Programming the M16c/62 Flash in Asynchronous Serial Mode
Contents
1. any damage liability or other loss resulting from the information contained herein Renesas Technology Corporation semiconductors are not designed or manufactured for use in a device or system that is used under circumstances in which human life is potentially at stake Please contact Renesas Technology Corporation or an authorized Renesas Technology Corporation product distributor when considering the use of a product contained herein for any specific purposes such as apparatus or systems for transportation vehicular medical aerospace nuclear or undersea repeater use The prior written approval of Renesas Technology Corporation is necessary to reprint or reproduce in whole or in part these materials If these products or technologies are subject to the Japanese export control restrictions they must be exported under a license from the Japanese government and cannot be imported into a country other than the approved destination Any diversion or reexport contrary to the export control laws and regulations of Japan and or the country of destination is prohibited Please contact Renesas Technology Corporation for further details on these materials or the products contained therein2. RENESAS APPLICATION NOTE M16C 62 Programming the M16C 62 Flash in Asynchronous Serial Mode 1 0 Abstract The following article describes using an asynchronous serial port and the FlashStart application to program the user flash memory of the M16C 62 series of microcontrollers This is referred to in the M16C 62 data sheets as the Standard Serial I O Mode 2 method of flash programming 2 0 Introduction The Renesas M16C 62 series of microcontrollers is a 16 bit family of MCUs based on Renesas popular M16C CPU core These parts provide high memory efficiency power saving ability low noise emission and improved noise immunity The flash versions of the device contain flash memory that can be rewritten with a single voltage The M16C 62 flash can be programmed using one of three methods Parallel I O Mode Standard Serial I O Mode and CPU Rewrite Mode Standard Serial I O Mode can be further divided into a synchronous mode Standard Serial I O Mode 1 and an asynchronous mode Standard Serial I O Mode 2 The flash memory is divided into two major blocks a user program area and a boot ROM area The user program area is for the normal application program and data Any program in the boot ROM area is accessed only when a special hardware reset sequence is initiated This boot ROM area has a control program stored in it when shipped from the factory The program allows asynchronous or synchronous serial programming of the user area of the fl
3. ash Changes to the boot area of the flash can only be made using Parallel I O Mode Renesas provides a Windows based program FlashStart to serially download code in S record format to M16C 62 MCUs The website for downloading the program is listed in section 5 0 Reference 3 0 Hardware Requirements for Asynchronous Serial Programming The CNVSS pin on the microcontroller is the primary control line that determines whether the user area of the flash or the boot area is accessed after the release of a reset If the CNVSS pin is low the device will always access the user flash area and will start in single chip mode To execute the asynchronous serial rewrite program in the boot area of the flash the pins listed below must be connected as shown when a reset is performed either during power up of the microcontroller or by forcing the Reset line low and then setting it high Figure 1 shows a typical connection REU05B0013 0100Z June 2003 Page 1 of 6 M16C 62 E P Ni ESAS Programming the M16C 62 Flash in Asynchronous Serial Mode Pin Required Connection CNVSS Vcc CE P5 0 Vcc EPM P5 5 Vss SCLK1 P6 5 Vss i gt P55 ooo P50 s Z RS 232 or TRANSCEIVER 4 Og i 3 o7 M16C 62 a RECENE RECENE a TxD1 TTL RS 232 a 6 TRANSMIT TRANSMIT 1 o SCLK1 5 a lt Connect to PC COM iv Port Using Straight Through Serial Cable Vcc il Jumper To Enter Boot CNVss i
4. be used until the ID check is run Once the correct ID check is completed all of the following commands are available e Load ID Selects a file and checks the ID code e Blank Checks if a selected area of Flash ROM is blank e Read Compares the contents of the Flash ROM with the selected file e Status Displays the current status of the Flash ROM REU05B0013 0100Z June 2003 Page 4 of 6 M16C 62 E g N ESAS Programming the M16C 62 Flash in Asynchronous Serial Mode e E P R Erases the Flash followed by a Program cycle followed by a Read verify check e B P R Runs a Blank check followed by a Program cycle followed by a Read verify check e Program Programs the device with the selected file note that the program area must beblank e Erase Erases the entire user Flash ROM area e Setting Is used to change the Baud rate e Download Loads control program file selected into RAM and executes file M16EC Flash Start x Load ID Program Blank Erase Read Status Download area al Version BHRAS Exit Figure 5 ID Check Dialog Box When Program and other commands are selected the Input Address dialog box opens The default addresses are the low and high addresses of the file that was selected in the ID Check dialog box If a file is not selected the start and end addresses of the M16C 62 are used Input ddress X Start Ore 000 Enc OFFFFF Cancel Fi
