STM3240G
ARM-based STM32 microcontroller development and evaluation boards
Manufacturer： stm
series introduction
# Introduction to the STM32F40x Series: Empowering High - Performance Embedded Applications
## 1. Overview
The STM32F40x series, part of STMicroelectronics' extensive STM32 microcontroller family, is designed to meet the demanding requirements of a wide range of embedded applications. Built on the powerful ARM® Cortex® - M4 core with floating - point unit (FPU), these microcontrollers offer a unique combination of high performance, low power consumption, and rich peripheral integration.
## 2. Core and Performance
### 2.1 ARM Cortex - M4 Core
The STM32F40x series is based on the ARM Cortex - M4 core, which features a 32 - bit RISC architecture. This core provides a high level of processing power, with a maximum operating frequency of up to 168 MHz. The presence of a single - precision floating - point unit (FPU) enables efficient handling of complex mathematical operations, making it ideal for applications such as motor control, audio processing, and sensor data analysis.
### 2.2 Instruction Set and Performance Metrics
The Cortex - M4 core supports the Thumb - 2 instruction set, which combines the code density of 16 - bit Thumb instructions with the performance of 32 - bit ARM instructions. This results in a significant reduction in code size and improved execution speed. The STM32F40x microcontrollers can achieve a maximum Dhrystone 2.1 MIPS rating of up to 210 DMIPS, providing excellent processing capabilities for real - time applications.
## 3. Memory
### 3.1 Flash Memory
The STM32F40x series offers a wide range of flash memory options, from 128 KB to 1 MB. Flash memory is used to store the program code, allowing developers to implement complex algorithms and applications. The flash memory has a high - speed access time, which helps in reducing the overall execution time of the program. Additionally, it supports in - system programming (ISP) and in - application programming (IAP), enabling easy firmware updates in the field.
### 3.2 SRAM
These microcontrollers are equipped with up to 192 KB of SRAM. SRAM is used for storing variables, data buffers, and stack space during program execution. The large SRAM size allows for the implementation of complex data - intensive applications, such as image processing and data logging.
## 4. Peripherals
### 4.1 GPIO (General - Purpose Input/Output)
The STM32F40x series provides a large number of GPIO pins, which can be configured as either input or output. These pins can be used for a variety of purposes, such as interfacing with external sensors, actuators, and other devices. The GPIO pins support features like pull - up and pull - down resistors, which can be used to ensure stable input levels.
### 4.2 Timers
There are multiple timers available in the STM32F40x series, including advanced - control timers, general - purpose timers, and basic timers. These timers can be used for a wide range of applications, such as PWM (Pulse - Width Modulation) generation for motor control, delay generation, and event counting. The advanced - control timers support features like dead - time insertion and complementary output generation, which are essential for applications such as three - phase motor control.
### 4.3 Communication Interfaces
- **USART (Universal Synchronous/Asynchronous Receiver/Transmitter)**: Multiple USART interfaces are available, which support both synchronous and asynchronous communication. They can be used for serial communication with other devices, such as sensors, displays
Images for reference
STM3240G-EVAL
STM3240G-SK
STM3240G-SK/KEI