April 2013

DocID024207 Rev 1

1/11

AN4246

Application note

Proprietary Code Read Out Protection

on STM32L1 microcontrollers

Introduction

The protection of the intellectual property of embedded code has become a high importance issue

concerning the microcontrollers. In order to provide this protection, STM32 microcontrollers have

different means of protecting Flash code against copy and reverse engineering.

This application note describes the generic STM32 family Flash protection features. The focus is on the

Proprietary Code Read Out Protection (PCROP) which is embedded in medium-density plus

STM32L151xC, STM32L152xC, STM32L162xC and STM32L100xC microcontrollers.

Table 1 lists the microcontrollers concerned by this application note.

Table 1. Applicable products

Type

Applicable products

Microcontrollers

STM32L1 (STM32L151xC, STM32L152xC, STM32L162xC and STM32L100xC)

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