STM8AL31E8ATCY

Program Memory Size:	64KB (64K x 8)
Supplier Device Package:	80-LQFP (14x14)
Package / Case:	80-LQFP
Operating Temperature:	-40°C ~ 85°C (TA)
Oscillator Type:	Internal
Data Converters:	A/D 28x12b, D/A 2x12b
Voltage - Supply (Vcc/Vdd):	1.65 V ~ 3.6 V
RAM Size:	4K x 8
EEPROM Size:	2K x 8
Program Memory Type:	FLASH
Series:	Automotive, AEC-Q100, STM8A
Number of I/O:	68
Peripherals:	Brown-out Detect/Reset, DMA, POR, PWM, WDT
Connectivity:	I²C, IrDA, LINbus, SPI, UART/USART
Speed:	16MHz
Core Size:	8-Bit
Core Processor:	STM8
Part Status:	Active
Packaging:	Tray

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Introduction

The STM8AL31E8ATCY is a low power 8-bit microcontroller manufactured by STMicroelectronics that offers a wide range of solutions to meet the most demanding embedded applications. This particular model features an 8-bit Flash memory and a 2kB RAM as well as a range of peripherals such as USART, I2C, and SPI. The microcontroller has a supply voltage range of 2.4V to 3.6V and a clock frequency range of 8MHz up to 24MHz, making it suitable for low power applications. In addition to this, the device is RoHS compliant and lead-free, making it even more suitable for use in medical and consumer applications.

Application Fields

The STM8AL31E8ATCY microcontroller is a versatile and cost-effective solution that can be used in a variety of applications, including consumer, automotive, consumer electronics, home appliances, industrial, and medical applications. In consumer electronics, the microcontroller can be used to control functions in audio-video systems, digital camera systems, and consumer health care products. In the automobile industry, the microcontroller can be used to control various safety features, such as traction control, cruise control, and park-assist systems. Additionally, the microcontroller can be used in a variety of home appliances, such as washing machines, vacuum cleaners, and air conditioners. In the industrial automation industry, the microcontroller can be used for motor control, as well as reliable and safe communication functionality. The microcontroller is also suitable for medical applications, such as portable medical diagnostics, due to its low power consumption and high reliability.

Features

The STM8AL31E8ATCY microcontroller is packaged in a wide range of packages, including DIP, QFN, and WLCSP. In addition to this, the device features an ADC module that can support up to 12-bit resolution and a Watchdog Timer module for safety and reliability. The device also features three timers with Count Up, Count Down, and Pulse Width Modulation (PWM) capabilities. Additionally, the microcontroller features a Sleep Mode and Stop Mode that allow for power savings. Furthermore, the microcontroller features an in-system programming (ISP) capability that makes it easy to write and download the program code.

Working Principle

The STM8AL31E8ATCY microcontroller operates on the Von Neumann architecture, where the memory acts both as program memory and data memory. In short, the Von Neumann architecture consists of a single memory unit, where the same address is used for both the instruction and data fetches. The microcontroller uses an register-oriented memory architecture, meaning data is stored in memory locations called registers. The instruction pointer, or program counter, points to the next instruction to be fetched. Once the instruction is fetched, the instruction is decoded and executed, followed by fetching the next instruction and repeating the process.

In addition to this, the STM8AL31E8ATCY microcontroller features an interrupt controller. This controller is used to detect interrupts from various internal and external sources and temporarily halt the execution of the current program. It can detect interrupts from external sources, such as I/O port pins, or from internal sources, such as the timer or ADC module. The interrupt controller can also prioritize incoming interrupts and route them to the appropriate service routine.

The microcontroller also features a bus interface unit that enables the microcontroller to access external memories. This unit allows the microcontroller to access Code Memory (Flash, ROM), Data Memory (RAM, EEPROM), and peripherals. The bus interface unit is also responsible for receiving and transmitting data between different components and managing address and data lines.

In addition to the features previously mentioned, the STM8AL31E8ATCY microcontroller also features a power-on reset (POR) circuit. This circuit ensures that the microcontroller is reset when power is applied. After the POR circuit is activated, the microcontroller can start executing user code.

Conclusion

The STM8AL31E8ATCY microcontroller is a powerful, low-power 8-bit microcontroller suitable for a wide range of embedded applications. The device features a wide range of peripherals, low power consumption, and reliable operation, making it an ideal solution for a variety of applications. The device operates on the Von Neumann architecture and features an interrupt controller, bus interface unit, and power-on reset circuit, allowing the device to function reliably and efficiently. With its low cost, low power consumption, and wide range of features, the STM8AL31E8ATCY microcontroller is an attractive solution for embedded applications.

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