AN1502/0202

1/7

AN1502

APPLICATION NOTE

EMULATED DATA EEPROM WITH ST7 HDFLASH MEMORY

by Microcontroller Division Applications

INTRODUCTION

When the data EEPROM is not available in a ST7 device, it can be emulated by the HDFlash

memory with some restrictions. This Application Note describes how to emulate this feature

with a ST72F521 device and the restrictions this emulation implies.

Data EEPROM can be emulated in all HDFlash devices.

AS HDFlash is a dual voltage FLASH memory, the 12-volt programming voltage must be

provided on the application board (a pull-down on ICPSEL on the application board is

advised).

For more information concerning ST7 programming, a .zip file is included with the complete

1