Selecting between rom, fastrom and flash for a microcontroller

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 several 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 second group of families. For information on the first group, refer to Application Note AN886.