AN2606 datasheet(85/155 Pages) STMICROELECTRONICS

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AN2606

STM32F42xxx/43xxx devices bootloader

154

18.2.3

Bootloader version

The following table lists the STM32F42xxx/43xxx devices bootloader V9.x versions.

Table 41. STM32F42xxx/43xxx bootloader V9.x versions

Bootloader

version

number

Description

Known limitations

V9.0

This bootloader is an updated

version of Bootloader v7.0.

This new version of bootloader

supports I2C2, I2C3, SPI1, SPI2

and SPI4 interfaces.

The RAM used by this bootloader

is increased from 8Kb to 12Kb.

The ID of this bootloader is 0x90

The connection time is increased.

None

V9.1

This bootloader is an updated

version of Bootloader v9.0. This

new version implements the new

I2C No-stretch commands (I2C

protocol v1.1) and the capability

of disabling PcROP when RDP1

is enabled with

ReadOutUnprotect command for

all protocols(USB, USART, CAN,

I2C and SPI). The ID of this

bootloader is 0x91

For the CAN interface, the Write Unprotect

command is not functional. Instead you can use

Write Memory command and write directly to the

option bytes in order to disable the write

protection.

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