5. g Mode SZ Figure 1 Typical Connection for Asynchronous Serial Programming 4 0 Using the FlashStart Program 4 1 Startup Selecting flashstart exe will start the program For the M16C 60 series MCUs select internal flash memory and the COM port that is connected to the hardware Select OK See Figure 2 REU05B0013 0100Z June 2003 Page 2 of 6 M16C 62 E g E N ESAS Programming the M16C 62 Flash in Asynchronous Serial Mode Select Program ntemal flash memory C M16C 80 boot loade RS232C Port com x Cancel Figure 2 Select Program Dialog Box Once communications are established the ID Check dialog box opens If a communication error occurs follow the messages to properly set up communications 4 2 Selecting a File and ID Check The ID Check dialog box is for inputting the name and ID of your work file The program uses Motorola S2 format If no ID was previously defined the ID code would be all zeros or all ones 00 hex or FF hex ID Check X FilePath C mitsuibishi flashwrt flashstit m624v202 mot p fe fo oo foo foo fo fo m MCU Type M16C 2062 M16C 80 Refer Cancel Figure 3 ID Check Dialog Box REU05B0013 0100Z June 2003 Page 3 of 6 M16C 62 E P N ESAS Programming the M16C 62 Flash in Asynchronous Serial Mode Input the path and file name in the FilePath field box and the ID code in the ID f
6. gure 6 Input Address Dialog Box REU05B0013 0100Z June 2003 Page 5 of 6 M16C 62 E P Ni ESAS Programming the M16C 62 Flash in Asynchronous Serial Mode 5 0 Reference Renesas Technology Corporation Semiconductor Home Page http www renesas com E mail Support support_apl renesas com Data Sheets e M16C 62 datasheets 62aeds pdf User s Manual e FlashStart Programmer Manual REU05B0013 0100Z June 2003 Page 6 of 6 Keep safety first in your circuit designs Renesas Technology Corporation puts the maximum effort into making semiconductor products better and more reliable but there is always the possibility that trouble may occur with them Trouble with semiconductors may lead to personal injury fire or property damage Remember to give due consideration to safety when making your circuit designs with appropriate measures such as i placement of substitutive auxiliary circuits ii use of nonflammable material or iii prevention against any malfunction or mishap Notes regarding these materials These materials are intended as a reference to assist our customers in the selection of the Renesas Technology Corporation product best suited to the customer s application they do not convey any license under any intellectual property rights or any other rights belonging to Renesas Technology Corporation or a third party Renesas Technology Corporation assumes no responsibility for any damage or infringement of any third
7. ield box Selecting the Refer button will open a browse window to locate the file on your PC If the ID file is in the same folder refer to the FlashStart manual the ID code is loaded when the file is selected If there is no ID file a warning message will be shown that indicates the ID file cannot be found Select OK in the warning box and enter the correct ID bytes in the ID boxes or FF or 00 in the boxes if there is no ID code being used ID Check x FilePath C projects count count mot M16C Flash Start ID IN Can not found the ID file m MCU Type Refer Figure 4 ID Check Dialog Box Once the ID code has been entered selecting the OK button will start the ID check and opens the FlashStart Programmer window This allows the device commands to be executed If an ID matching error occurs the FlashStart Programmer window will still open however the user will be unable to execute the commands In this case recheck the ID code Selecting the Cancel button will open the FlashStart Programmer window without running an ID check The FlashStart allows device commands to be used with cleared flash without performing an ID check 4 3 FlashStart Programming Window The FlashStart Programming window executes device commands If the flash MCU is cleared the device commands can be used without running an ID check However if the flash is written only the Load ID Status and Setting commands can
8. party s rights originating in the use of any product data diagrams charts programs algorithms or circuit application examples contained in these materials All information contained in these materials including product data diagrams charts programs and algorithms represents information on products at the time of publication of these materials and are subject to change by Renesas Technology Corporation without notice due to product improvements or other reasons It is therefore recommended that customers contact Renesas Technology Corporation or an authorized Renesas Technology Corporation product distributor for the latest product information before purchasing a product listed herein The information described here may contain technical inaccuracies or typographical errors Renesas Technology Corporation assumes no responsibility for any damage liability or other loss rising from these inaccuracies or errors Please also pay attention to information published by Renesas Technology Corporation by various means including the Renesas Technology Corporation Semiconductor home page http www renesas com When using any or all of the information contained in these materials including product data diagrams charts programs and algorithms please be sure to evaluate all information as a total system before making a final decision on the applicability of the information and products Renesas Technology Corporation assumes no responsibility for
Download Pdf Manuals
Related Search