Pin Pin Circuit Net Name Device Pin 1 AD2 1 2 AD3 2 3 10 5 3 4 1106 4 5 CON VREF 5 6 RESn 6 7 CNVSS EBC 7 8 UC_VCC 8 Table 9 1 J 1 J2 Pin Circuit Net Name Device Pin Pin Circuit Net Name Device Pin 1 CON XIN 9 2 CON XOUT 10 3 GROUND 1 4 IO 12 5 101 13 6 10 2 14 7 10_3 IRQ1 15 8 IO 4 16 Table 9 2 J 2 J3 Pin Circuit Net Name Device Pin Pin Circuit Net Name Device Pin 1 IRQO 17 2 TRIGb 18 3 TMR1 19 4 10 7 20 5 TMRO 21 6 E8 TRX 22 7 E8 TTX 23 8 SCLK_E8D 24 Table 9 3 J 3 J4 Pin Circuit Net Name Device Pin Pin Circuit Net Name Device Pin 1 E8 BUSY 25 2 SClaRX 26 3 SClaTX 21 4 SClaCK 28 5 CTS RTS 29 6 TRIGa 30 7 ADO 31 8 AD1 32 Table 9 4 J 4 9 2 Application Headers Table 9 5 and Table 9 6 below sh2. MJ O CS CH RCI Ora Get Ci4 Th e 088 Ls R40 eo 2 2 lio l ken Figure 11 1 Component Placement Chapter 12 Additional Information For details on how to use High performance Embedded Workshop refer to the High performance Embedded Workshop manual available on the CD or from the web site For information about the 7542 group microcontrollers refer to the 7542 Group Hardware Manual For information about the 7542 assembly language refer to the 740 Family Software Manual Online technical support and information is available at http www renesas com renesas starter kits Technical Contact Details America techsupport rta renesas com Europe tools support eu renesas com Japan csc renesas com General information on Renesas Microcontrollers can be found on the Renesas website at http www renesas com 20 Renesas Starter Kit for 7542 User s Manual Publication Date Rev 2 00 Aug 10 2007 Published by Renesas Solutions Corp 4 1 6 Miyahara Yodogawa ku Osaka City 532 0003 Japan 2007 Renesas Solutions Corp Renesas Technology Europe Ltd and Renesas Technology Corp All Rights Reserved Renesas Starter Kit for 7542 User s Manual TLTENESAS Renesas Electronics Corporation 1753 Shimonumabe Nakahara ku Kawasaki shi Kanagawa 211 8668 Japan REJ10J1329 0200
3. hereby under any patents copyrights or other intellectual property rights of Renesas Electronics or others You should not alter modify copy or otherwise misappropriate any Renesas Electronics product whether in whole or in part Descriptions of circuits software and other related information in this document are provided only to illustrate the operation of semiconductor products and application examples You are fully responsible for the incorporation of these circuits software and information in the design of your equipment Renesas Electronics assumes no responsibility for any losses incurred by you or third parties arising from the use of these circuits software or information When exporting the products or technology described in this document you should comply with the applicable export control laws and regulations and follow the procedures required by such laws and regulations You should not use Renesas Electronics products or the technology described in this document for any purpose relating to military applications or use by the military including but not limited to the development of weapons of mass destruction Renesas Electronics products and technology may not be used for or incorporated into any products or systems whose manufacture use or sale is prohibited under any applicable domestic or foreign laws or regulations Renesas Electronics has used reasonable care in preparing the information included in this document but Re
4. 3 Table 6 5 Power Configuration Links Table 6 6 below describes the function of the option links associated with Clock configuration The default configuration is indicated by BOLD text Option Link Settings Reference Function Fitted Alternative Removed Related To R1 Main Clock Oscillator Parallel resister for X1 clock Not fitted R2 R3 R4 R5 C3 or Link resister for RC oscillation R2 Main Clock Oscillator Connects X1 clock to X1 clock disconnected from R1 R3 R6 R7 microcontroller microcontroller R3 Main Clock Oscillator Connects X1 clock to X1 clock disconnected from R1 R2 R6 R7 microcontroller microcontroller R4 Main Clock Oscillator Resistor for On chip oscillator Not fitted R1 R2 R3 R6 R7 operation R5 Main Clock Oscillator Resistor for RC oscillation Not fitted R1 R2 R3 R4 R6 R7 C3 R6 Main Clock Oscillator Connects External Disconnects sensitive R1 R2 R3 Microcontroller header pins to microcontroller signals from microcontroller external pins R7 Main Clock Oscillator Connects External Disconnects sensitive R1 R2 R3 Microcontroller header pins to microcontroller signals from microcontroller external pins Table 6 6 Clock Configuration Links Table 6 7 below describes the function of the option links associated with Serial configuration The default configuration is indicated by BOLD text Option Link Settings Re
