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Visitor II
December 16, 2025
Solved

ReadMemory Uart STM32F4xx

  • December 16, 2025
  • 1 reply
  • 304 views

Hello, i am stuck on UART topic and i have an argument with someone.

He states that ReadMemory(0x11) is sent by STM32. Is that really so? Does STM32 at any point sends "0x11" as response? I must be missing something...

Best answer by TDK

The UART bootloader protocol is given in AN3155.

USART protocol used in the STM32 bootloader - Application note

 

The chip will reply to whatever command it is sent.

In the read memory command, the STM32 does not echo back the command (0x11). It just ACKs (or NACKs)

TDK_0-1765918025176.png

 

1 reply

TDK
TDKBest answer
Super User
December 16, 2025

The UART bootloader protocol is given in AN3155.

USART protocol used in the STM32 bootloader - Application note

 

The chip will reply to whatever command it is sent.

In the read memory command, the STM32 does not echo back the command (0x11). It just ACKs (or NACKs)

TDK_0-1765918025176.png

 

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