AN886/0903

1/9

Rev. 1.0

AN886

APPLICATION NOTE

SELECTING BETWEEN ROM, FASTROM AND OTP

FOR A MICROCONTROLLER

by Microcontroller Division Applications

INTRODUCTION

A customer who develops an MCU-based application needs various levels of flexibility in order

to perform code modifications at different times in the life cycle of the product (these levels are

explained on the next page). To satisfy these requirements, STMicroelectronics supports sev-

eral device types within two main groups of microcontroller product families:

– EPROM, OTP, FASTROM and ROM microcontroller families

– Flash, FASTROM and ROM microcontroller families

This Application Note discusses the first group of families. For information on the second

group, refer to Application Note AN1068.

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