E1 Emulator Additional Document for User`s Manual
Contents
1. LENESAS E1 Emulator Additional Document for User s Manual Notes on Connection for 78KO Supported Devices 78KO Family All information contained in these materials including products and product specifications represents information on the product at the time of publication and is subject to change by Renesas Electronics Corp without notice Please review the latest information published by Renesas Electronics Corp through various means including the Renesas Technology Corp website http www renesas com Renesas Electronics R20UTO852EDO100 Rev 1 00 www renesas com October 6 2011 Notice e 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 hereby under any patent2. 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 Contents Table of Contents Chapter 1 OUIINO A sevens ee 4 11 Se ULeo hbhib hH R pier oad iets yaad rN oE eee 4 1 2 Cautions on Using E20 c cece ener eee etter erent eee tne ee eet ae ee ee ea deee ee saaeeeeeeaaaeeeseeaeeeeeenaeeeseenaes 4 1 3 Configuration Of Manuals sees entree ee ee ee erent ee eeeaeee ee naaeeeeeeaaeeeeesaeeeeeeneeeseeaes 4 Chapter 2 Designing the User System cccccceeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeees 5 2 1 Connecting the Emulator with the User System 00 0 ec ciceeeeeeeeeeneeeeeeceeeeeenaeeeeeenaeeeeeeneeeeeeaas 5 2 2 Pin Assignment of the Connector on the User System sese seeeeeesseeeenenseenannneeeaato 6 2 3 System Configuration 22 ma ot Week rete l KN a eee A pee ee 7 2 4 Examples of Recommended Connection Circuits Between Emulator Connection Connector and MCU Recommend Circuit Connection sess sssrini kenenin iE EEA EREA A 7 2 4 1 Cautions on creating recommended circuits and examples of circuit connection 7 2 4 2 Connection of reset pin sr s mesis anirno onn iri eks ko TAK innana naiaiae nananana inanin 10 Chapter 3 OQECINICA ON sissien onnea ke
3. system by the E1 E20 Securely connect both pin 10 and pin 13 These pins are also used to monitor the user system IT uuu 2 2 October 2011 RENESAS Designing the User System 2 3 System Configuration Figure 2 2 shows the system configuration used for the E1 E20 For cautions on connection refer to the E1 E20 User s Manual Figure 2 2 Connection Diagram of E1 E20 USB Interface cable User interface cable E1 emulator or User system E20 emulator User interface cable E20 38 pin 14 pin conversion adapter Remark To use it with the E20 connect the 38 pin 14 pin conversion adapter to the user interface cable E20 38 pin is not supported 2 4 Examples of Recommended Connection Circuits Between Emulator Connection Connector and MCU Recommend Circuit Connection 2 4 1 Cautions on creating recommended circuits and examples of circuit connection The following are common cautions on creating recommended circuits The circuits and resistance values listed are recommended but not guaranteed Determine the circuit design and resistance values by taking into account the specifications of the target device and noise For flash programming for mass production perform sufficient evaluation about whether the specifications of the target device are satisfied TT TT a OppPFP PET October 2011 RENESAS Designing the User System For processing of pins not used by the E1 E20 refer to the user s manua
4. 851ED0100 Rev 1 00 FET October 2011 RENESAS Designing the User System Figure 2 3 Using One Connector for Both Debugging and Programming TOOLCx TOOLDx Notes Communication x 0 1 Vop DD Vi Target device T 1 kQ Voo TOOLCx 1 Target connector Reset circuit R F U GND 10 kQ 3k to 10 kQ RESET_INNote2 TxD DATA TOOLDx Voo R F U RESET OUT R F U GND Vss RESET_OUTN 2 RESET L GND 1 When the external clock is used use the TOOLC1 and TOOLD1 pins for debugging 2 This connection is designed assuming that the RESET signal is output from the N ch open drain buffer output resistance 100 Q or less For details refer to 2 4 2 Connection of reset pin Figure 2 4 Using One Connector for Both Debugging and Programming OCD0A OCD0B Communication Reset circuitN Voo Voo Vov Target connector Target REU F ik Skt r i Vo GND cient FLMDO FLMDO RxD RESETN9e OCDOA X1 OCDOB X2 R20UT0851ED0100 Rev 1 00 RENESAS Page 9 of 21 October 2011 Designing the User System Notes 1 During on chip debugging the X1 oscillation circuit cannot be used as the operation clock of the target device 2 This connection is designed assuming that the RESET signal is output from the N ch open drain buffer output resistance 100 Q or less For details refer to 2 4 2 Connection of reset pin 3 The circuit enclo