5. R47 15 to IRQ1 R49 LCD Connects microcontroller pin Disconnected 16 to LCD E Table 6 9 Other Option L 11 inks 6 7 Oscillator Sources A crystal oscillator is fitted on the Renesas Starter Kit board and used to supply the main clock input to the Renesas microcontroller Table 6 10 details the oscillator that is fitted and alternative footprints provided on this Renesas Starter Kit Component Crystal X1 Fitted 8 MHz HC 49U package Table 6 10 Oscillator 6 8 Reset Circuit The CPU Board includes a simple latch circuit that links the mode selection and reset circuit This provides an easy method for swapping the device between Boot Mode and Single chip mode This circuit is not required on customers boards as it is intended for providing easy evaluation of the operating modes of the device on the Renesas Starter Kit Please refer to the hardware manual for more information on the requirements of the reset circuit The Reset circuit operates by latching the state of the boot switch on pressing the reset button This control is subsequently used to modify the CNVss pin states as required The CNVss pin should change state only while the reset signal is active to avoid possible device damage The reset is held in the active state for a fixed period by a pair of resistors and a capacitor Please check the reset requirements carefully to ensure the reset circuit on the customers board m
6. Renesas Starter Kit only supports 5V operation Table 6 4 shows the pin allocation and signal names used on this connector J8 Pin Circuit Net Name Device Pin Circuit Net Name Device Pin Pin 1 Ground 2 5V Only 3 No Connection 4 LCD_RS 20 5 R W Wired to Write only 6 LCD E 16 7 No Connection 8 No Connection 9 No Connection 10 No Connection 11 LCD_D4 1 12 LCD D5 2 13 LCD D6 3 14 LCD D7 4 Table 6 4 LCD Module Connections 6 6 Option Links Table 6 5 below describes the function of the option links associated with Power configuration The default configuration is indicated by BOLD text Option Link Settings Reference Function Fitted Alternative Removed Related To R16 Board VCC Supply to board from DC Disconnected R20 Power J ack J 5 R17 Microcontroller Supply to microcontroller Fit Low ohm resister to R18 R19 R20 VCC measure current R18 Board VCC Connects External 5V External 5V disconnected from R17 R19 R20 R21 CON_5V to Board_VCC Board VCC R19 Board VCC Connects External 3V3 External 3V3 disconnected R17 R18 R20 R21 CON_3V3 to Board VCC from Board_VCC R20 Board VCC Connects Board VCC supply Board VCC disconnected from R16 R17 R18 to board voltage line board voltage line R19 R21 R22 User I O Power Connects Board VCC supply Board VCC disconnected from Supply to SW2 3 and LEDO 3 SW2 3 and LEDO
7. To our customers Old Company Name in Catalogs and Other Documents On April 1 2010 NEC Electronics Corporation merged with Renesas Technology Corporation and Renesas Electronics Corporation took over all the business of both companies Therefore although the old company name remains in this document it is a valid Renesas Electronics document We appreciate your understanding Renesas Electronics website http www renesas com April 1 2010 Renesas Electronics Corporation Issued by Renesas Electronics Corporation http www renesas com Send any inquiries to http www renesas com inquiry ENESAS 8 10 11 12 Notice All information included in this document is current as of the date this document is issued Such information however is subject to change without any prior notice Before purchasing or using any Renesas Electronics products listed herein please confirm the latest product information with a Renesas Electronics sales office Also please pay regular and careful attention to additional and different information to be disclosed by Renesas Electronics such as that disclosed through our website Renesas Electronics does not assume any liability for infringement of patents copyrights or other intellectual property rights of third parties by or arising from the use of Renesas Electronics products or technical information described in this document No license express implied or otherwise is granted
