8-bit microcontroller with 128KB Flash, 3.3V/5V, 48-pin LQFP package
Manufacturer： stm
# Introduction to the STM8AF51A8TCY Product Series
## 1. Overview
The STM8AF51A8TCY is part of STMicroelectronics' STM8 microcontroller family, specifically designed to meet the diverse needs of automotive and industrial applications. This product series combines high - performance, reliability, and cost - effectiveness, making it an ideal choice for a wide range of embedded systems.
## 2. Key Features
### 2.1 Core and Architecture
- **STM8 Core**: The STM8AF51A8TCY is based on the STM8 core, which offers a high - performance 8 - bit architecture. It has a Harvard architecture with separate program and data buses, enabling efficient instruction fetch and data access simultaneously. This results in faster execution of code and improved overall system performance.
- **Instruction Set**: The core supports a rich set of instructions, including arithmetic, logical, and bit - manipulation operations. This allows developers to write efficient and compact code for various applications, from simple control tasks to more complex algorithms.
### 2.2 Memory
- **Flash Memory**: It is equipped with 64 KB of in - system programmable Flash memory. This non - volatile memory is used to store the application code. The Flash memory has a high endurance, allowing for multiple programming and erasing cycles, which is crucial for applications that require software updates over the product's lifetime.
- **Data EEPROM**: The microcontroller also features 2 KB of Data EEPROM. This memory is used to store non - volatile data such as calibration parameters, configuration settings, and user - specific data. The EEPROM has a high write endurance and can be accessed independently of the Flash memory.
- **RAM**: There is 2 KB of Random Access Memory (RAM) available for storing variables and intermediate data during program execution. The sufficient amount of RAM allows for the implementation of more complex algorithms and data - handling tasks.
### 2.3 Peripherals
#### 2.3.1 Timers
- **General - Purpose Timers**: The STM8AF51A8TCY includes multiple general - purpose timers. These timers can be used for a variety of functions such as generating accurate time delays, pulse width modulation (PWM) for motor control, and measuring input signal frequencies.
- **Watchdog Timer**: A built - in watchdog timer provides a safety mechanism to ensure the proper operation of the microcontroller. If the software fails to reset the watchdog timer within a specified time interval, the microcontroller will be reset, preventing the system from entering an unpredictable state.
#### 2.3.2 Communication Interfaces
- **UART (Universal Asynchronous Receiver - Transmitter)**: The UART interface allows for asynchronous serial communication with other devices such as sensors, displays, or other microcontrollers. It supports various baud rates and can be configured for different data formats, making it a versatile communication option.
- **SPI (Serial Peripheral Interface)**: The SPI interface provides a high - speed synchronous serial communication protocol. It is commonly used for communicating with external devices such as flash memories, ADCs (Analog - to - Digital Converters), and DACs (Digital - to - Analog Converters).
- **I²C (Inter - Integrated Circuit)**: The I²C interface is a multi - master, multi - slave serial communication protocol. It is widely used for connecting low - speed devices such as sensors, EEPROMs, and real - time clocks.
#### 2.3.3 Analog - to - Digital Converter (ADC)
- The microcontroller features a 10 - bit ADC with multiple input channels. This ADC can be used to convert analog signals from sensors such as temperature sensors, pressure sensors, and light sensors into