5. ET OUT pin of E1 E20 Consequently the target device s POC function performs pseudo emulation Note that there is an error of 1 V between the POC detection voltage and the target system voltage Note that the POC detection voltage might be 1 V higher than that of the target device Device with without on chip debug function Only the devices with the on chip debug function can be debugged See the user s manual of the target device for checking whether it is equipped with the on chip debug function To debug a device without the on chip debug function perform debugging by using an upper compatible product The following shows an example when using the 78KO KF2 Target Device On Chip Debug Function Device for Debugging Io Not equipped HPDT8F0547D uPD78F0545 Set the IMS and IXS registers to uPD78F0546 values according to the target device HPD78F0547 Cautions when reading the location and the reserved area where SW HW breaks are set When the addresses where the software breaks are set are read the data read from the addresses differ from the actual data When the addresses where the hardware breaks are set are read breaks occur When the addresses where are reserved for E1 the operations differ depending on the following usages by the software breaks When software breaks are not used The data read from the addresses may differ from the actual data e When software breaks are used The data read from th
6. ailable must be connected to host machine RENESAS Page 13 of 21 Notes on Usage Chapter 4 41 Table 4 1 42 No 1 No 2 Notes on Usage This section describes cautions on use of the E1 E20 emulator To use the E1 E20 properly read the cautions thoroughly List List of notes on usage Handling the device used for debugging Rewriting of the flash memory during debugging Software brake Self programming Boot swapping during self programming Emulation in the self programming mode Stack pointer initialization fail safe function Downloading a HEX file Cautions on using step in step execution Cautions on using the pseudo real time RAM monitor function Emulation of the POC function Devices with without the on chip debug function Cautions on reading locations with a break or reserved areas Operation after a reset CO NN O On B do D Details Handling of device that was used for debugging Do not mount a device that was used for debugging on a mass produced product Because the flash memory was rewritten during debugging and the number of rewrites of the flash memory cannot be guaranteed Do not embed the monitor program for debugging in a mass produced product Overwriting flash memory during on chip debugging If the following debugger operations lt 1 gt to lt 8 gt are performed on chip the flash memory in the device is overwritten If
7. any of the following debugger operations lt 1 gt to lt 8 gt which involve flash memory rewriting is performed while flash memory cannot be rewritten the debugger automatically changes the register setting so as to enable flash memory rewriting and restores the register setting after the operation is completed If any of the following operations lt 1 gt to lt 8 gt is performed while flash memory rewriting is disabled or operation is performed at a voltage at which flash memory cannot be rewritten however the debugger outputs an error and the operation is ignored lt 1 gt Writing to internal flash memory lt 2 gt Program execution after specifying or canceling software breakpoints lt 3 gt Setop over execution Return Out execution lt 4 gt Come Here R20UT0851ED0100 Rev 1 00 RENESAS Page 14 of 21 October 2011 Notes on Usage No 3 No 4 No 5 No 6 5 If Permit is selected in the Target Power off area in the Configuration dialog box the following operations can not be performed a Specifying changing or canceling hardware breakpoints b Un Masking internal resets c Switching peripheral breakpoints d Program execution e Software reset a reset performed by the debugger 6 Adding changing or deleting the monitor address when using the pseudo real time RAM monitor function lt gt Performing operations without using breakpoints when software breakpoints are specified lt 8 gt When th
8. ble 3 1 E1 E20 Specification List Middle Item arget host machine Specification Computer equipped with a USB port OS depends on the software User system interface 14 pin connector Host machine interface USB2 0 Full speed High speed Connection to the user system Connection by the provided user system interface cable Power supply function 3 3 V or 5 0 V set in software tool can be supplied to the user system with current up to 200 mA Power supply for the emulator Software break No need the host computer supplies power through the USB 2000 points lt 1 point commonly used by execution Break Hardware break land access lt Forced break Available lt Number ofevenis 1 es commonly used by execution VI Event land access vailable function Hardware break only lt Related race Unavailable lt debugging Measurement item From run to break lt Performance measurement Performance Resolution 100 us Max measurement e time 100 hours Pseudo realtime RAM monitor RRM Available CEU is used when lt monitoring Dynamic memory modification DMM Available CPU is used when changing Hot plug in Unavailable 10 byte ID code authentication Clock mounted on the user system can be used Related programming Security flag setting Available Standalone operation R20UTO851EDO100 Rev 1 00 October 2011 Unav