8. Tristate Control NC 25 SPARE CON XOUT 10 26 SPARE NC Table 9 6 J A2 Standard Generic Header 16 Chapter 10 Code Development 10 1 Overview Note For all code debugging using Renesas software tools the Renesas Starter Kit board must be connected to a Personal Computer USB port via an E8a An E8a is supplied with the Renesas Starter Kit product 10 2 Mode Support High performance Embedded Workshop connects to the Microcontroller and programs it via the E8a Mode support is handled transparently to the user 10 3 Breakpoint Support High performance Embedded Workshop supports breakpoints on the user code both in RAM and ROM Double clicking in the breakpoint column in the code sets the breakpoint Breakpoints will remain unless they are double clicked to remove them 17 10 4 Memory Map 00000h 00040h 00040h 00440h User RAM Area 003F0h Emulator Firmware OOFEOh ee 0043Fh OOFFFh 07000h 07000h 08000h 08080h 08000h OFFDCh OFFDEh User Internal ROM 08580h Interrupt Vector OFFF6h Serial 1 02 receive OFFF8h d User OFFFCh OFFFFh OFFFEh OFFFFh 1 This area is available in the flash memory version only Figure 10 1 Memory Map Chapter 11 Component Placement JA1 E O re 0 O 8 O Er pue R45 O pa Em R6 pa Em Oo E CG mies 5 M J7 RES CI C sms d ODO de E E Cir o e al ETI
9. ain use conditions Further Renesas Electronics products are not subject to radiation resistance design Please be sure to implement safety measures to guard them against the possibility of physical injury and injury or damage caused by fire in the event of the failure of a Renesas Electronics product such as safety design for hardware and software including but not limited to redundancy fire control and malfunction prevention appropriate treatment for aging degradation or any other appropriate measures Because the evaluation of microcomputer software alone is very difficult please evaluate the safety of the final products or system manufactured by you Please contact a Renesas Electronics sales office for details as to environmental matters such as the environmental compatibility of each Renesas Electronics product Please use Renesas Electronics products in compliance with all applicable laws and regulations that regulate the inclusion or use of controlled substances including without limitation the EU RoHS Directive Renesas Electronics assumes no liability for damages or losses occurring as a result of your noncompliance with applicable laws and regulations This document may not be reproduced or duplicated in any form in whole or in part without prior written consent of Renesas Electronics Please contact a Renesas Electronics sales office if you have any questions regarding the information contained in this document or Renesas Electronic
10. eets all the reset timing requirements 12 Chapter 7 Modes The Renesas Starter Kit supports Boot mode and Single chip mode Details of programming the FLASH memory is described in the 7542 Group Hardware Manual 7 1 Boot mode The boot mode settings for this Renesas Starter Kit are shown in Table 7 1 Boot Mode pin settings below CNVss LSI State after Reset End High Boot Mode Table 7 1 Boot Mode pin settings The software supplied with this Renesas Starter Kit supports Boot mode using an E8a and High performance Embedded Workshop only However hardware exists to enter boot mode manually do not connect the E8a in this case Press and hold the SW1 BOOT The CNVss pin is held in its boot state while reset is pressed and released Release the boot button The BOOT LED will be illuminated to indicate that the microcontroller is in boot mode When neither the E8a is connected nor the board is placed in boot mode as above the CNVss pin is pulled low by a 4 7k resistor When an E8a is used the CNVss pin is controlled by the E8a 7 2 Single chip mode Because the CNVss pin is pulled low this Renesas Starter Kit will always boot in Single chip mode when the E8a is not connected and the boot switch is not depressed Refer to 7542 Group Hardware Manual for details of Single chip mode CNVss LSI State after Reset End Low Single Chip Mode Table 7 2 Single Chip Mode pin settings 13 Chapter
