AN1070/0102

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AN1070

APPLICATION NOTE

ST7 CHECKSUM SELFCHECKING CAPABILITY

by Microcontroller Division Applications

INTRODUCTION

The goal of this application note is to present a software technique for determining if data and

program in FLASH have been corrupted and if so not to run the user program.

The program described in this application note has been written for the ST72F26x family

(ST72260G1, ST72262G1, ST72262G2, ST72264G1, ST72264G2) but can be extended to all

other ST7 MCUs.

You have to choose your device at the beginning of the program (several “#include” and “#de-

fine” statements are provided for this purpose). In this application, we chose to use a

ST72264G2.

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