9. bu ebu ka ra eaaa aaia RERS 13 Chapter 4 Notes on sage ian ninn teenie ne ncn 14 4 1 CIST arhei oseo E nl a AE fad GUN 14 42 BE e erori anao a a ia i an rn pea 14 Appendix Equivalent Circuit for E1 E20 78KOR Connection 18 R20UT0851ED0100 Rev 1 00 RENESAS Page 3 of21 October 2011 Outline October 2011 Chapter 1 Outline 11 Features E1 E20 Emulator hereinafter referred to as E1 E20 is an on chip debug emulator with flash programming function which is used for debugging and programming a program to be embedded in on chip flash memory microcontrollers This product can debug with the target microcontroller connected to the user system and can write programs to the on chip flash memory of microcontrollers 1 2 Cautions on Using E20 The functions used for debugging of the 78KO device by using the E20 are the same as in the E1 Large trace function characteristic functions of the E20 cannot be used The power supply function from the E20 is not supported 1 3 Configuration of Manuals Documentation for the E1 E20 emulator manual is in two parts the E1 E20 Emulator User s Manual and the E1 E20 Emulator Additional Document for User s Manual this manual Be sure to read both of the manuals before using the E1 E20 emulator 1 E1 E20 Emulator User s Manual The E1 E20 Emulator User s Manual has the following contents e Components of the emulators e Emulator hardware specification e Connection to the emu
10. cs 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 Electronics products or if you have any other inquiries
11. e addresses may differ from the actual data or breaks may occur Operation after a reset After a reset of the external pin or an internal reset the time from the occurrence of the reset to the execution of the user program is different from the actual device operation because the debugging monitor program performs initialization processing for debugging R20UT0851ED0100 Rev 1 00 RENESAS Page 17 of 21 October 2011 Notes on Usage Appendix Equivalent Circuit for E1 E20 78KOR Connection The internal equivalent circuit related to the communication interface between the E1 E20 and user system is shown below An example of circuit connection for the user system is shown in this document Please use it as a reference when determining parameters in board design Figure A 1 E1 E20 Equivalent Circuit Inside the E1 E20 Target system side Pin numbers of the target connector SN74LVC8T245 RD74LVC125B 100 kQ Vpo SN74LVC2T45 kaso RD74LVC125B VDp RD74LVC125B SN74LVC8T245 100 kQ 220 13 DTC124EE R20UTO851ED0100 Rev 1 00 RENESAS 1 1 Page t80f2 Ss Page 18 of 21 October 2011 E1 Emulator Additional Document for User s Manual Notes on Connection for 78KOR Publication Date Oct 06 2011 Rev 1 00 Published by Renesas Electronics Europe GmbH LENESAS SALES OFFICES Renesas Electronics Corporation Refer to http www renesas com for the latest and detailed information http www renesas co
12. e debugger is started or terminated It takes a while from the completion of flash memory programming until control is passed to the GUI Software break During program running do not rewrite the data at the address where a software break is set This includes self programming and rewriting to RAM If performed the instruction placed at the address may be invalid Self Programming If the space where the monitor program for debugging is rewritten by flash self programming the debugger does not operate correctly This also holds true when boot swapping is executed Boot swapping during self programming The boot swapping function cannot be emulated This is because boot swapping moves the memory spaces used for debugging and thus the debug communication can no longer be performed Emulation in self programming mode For self programming the mode is switched from normal mode to self programming mode MOV PFCMD 0A5H MOV FLPMC 1H 1 MOV FLPMC 0FEH MOV FLPMC 1H eee nena nena nan enan From this position CALL 08100H 2 t MOV PFCMD 0A5H MOV FLPMC 0H Mode A1 MOV FLPMC 0FEH MOV FLPMC 0H mr eme nnn nn cana nnn nn nena nena nan nananenannnan To this position R20UT0851ED0100 Rev 1 00 RENESAS Page 15 of 21 October 2011 Notes on Usage No 7 No 8 No 9 No 10 The section between 2 and 3 is in self programming mode A1 Step execution or debug operations such as stopping progra
13. easurement 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 certain use conditions Further Renesas Electroni
14. eps Stepping into code Instructions in the user created program are executed one by one Continuous execution The user created program is executed from the current PC value Operation at voltage with which flash memory cannot be written lt 1 gt The user program is stopped while the pseudo real time RAM monitor function processing is being performed Example When 78K0 Kx2 30x n 1 us per n bytes when operating at 2OMHz When 78K0 Kx2 L 120x n 1 us per n bytes when operating at 2OMHz lt 2 gt If the pseudo real time RAM monitor function is executed during a standby state the standby state is released lt 3 gt If the clock signal switches to that generated by the internal low speed oscillator or to the subsystem clock signal by the user created program is stopped for about 200 clock cycles by pseudo real time RAM monitoring lt 4 gt Pseudo real time RAM monitoring updates RAM information in byte units Therefore even if information is displayed in word units in the debugger there will be a difference of a few ms in updating the higher and lower byte data R20UT0851ED0100 Rev 1 00 RENESAS Page 16 of 21 October 2011 Notes on Usage No 11 No 12 No 13 No 14 5 The pseudo real time RAM monitor does not operate during execution of self programming Emulation of POC function If power supply to the target system is turned off during debugging the target device enters the reset state by the RES