11. er LED x4 POWER Green Control x2 1Green 1Orange 2Red NL oJ LN l LEDs BOOT Orange ETT ESSES ee SY Figure 5 1 Block Diagram Figure 5 2 is representative of the connections required to the Renesas Starter Kit USB Cable E8a emulator S User Interface Cable D Iele rpo eru soaa Figure 5 2 Renesas Starter Kit Connections Chapter 6 User Circuitry 6 1 Switches There are four switches located on the board The function of each switch and its connection are shown in Table 6 1 Switch Function Microcontroller RES When pressed the Renesas Starter Kit microcontroller is reset RESET Pin6 SW1 BOOT Connects to an IRQ input for user controls INTO Pin17 The switch is also used in conjunction with the RES switch to place Port3 pin 7 the device in BOOT mode when not using the E8a debugger SW2 Connects to a CNTR Interrupt input line for user controls CNTROPin30 Port1 pin 4 SW3 Connects to a CAP Interrupt input line for user controls CAPO Pin18 Port 0 pin 0 Table 6 1 Switch Functions R efer to schematic for detailed connectivity information 6 2 LEDs There are six LEDs on the Renesas Starter Kit board The green POWER LED lights when the board is powered The orange BOOT LED indicates the device is in BOOT mode when lit The four user LEDs are connected to an IO port and will light when their corresponding port pin is set
12. eripheral device initialisation code The Renesas Starter Kit board contains all the circuitry required for microcontroller operation NOTE This manual describes the technical details of the Renesas Starter Kit for 7542 hardware The Quick Start Guide and Tutorial Manual provide details of the software installation and debugging environment Chapter 3 Power Supply 3 1 Requirements This Renesas Starter Kit operates from a 3V to 5V power supply A diode provides reverse polarity protection only if a current limiting power supply is used All Renesas Starter Kit boards are supplied with an E8a debugger This product is able to power the board with up to 300mA When the Renesas Starter Kitis connected to another system then that system should supply power to the Renesas Starter Kit All Renesas Starter Kit boards have an optional centre positive supply connector using a 2 1mm barrel power jack Warning The Renesas Starter Kit is neither under nor over voltage protected Use a centre positive supply for this board 3 2 Power Up Behaviour When the Renesas Starter Kit is purchased the Renesas Starter Kit board has the Release or stand alone code from the example tutorial code pre programmed into the Renesas microcontroller On powering up the board the user LEDs will start to flash After 200 flashes or after pressing a switch the LEDs will flash at a rate controlled by the potentiometer Chapter 4 Board Layout 4 1 Compone
13. ference Function Fitted Alternative Removed Related To R42 RS232 Transceiver Disables RS232 Serial Enables RS232 Serial R43 R44 Transceiver Transceiver R43 Programming Serial Connects RS 232 port to Disconnected R42 R44 Port Programming SCI port R44 Programming Serial Connects RS 232 port to Disconnected R42 R43 Port Programming SCI port Table 6 7 Serial Configuration Links Table 6 8 below describes the function of the option links associated with Analog configuration The default configuration is indicated by BOLD text Option Link Settings Reference Function Fitted Alternative Removed Related To R8 AD_POT Connects AD_POT to ANO Disconnected Input R21 Reference Voltage Connects Board VCC supply Reference Voltage MUST be R18 R19 R20 to Reference Voltage supply provided from external interface Table 6 8 Analog Configuration Links Table 6 9 below describes the function of the option links associated with other options The default configuration is indicated by BOLD text Option Link Settings Reference Function Fitted Alternative Removed Related To R36 SW1 Connects SW1 to INTO Input Disconnected R37 E8a Enables E8a Connection Do not remove a option resister R47 Pin Function Select Connects microcontroller pin 15 MUST be removed if R48 R48 to lO 3 fitted R48 Pin Function Select Connects microcontroller pin Should be removed if R47 fitted
