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STM32F105xx/107xx devices bootloader

AN2606

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DocID13801 Rev 21

5.3

Bootloader version

The following table lists the STM32F105xx/107xx devices bootloader versions:

Table 9. STM32F105xx/107xx bootloader versions

5.3.1

How to identify STM32F105xx/107xx bootloader versions

Bootloader V1.0 is implemented on devices which date code is below 937 (refer to

STM32F105xx and STM32F107xx datasheet for where to find the date code on the device

marking). Bootloader V2.0 and V2.1 are implemented on devices with a date code higher or

equal to 937.

There are two ways to distinguish between bootloader versions:

•

When using the USART bootloader, the Get-Version command defined in AN2606 and

AN3155 has been corrected in V2.1 version. It returns 0x22 instead of 0x20 as in

bootloader V2.0.

Bootloader version

number

Description

V1.0

Initial bootloader version

V2.0

– Bootloader detection mechanism updated to fix the issue when GPIOs of

unused peripherals in this bootloader are connected to low level or left

floating during the detection phase.

For more details please refer to Section 5.3.2.

– Vector table set to 0x1FFF B000 instead of 0x0000 0000

– Go command updated (for all bootloaders): USART1, USART2, CAN2,

GPIOA, GPIOB, GPIOD and SysTick peripheral registers are set to their

default reset values

– DFU bootloader: USB pending interrupt cleared before executing the Leave

DFU command

– DFU subprotocol version changed from V1.0 to V1.2

– Bootloader version updated to V2.0

V2.1

– Fixed PA9 excessive consumption described in Section 5.3.4.

– Get-Version command (defined in AN3155) corrected. It returns 0x22

instead of 0x20 in bootloader V2.0. Refer to Section 5.3.3 for more details.

– Bootloader version updated to V2.1

V2.2

– Fixed DFU option bytes descriptor (set to ‘e’ instead of ‘g’ because it is

read/write and not erasable).

– Fixed DFU polling timings for Flash Read/Write/Erase operations.

– Robustness enhancements for DFU bootloader interface.

– Updated bootloader version to V2.2.

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