15. l of the device e Connect the TxD transmission side of the target device to the RxD reception side of the target connector Connect the TxD transmission side of the target connector to the RxD reception side of the target device Securely connect pins 2 12 and 14 of the connection to GND of the user system These pins are used for electrical grounding as well as for monitoring of connection with the user system by the E1 E20 e Securely connect both pin 10 and pin 13 These pins are also used to monitor the user system Pins for on chip debugging and programming vary depending on the device Refer to Table 2 4 In a circuit using the external oscillator debugging with the debug pin connected to the external oscillator cannot be done When using the pins used for debugging or serial programming in your circuit use a jumper for isolation to avoid conflict of signals For details refer to 2 4 3 Cautions on connecting the user circuit to the RxD pin of the target device Table 2 4 Supported Device and Interfaces Supported Device Programming Debug Circuit diagram Interface Interface 78K0 Kx2 L 78KO lx2 TOOLCx TOOLDx x 0 1 Figure 2 3 78KO Fx2 L 78KO0 Kx2 HPD78F8039 HPD78F8017 to uPD78F8020 HPD78F8026 to uPD78F8039 78K0 Kx2 A Figure 2 4 es TORO UART GEOI Figure 2 6 pikis Check the available channels in the user s manual of the target device chapter on flash memory R20UT0
16. lator and the host computer and user system 2 E1 E20 Emulator Additional Document for User s Manual The E1 E20 Emulator Additional Document for User s Manual has the following contents e For use in hardware design an example of connection and the interface circuit required to connect the emulator e Notes on using the emulator R20UT0851ED0100 Rev 1 00 RENESAS Page 4 of21 Designing the User System Chapter 2 21 Table 2 1 Figure 2 1 Designing the User System To connect the E1 E20 emulator a connector for the user system interface cable must be mounted on the user system When designing the user system read this section of this manual and the hardware manual for the MCUs Connecting the Emulator with the User System Table 2 1 shows the connector type numbers of the E1 emulators Connector Type Numbers Type Manufacturer Specifications Number 14 pin 7614 6002 Sumitomo 3M Limited 14 pin straight type Japan Connector 2514 6002 3M Limited 14 pin straight type other countries Figure 2 1 shows examples of the connection between a user system interface cable of the 14 pin type Do not mount other components with a height exceeding 10 mm within 5 mm of the connector on the user system 38 pin of the E20 is not supported To use the E20 use the 38 pin 14 pin conversion adapter ROEO00200CKAOO that comes with the E20 for connection Connecting the User System Interface Cable to the 14 pi
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18. m execution cannot be performed in this section In addition do not set a software break in the section between 1 and 3 otherwise the execution continues without a break but emulation is not performed normally Break function for stack pointer initialization failure This function executes a break when an interrupt occurs or a PUSH instruction is executed while the initial setting has not been made for the stack pointer If the manipulation or instruction shown below is executed immediately after a reset operation the break function for stack pointer initialization failure becomes invalied e Setting a software break e Write to the stack pointer from the Register window e Write to the memory window etc If a software break occurs while the initial setting has not been made for stack pointer the message Uninitialized Stack Pointer is displayed on the status bar The subsequent operations are not performed normally so make sure to set the SP value in the user program Caution on downloading a HEX file When downloading a HEX file do not set a filling value other than OxFF for the option U of the Renesas object converter Cautions when stepping into code The value of some SFRs special function registers might remain unchanged while stepping into code If the value of the SFRs does not change while stepping into code operate the microcontroller by continuously executing the instructions instead of executing them in st
19. n Connector of the E1 Emulator 14 pin user system interface cable Top View Area with limit on mounted components heights must be no greater than 10mm R20UT0851ED0100 Rev 1 00 RENESAS Page 5 of 21 October 2011 Designing the User System 2 2 Pin Assignment of the Connector on the User System Table 2 2 shows the pin assignments of the 14 pin connectors Table 2 2 Pin assignments of the connector 14 pin Note 1 Pin Name Input Output R F U GND Z CLK Output FLMDO Output RxD Input RESET IN Input TxD DATA Output Input and Output VDD R F U Output RESET OUT Output R F U mi GND z _ RESET OUT E3 Output GND Z ojlo N O DI SIM rp gt Table 2 3 Pin Functions RESET_IN Pin used to input reset signal from the user system RESET OUT Output Pin used to output reset signal to the target device FLMDO Output Pin used to set the target device to debug mode or programming mode TOOLO Output Input Pin used to transmit command data to the target device TOOL1 Pin used to input clock signal to the target device R F U This pin is reserved For the connection of the reserved pins see each circuit related to the pins nee As seen from E1 E20 eee Securely connect pins 2 12 and 14 of the connector to GND of the user system These pins are used for electrical grounding as well as for monitoring of connection with the user
