PM0063

Overview

Doc ID 16211 Rev 2

9/30

The Flash memory is organized as 32-bit wide memory cells that can be used for storing

both code and data constants. The Flash module is located at a specific base address in the

memory map of each STM32F100xx microcontroller type. For the base address, please

refer to the related STM32F100xx reference manual.

The information block is divided into two parts:

●

System memory is used to boot the device in System memory boot mode. The area is

reserved for use by STMicroelectronics and contains the boot loader which is used to

reprogram the Flash memory using the USART1 serial interface. It is programmed by

ST when the device is manufactured, and protected against spurious write/erase

operations. For further details please refer to AN2606.

●

Option bytes

Write operations to the main memory block and the option bytes are managed by an

embedded Flash Program/Erase Controller (FPEC). The high voltage needed for

Program/Erase operations is internally generated.

The main Flash memory can be protected against different types of unwanted access

(read/write/erase). There are two types of protection:

●

Page Write Protection

●

Read Protection

Refer to Section 2.4 on page 17 for more details.

Table 3.

Flash module organization (high-density value line devices)

Block

Name

Base addresses

Size (bytes)

Main memory

Page 0

0x0800 0000 - 0x0800 07FF

2 Kbytes

Page 1

0x0800 0800 - 0x0800 0FFF

2 Kbytes

Page 2

0x0800 1000 - 0x0800 17FF

2 Kbytes

Page 3

0x0800 1800 - 0x0800 1FFF

2 Kbytes

.

.

.

.

.

.

.

.

.

Page 255

0x0807 F800 - 0x0807 FFFF

2 Kbytes

Information block

System memory

0x1FFF F000 - 0x1FFF F7FF

2 Kbytes

Option Bytes

0x1FFF F800 - 0x1FFF F80F

16

Flash memory

interface

registers

FLASH_ACR

0x4002 2000 - 0x4002 2003

4

FLASH_KEYR

0x4002 2004 - 0x4002 2007

4

FLASH_OPTKEYR

0x4002 2008 - 0x4002 200B

4

FLASH_SR

0x4002 200C - 0x4002 200F

4

FLASH_CR

0x4002 2010 - 0x4002 2013

4

FLASH_AR

0x4002 2014 - 0x4002 2017

4

Reserved

0x4002 2018 - 0x4002 201B

4

FLASH_OBR

0x4002 201C - 0x4002 201F

4

FLASH_WRPR

0x4002 2020 - 0x4002 2023

4