14. low Table 6 2 below shows the LED pin references and their corresponding microcontroller port pin connections LED Reference Colour Microcontroller Port Pin function Microcontroller Pin As shown on silkscreen Number LEDO Green Port 3 0 12 LED1 Orange Port 3 1 13 LED2 Red Port 3 2 14 LED3 Red Port 0 3 21 Table 6 2 LED Port 6 3 Potentiometer A single turn potentiometer is connected to ANO P2 0 of the microcontroller This may be used to vary the input analog voltage value to this pin between VREF and Ground 6 4 Serial port The microcontroller programming serial port 2 is connected to the E8a connector This serial port can optionally be connected to the RS 232 transceiver as well by fitting option resistors The connections to be fitted are listed in the Table 6 3 Description Function Fit for RS232 TxD2 Programming Serial Port R44 RxD2 Programming Serial Port R43 Table 6 3 Serial Port settings Other serial port is connected to the application headers 6 5 LCD Module A LCD module is supplied to be connected to the connector 8 This should be fitted so that the LCD module lies over J 2 Care should be taken to ensure the pins are inserted correctly into J 8 The LCD module uses a 4 bit interface to reduce the pin allocation No contrast control is provided this is setby a resistor on the supplied display module The module supplied with the
15. mn on Me ate o 10 25 Mode Suppolt sz ara A ama aa ached ako adit 10 3 Breakpoint Gupport era nc cnn rca nn arara cnn 104 Memory Map sss so e SG ea A rta Chapter 11 Component Placement Chapter 12 Additional Information rear erananaartanae Chapter 1 Preface Cautions This document may be wholly or partially subject to change without notice All rights reserved Duplication of this document either in whole or part is prohibited without the written permission of Renesas Solutions Corp Trademarks All brand or product names used in this manual are trademarks or registered trademarks of their respective companies or organisations Copyright Renesas Solutions Corp 2007 All rights reserved Renesas Technology Europe Ltd 2007 All rights reserved Renesas Technology Corp 2007 All rights reserved Website http www renesas com Glossary ADC Analog to Digital Converter IRQ Interrupt ReQuest CPU Central Processing Unit LCD Liquid Crystal Display DAC Digital to Analog Converter LED Light Emitting Diode E8a E8a On chip debugger module LSI Large Scale Integration HEW High performance Embedded Workshop MCU Microcontroller Chapter 2 Purpose This Renesas Starter Kit is an evaluation tool for Renesas microcontrollers Features include e Renesas Microcontroller Programming e User Code Debugging e User Circuitry such as Switches LEDs and potentiometer s e User or Example Application e Sample p
16. nesas Electronics does not warrant that such information is error free Renesas Electronics assumes no liability whatsoever for any damages incurred by you resulting from errors in or omissions from the information included herein Renesas Electronics products are classified according to the following three quality grades Standard High Quality and Specific The recommended applications for each Renesas Electronics product depends on the product s quality grade as indicated below You must check the quality grade of each Renesas Electronics product before using it in a particular application You may not use any Renesas Electronics product for any application categorized as Specific without the prior written consent of Renesas Electronics Further you may not use any Renesas Electronics product for any application for which it is not intended without the prior written consent of Renesas Electronics Renesas Electronics shall not be in any way liable for any damages or losses incurred by you or third parties arising from the use of any Renesas Electronics product for an application categorized as Specific or for which the product is not intended where you have failed to obtain the prior written consent of Renesas Electronics The quality grade of each Renesas Electronics product is Standard unless otherwise expressly specified in a Renesas Electronics data sheets or data books etc Standard Computers office eq
17. nt Layout The following diagram shows the top layer component layout of the board Application Board Interface Reset Switch Debug LCD RS232 Serial Power Power LED Microcontroller Pin Headers J1 to J4 E8a Header User LED Boot LED User Boot Switch User Switches Application Board Interface Potentiometer Figure 4 1 Board Layout 4 2 Board Dimensions The following diagram gives the board dimensions and connector positions All through hole connectors are on a common 0 1 grid for easy interfacing sn o Co E il 45 00mm A A A 14 00mm tO N X al ZS 3 Slo 3 SIS 3 E 3 y y 50 80mm 4 gt 80 00mm 4 85 00mm Figure 4 2 Board Dimensions Chapter 5 Block Diagram Figure 5 1 is representative of the CPU board components and their connectivity Power Jack Option PF gt gt gt gt gt gt BOOT Application Board A Boot mode pins Circuitry i Interface Microcontroller Pin RESET pin D type 3 i Headers Latch O i Microcontroller 1 E8a f w l Q l IRQ pins O Serial Connector Option l 5 rrr ADC Input VO amp D p ies e v o LO o o swe sw SW RES BOOT Switches ae NNNN LCD Display i Potentiometer Da wi Us
