AN1474/1001

1/10

AN1474

APPLICATION NOTE

ST92F150 AND ST92F120 PROBLEM RESOLUTION

GUIDELINES

by Microcontroller Division Applications

INTRODUCTION

The ST92F120 and ST92F150 are part of the same family of powerful microcontrollers from

STMicroelectronics, featuring single voltage flash memory and an innovative E3prom concept.

This document gives guidelines on resolving several common application problems that have

been reported by ST Application Engineers.

Testflash features

The testflash features are described in the ST92F120 and ST92F150 datasheets.

Located in a reserved flash area, the TestFlash contains the bootcode which performs the

E3prom initialization, provides the possibility to program the flash by In System Programming

(refer to the application note

AN1450 ST9 Flash Programming for a detailed description) and

then jumps to the start address application code via the reset vector.

1