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21. s 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 Renesas Electronics does no
22. sed by a dashed line is designed for flash self programming which controls the FLMDO pin via ports This circuit is used to control the port during flash programming Connect any port that can output data to FLMDO via a resistor When not using flash self programming process the pins according to the device specifications 4 Table 2 5 shows the JP1 setting Table 2 5 JP1 Setting JP1 Setting On chip debugging 1 OOI 3 1 3 short 2 4 short 2009 4 Flash programming 1 Ie 3 1 2 short 3 4 open HIS E1 E20 not connected 1 3 all open 2 OJO 4 2 4 2 Connection of reset pin This section describes the connection of the reset pin for which special attention must be paid in circuit connection examples shown in the previous section During on chip debugging a reset signal from the target system is input to E1 E20 masked and then output to the target device Therefore the reset signal connection varies depending on whether E1 E20 is connected For flash programming the circuit must be designed so that the reset signals of the user system and E1 E20 do not conflict Select one of the following methods and connect the reset signal in the circuit The details of each method are described on the following pages 1 Automatically switching the reset signal via series resistor recommended described in recommended circuit connection in the previous section N Manually switching the reset signal with j
23. t 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 equipment communications equipment test and m
24. th Reset Circuit That Contains No Buffers Target connector Target device Reset circuit RESET OUT RESET IN Remark Make the resistance of R1 at least ten times that of R2 R1 being 10 KQ or more The circuit enclosed by a dashed line is not required when only flash programming is performed 2 Manually switching the reset signal with jumper Figure 2 6 illustrates the circuit connection for the case where the reset signal is switched using the jumper with or without E1 E20 connected This connection is simple but the jumper must be set manually Figure 2 5 Circuit in connection for Switching Reset Signal with Jumper Target connector Jumper RESET_OUT Target device Reset circuit Jumper setting When E1 E20 is connected 1 2 shorted When E1 E20 is not connected 2 3 shorted 3 Resetting the target device by power on reset POR only Figure 2 7 illustrates the circuit connection for the case where the target device is only reset via POC without using the reset pin RESET_OUT becomes active when power is applied to E1 E20 Even if power supply to the target system is turned off during debugging pseudo POC function emulation is available because RESET_OUT becomes active Figure 2 6 Circuit Connection for the Case Where Target Device Is Only Reset via POC Target connector Vpo Target device RESET OUT RESET IN 6 R20UT0851ED0100 Rev 1 00 RENESAS Page 12 of 21 Specification Chapter 3 Specification Specifications are shown in Table 3 1 below Ta
25. umper wo Resetting the target device by power on reset POC only 1 Automatically switching the reset signal via series resistor Figure 2 4 illustrates the reset pin connection described in 2 5 1 Recommend Circuit Connection TT TT OOO aeaee October 2011 RENESAS Designing the User System Figure 2 4 Remark This connection is designed assuming that the reset circuit on the target system contains an N ch open drain buffer output resistance 100O or less The Vpp or GND level may be unstable when the logic of RESET IN OUT of E1 E20 is inverted so observe the conditions described below in Remark Circuit Connection with Reset Circuit That Contains Buffer Target connector Target device Reset circuit RESET OUT RESET IN Make the resistance of R1 at least ten times that of R2 R1 being 10 kQ or more Pull up resistor R2 is not required if the buffer of the reset circuit consists of CMOS output The circuit enclosed by a dashed line is not required when only flash programming is performed Figure 2 5 illustrates the circuit connection for the case where the reset circuit on the target system contains no buffers and the reset signal is only generated via resistors or capacitors Design the circuit observing the conditions described below in Remark R20UT0851EDO100 Rev 1 00 RENESAS Page 11 of 21 October 2011 Designing the User System October 2011 Figure 2 5 Circuit Connection wi
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