Remove the Protection of stm32 Microcontroller

STM32 microcontroller

What does STM32 Means?

STM32, literally, ST is STMicroelectronics, M is the abbreviation of microcontroller, and 32 means 32 bits. Therefore, STM32 refers to the 32-bit microcontroller developed by ST. As the leader among the current 32-bit controllers, STM32 has the characteristics of high cost performance and powerful functions, and has become the first choice for most embedded engineers.

Remove Protection of STM32 Microcontroller

In the case of an STM32 microcontroller, the write protection can be removed by using the STM32 STLink Utility. This utility allows the user to disable the write protection, enabling them to write and erase operations. Additionally, it is possible to utilize the CubeMX graphical interface to create BEGIN and END guards that will protect the user code. If one needs to make changes to the user code, the guards can be removed to allow the changes to be applied.

STM32 ST-LINK Utility
STM32 ST-LINK Utility

Feature Introduction

The STM32 microcontroller is based on the ARM Cortex-M0 architecture and offers a range of features including an inexpensive starting point for those coming from the 8- and 16-bit microcontroller world, flexible pinouts, dynamic content changing capabilities, and several versions of the powerful STM32F4.

  • Ultra low power with dynamic power scaling;
  • Advanced and ultra-low power motor control;
  • High performance with extensive peripheral set;
  • Audio and Timers for enhanced experience;
  • Security and safety with extensive options;
  • Flexible static memory controller;
  • Advanced and low-power STM32L4+ with AES-256 encryption;
  • Timers, ADCs, DACs, PWM and communication peripherals;
  • Rich set of software tools and libraries.

Performance Parameter

  • 32-bit ARM Cortex-M3 processor core;
  • Up to 256KB of Flash memory;
  • Up to 32KB of SRAM;
  • Up to 84MHz CPU clock frequency;
  • High precision 12-bit ADC;
  • Up to two I2C, three SPI and two USART peripherals;
  • Multiple timers, RTC, and independent watchdogs;
  • Up to 4 serial synchronous/asynchronous digital audio interfaces;
  • Up to 85 general-purpose I/O pins;
  • Temperature sensor, LCD driver, and USB 2.0 full-speed device;

Supported STM32 chip models

Below are our available STM32 chips model for decryption: 


STM32 microcontrollers are used in a variety of applications, from simple printers to complex circuit boards in vehicles. It is used in less power consuming hand-held electronic devices, different types of robots, and automation systems. Main communication protocols used are UART, LIN, USART, I2C, SPI, USB, Ethernet, I2S, DSP, SAI, CAN, and IrDA. The STM32 series is based on the ARM Cortex-M3 core, specially designed for embedded applications that require high performance and low cost.

About Well Done

Well Done Technology was established in 2008, focus on PCB reverse engineering, PCB assembly, PCB design and manufacturing. Our technical team of more than 20 people includes senior engineers with rich experience.


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