18. ow the standard application header connections Marked pins are subject to option links JAl Pin Header Name Circuit Net Device Pin Header Name Circuit Net Device Name Pin Name Pin 1 Regulated Supply 1 CON 5V 2 Regulated Supply 1 GROUND 3 Regulated Supply 2 CON 3V3 4 Regulated Supply 2 GROUND 5 Analogue Supply NC 6 Analogue Supply NC 7 Analogue Reference CON_VREF 5 8 ADTRG NC 9 ADCO ADO 31 10 ADCI1 AD1 32 11 ADC2 AD2 1 12 ADC3 AD3 2 13 DACH NC 14 DACI NC 15 0Portd WO 12 16 IOPortl 10 1 13 17 IOPort2 IO 2 14 18 IOPort3 10_3 15 19 IOPort4 IO 4 16 20 IOPort5 10 5 3 21 IOPort8 IO 67 4 22 IOPort7 107 20 23 IRQ3 NC 24 PC Bus 3rd pin NC 25 PC Bus NC 26 PC Bus NC Table 9 5 J A1 Standard Generic Header JA2 Pin Header Name Circuit Net Device Pin Header Name Circuit Net Device Name Pin Name Pin 1 Reset RESn 6 2 External Clock Input CON XIN 9 3 Interrupt NC 4 Regulated Supply 1 GND 5 SPARE NC 6 Serial Port SClaTX 27 7 Interrupt IRQO 17 8 Serial Port SClaRX 26 9 Interrupt IRQ1 15 10 Serial Port SClaCK 28 11 Motor up down NC 12 Serial Port Handshake CTS RTS 29 13 Motor control NC 14 Motor control NC 15 Motor control NC 16 Motor control NC 17 Motor control NC 18 Motor control NC 19 Timer Output TMRO 21 20 Timer Output TMR1 19 21 Timer Input TRIGa 30 22 Timer Input TRIGb 18 23 Interrupt NC 24
19. s products or if you have any other inquiries Note 1 Renesas Electronics as used in this document means Renesas Electronics Corporation and also includes its majority owned subsidiaries Note 2 Renesas Electronics product s means any product developed or manufactured by or for Renesas Electronics LENESAS C 7 D me d lt D D Renesas Starter Kit for 7542 User s Manual RENESAS SINGLE CHIP 8 BIT CMOS MICROCOMPUTER 740 FAMILY Renesas Electronics Rev 2 00 2007 08 www renesas com Table of Contents Chapter Vs Preface aa ke spi iaa Ghapter 2 Purposes sss ANON Chapter 3 Power Supply AANEREN 3 1 e LEET 3 2 Power Up Behaviour s iieiea aee NAT i R A AE RS Chapter A Board Layout 4il Component Layos 4 2 Board Dimensions errekai iaee ar aaa ae e a are aaaea Chapter 5 Block Diagram cnn nora nr arrancan Chapter 6 User Circuitry arinireki 6f SWICNES ina EE 0 2 BEE 6 3 Potentlometo f seigrst os deeg A ti iras Dit cola 6 4 Serial port sss IAA Ii 6S LCD MOdlle stesso DR erte abatar iria 6 6 Option Lu 6 7 Oscillator Sources iii c cnn rra 6 8 Reset Circuits ss iain vein E tt eet Chapter 7 MOdeS saca ek KT ib ki ato fel ele t ue TEE el EE elle Mee Chapter 8 Programming Methode Chapter 9 leader sd maren etapo Brr sarebbe a oo erg deu 9 1 Microcontroller Headers AAA 9 2 Application TT TC Chapter 10 Code Development 10 15 OVERVIEW
20. uipment communications equipment test and measurement equipment audio and visual equipment home electronic appliances machine tools personal electronic equipment and industrial robots High Quality Transportation equipment automobiles trains ships etc traffic control systems anti disaster systems anti crime systems safety equipment and medical equipment not specifically designed for life support Specific Aircraft aerospace equipment submersible repeaters nuclear reactor control systems medical equipment or systems for life support e g artificial life support devices or systems surgical implantations or healthcare intervention e g excision etc and any other applications or purposes that pose a direct threat to human life You should use the Renesas Electronics products described in this document within the range specified by Renesas Electronics especially with respect to the maximum rating operating supply voltage range movement power voltage range heat radiation characteristics installation and other product characteristics Renesas Electronics shall have no liability for malfunctions or damages arising out of the use of Renesas Electronics products beyond such specified ranges Although Renesas Electronics endeavors to improve the quality and reliability of its products semiconductor products have specific characteristics such as the occurrence of failure at a certain rate and malfunctions under cert
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