AN1635/0703 1/5 AN1635 application note st7 customer rom code release information by mcd applications introduction when their st7 rom code is ready to be mask programmed, customers send their execut- able file to st in motorola .s19 format. when st receives it, this file is reformatted by a propri- etary automation tool called newget in order to generate the mask levels and test patterns for manufacturing and testing the devices. consequently, when customers receive back their rom code for validation before st pro- grams their parts, they receive a file in a different format from the one they sent originally. to help customers understand why the file is different, this application note lists the modifications that occur when the file is processed by newget. 1
2/5 st7 customer rom code release information 1 list of changes here are the modifications made to the executable file during newget processing: n the first lines0 is removed (useless info common to all s19 files) n the software is sorted by device memory address n device memory unused by your software is filled with "ff" 2 .s19 file structure figure 1. s19 file description note: the line checksum is calculated with the formula: ff-(all the bytes in the line including code, address and total number of bytes per line). s00600004844521b s1 13 e000 ae ff 7f ae ff 5f 1e 05 1e 06 1f 04 a6 84 b7 32 57 s1 13 e010 a6 98 b7 31 a6 00 b7 36 a6 ff b7 37 a6 01 b7 3e 14 s1 13 e020 a6 ef b7 3f 9a 9d 20 fd 80 80 80 80 80 0f 33 09 42 s1 11 e030 0e 04 04 1e 04 20 02 1f 04 b6 35 80 80 80 f6 s1 13 ffe0 e0 28 e0 28 e0 3d e0 28 e0 28 e0 28 e0 28 e0 3c a4 s1 13 fff0 e0 28 e0 2d e0 2c e0 28 e0 2a e0 2b e0 29 e0 00 d6 s9030000fc s19 file head title (its the same for all s19 files) s19 file end line c hecksum loading addresses s19 structure file code total number of bytes per line (code + address + checksum) in hexadecimal 2
3/5 st7 customer rom code release information 3 example here is an example of .s19 code generated by any st or third-party software tool: s00600004844521b s105e0007a128e s113e002140114021400a601b781cde04bcde05aed s113e012b681b7049a9d20fdb631a808b731800ca9 s113e02233043d3f201c9839812404a601b781b6ec s113e03281b704c6e001bb3797c6e000b936b736ec s113e042bf3780808080808080a611b720a601b768 s113e0520aa6ffb705b70681a640b732a608b731ac s110e062c6e000b736c6e001b73710808174 s113ffe0e04ae04ae048e04ae04ae04ae04ae046c3 s113fff0e04ae021e047e04ae045e01ae049e00257 s9030000fc and here is the code listing after being reformatted by newget: s123e0007a12140114021400a601b781cde04bcde05ab681b7049a9d20fdb631a808b7318e s123e020800c33043d3f201c9839812404a601b781b681b704c6e001bb3797c6e000b93651 s123e040b736bf3780808080808080a611b720a601b70aa6ffb705b70681a640b732a60847 s123e060b731c6e000b736c6e001b737108081ffffffffffffffffffffffffffffffffff8c s123e080ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff9c ... (empty lines filled with ff)... s123ffc0ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff3d s123ffe0e04ae04ae048e04ae04ae04ae04ae046e04ae021e047e04ae045e01ae049e0020d s9030000fc
4/5 st7 customer rom code release information 4 checking rom content with an epb programming board its now possible to check the rom content by reading it using stvp7 (st7 visual pro- grammer), which is the programming software provided for free by st, and the epb (engineer programming board) of the target device. it should be noted that option bytes can not be read, as in a rom mcu they are coded in hardware, and not programmed in a parallel memory page like in a flash mcu. using stvp7 version 1.8.0, use the following procedure to read the rom content of your mcu: n create a shortcut for stvp.exe. you will find stvp.exe in the stvp7 installation path (by default: c:\program files\stm\st7toolchain\stvp7) n rename the new shortcut with a suitable name (stvp_rom.exe for instance) n right click on it and select properties from the pop up menu n in the shortcut tab, modify the target path: c:\programfiles\stm\st7toolchain\stvp7\stvp.exe to "c:\program files\stm\st7toolchain\stvp7\stvp.exe" -rom now when you double-click on this shortcut, the stvp7 will start in rom mode (it looks the same as flash mode except rom mode is displayed in the toolbar).
5/5 st7 customer rom code release information "the present note which is for guidance only aims at providing customers with information regarding their products in order for them to save time. as a result, stmicroelectronics shall not be held liable for any direct, indirect or consequential damages with respect to any claims arising from the content of such a note and/or the use made by customers of the information contained herein in connection with their products." information furnished is believed to be accurate and reliable. however, stmicroelectronics assumes no responsibility for the co nsequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. no license is granted by implication or otherwise under any patent or patent rights of stmicroelectronics. specifications mentioned in this publicati on are subject to change without notice. this publication supersedes and replaces all information previously supplied. stmicroelectronics prod ucts are not authorized for use as critical components in life support devices or systems without the express written approval of stmicroele ctronics. the st logo is a registered trademark of stmicroelectronics ? 2003 stmicroelectronics - all rights reserved. purchase of i 2 c components by stmicroelectronics conveys a license under the philips i 2 c patent. rights to use these components in an i 2 c system is granted provided that the system conforms to the i 2 c standard specification as defined by philips. stmicroelectronics group of companies australia - brazil - canada - china - finland - france - germany - hong kong - india - israel - italy - japan malaysia - malta - morocco - singapore - spain - sweden - switzerland - united kingdom - u.s.a. http://www.st.com
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