PM0075

Overview

Doc ID 17863 Rev 2

9/31

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 STM32F10xxx microcontroller type. For the base address, please

refer to the related STM32F10xxx 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.

In connectivity line devices the boot loader can be activated through one of the

following interfaces: USART1, USART2 (remapped), CAN2 (remapped) or USB OTG

FS in Device mode (DFU: device firmware upgrade). The USART peripheral operates

with the internal 8 MHz oscillator (HSI). The CAN and USB OTG FS, however, can only

function if an external 8 MHz, 14.7456 MHz or 25 MHz clock (HSE) is present. For

further details, please refer to AN2662 (“STM32F105xx and STM32F107xx system

memory boot mode”) available from www.st.com.

●

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.

Table 5.

Flash module organization (connectivity 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 127

0x0803 F800 - 0x0803 FFFF

2 Kbytes

Information block

System memory

0x1FFF B000 - 0x1FFF F7FF

18 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