Part Number: STM32F411RET6

Manufacturer: STMicroelectronics

Description: IC MCU 32BIT 512KB FLASH 64LQFP

Shipped from: Shenzhen/HK Warehouse

Stock Available: Check with us

Technical Specifications of STM32F411RET6

Datasheet  STM32F411RET6 datasheet
Category Integrated Circuits (ICs)
Family Embedded – Microcontrollers
Manufacturer STMicroelectronics
Series STM32 F4
Packaging Tray
Part Status Active
Core Processor ARM? Cortex?-M4
Core Size 32-Bit
Speed 100MHz
Peripherals Brown-out Detect/Reset, DMA, I2S, POR, PWM, WDT
Number of I/O 50
Program Memory Size 512KB (512K x 8)
Program Memory Type FLASH
RAM Size 128K x 8
Voltage – Supply (Vcc/Vdd) 1.7 V ~ 3.6 V
Data Converters A/D 16x12b
Oscillator Type Internal
Operating Temperature -40°C ~ 85°C (TA)
Package / Case 64-LQFP
Supplier Device Package 64-LQFP (10×10)

STM32F411RET6 Introduction

We’d like to take this chance to welcome you to the STM32F411xC/E microcontroller’s definitive article for application writers. In this article, you’ll learn about all the amazing things it can do. Unlock its full potential as we study the depths of its memory and peripherals and learn their deepest, darkest secrets in this reference manual. The STM32F411xC/E makes it easy to access a wide range of memory sizes, packaging choices, and devices. This opens the door to a wide range of possible uses. Let’s go on an amazing journey together, and along the way, we won’t leave any stone unturned. Prepare to bring your ideas to life by using the full power of the STM32F411xC/E microcontroller, and good luck with that!

STM32F411RET6 Memory and bus architecture

● I-bus

BusMatrix and the instruction bus of the Cortex®-M4 with FPU core are connected via this bus, which acts as a link between the two. The memory sends commands to the core via this bus, which the core utilizes to process them. This bus is going to a memory (either internal flash memory or SRAM), which stores the program’s code.

● D-bus

When the BusMatrix is connected to the databus of the Cortex®-M4 with FPU, the databus enables the two components to interchange information with one another. The central processing unit makes use of this bus in order to connect to the debug environment and load literals. This vehicle is also used to communicate with the other buses in the area. This bus is traveling to the memory that stores code or data, which could be the internal Flash memory or the SRAM memory, depending on the device.

● S-bus

Through the use of this bus, a BusMatrix can be connected to the system bus of a Cortex®-M4 with an FPU core. This bus is utilized for reading from and writing to SRAM as well as other peripherals. In addition to the more effective ICode, these instructions can also be fetched using this bus. This bus is used by the internal SRAM1, as well as the AHB1, APB, and AHB2 peripherals. Additionally, this bus supports the AHB2 peripherals.

● DMA memory bus

The BusMatrix can communicate with the DMA memory bus master interface over this bus. The DMA employs it for transferring information to and from storage facilities. This bus moves data between the internal Flash memory, the internal SRAM, and, for S4, the AHB1/AHB2 and APB devices.

● DMA peripheral bus

This bus connects the BusMatrix to the DMA peripheral master bus interface. The DMA uses this bus to talk to AHB devices and swap memory with other memory. This bus is for the data memories (flash memory and internal SRAM) and the AHB and APB devices.

● Memory organization

All four kinds of memory (program, data, register, and input/output) share the same address space, which can hold up to 4 gigabytes. The way that bytes are kept in memory is called “little-endian.” The bit with the lowest number in a word is the one that is thought to be the least important. The most important bit is the one with the highest number. If you want a full description of how the mapping works, you should look at the parts that go with the peripheral registers. Every one of the eight main memory blocks that can be used is 512 megabytes. The word “reserved” refers to all of the memory spots on the chip that are not being used by any of the on-chip memories or peripherals at the moment.

STM32F411RET6 Embedded Flash Memory Interface

● Introduction

CPU AHB I-Codes and D-Codes interact with Flash memory via the Flash memory interface. It erases and rewrites flash memory data using read/write protection.


● HSI clock

The HSI clock signal, generated by an in-built 16 MHz RC oscillator, can be used as a system clock or PLL input. No extra components are needed for the HSI RC oscillator’s clock supply. It has a faster startup time than the HSE crystal oscillator, but its frequency is less precise even after calibration.

● LSI clock

The LSI RC is used by the IWDG and AWU as a low-power clock source when in stop and standby modes. There is a 32-kHz tick on the clock.

● System clock (SYSCLK) selection

After a system reset, the HSI oscillator becomes the system clock. Stopping a system clock that uses a clock source directly or through a PLL is impossible. If the target clock source is ready (clock stable after starting delay or PLL locked), the switch occurs. If a clock source is picked before it’s ready, the switch happens when it’s ready.

● Clock security system (CSS)

The software on the computer can turn on the security system on the clock. The clock monitor is turned on after the HSE oscillator starts, and it stays on until the oscillator is turned off. After that, the time monitor is turned off. This oscillator is turned off, a clock failure event is sent to the break inputs of the advanced-control timer TIM1, and an interrupt (clock security system interrupt CSSI) is made to tell the program about the failure. This lets the microcontroller start the process of healing. On the Cortex®-M4 processor, the CSSI is connected to the FPU non-maskable interrupt (NMI) exception vector.

● Watchdog clock

When the independent watchdog (IWDG) is activated, either by a hardware option or directly through software access, the LSI oscillator is turned on permanently and cannot be turned off. The LSI oscillator performs temporization before providing the clock to the IWDG.


In conclusion, the STM32F411xC/E microcontroller gives developers access to a vast array of capabilities and functions, allowing them to create cutting-edge software with more ease. Its memory and bus architecture are both highly efficient, which enables it to give seamless access to code, data, and peripherals. Code execution is improved because of the embedded Flash memory interface, and stable functioning of the system is ensured thanks to the clock management and the watchdog clock. With the powerful STM32F411xC/E microcontroller, developers may let their imaginations run wild and bring their ideas to life if they take advantage of these capabilities and exploit their full potential.

By utilizing the STM32F411xC/E microcontroller, you will be able to provide your thoughts with increased control over the amount of power they consume. Get in touch with ICRFQ as soon as possible to request additional information and to place an order.

4.8/5 - (397 votes)
Kevin Chen