The STM8S003F3P6 is a member of STMicroelectronics' STM8S Value Line microcontroller family. It features a compact 20-pin package and integrates essential peripherals, making it ideal for a range of embedded control tasks. This chip includes built-in Flash memory, EEPROM, and RAM, along with support for the SWIM (Single Wire Interface Module) for debugging and programming.
The STM8S003F3P6 operates based on its internal 8-bit STM8 core architecture, primarily functioning by acquiring, processing, and outputting data to perform various control tasks. It integrates up to 8KB of Flash memory, 1KB of SRAM, and 128 bytes of EEPROM, which support program storage, temporary data buffering, and long-term data retention. Additionally, the chip offers a wide range of peripheral interfaces such as timers, ADCs, and serial communication modules (UART, I2C, SPI), allowing seamless interaction with sensors, actuators, and other control components.
During operation, the STM8S003F3P6 is driven by a main clock, supporting frequencies up to 16 MHz. When it receives external input signals—whether analog voltages, currents, or digital signals, it can respond using an interrupt mechanism. Based on the predefined program logic, it processes the data and outputs control signals via GPIOs, PWM, or serial interfaces. This enables actions like motor control, data communication, and system monitoring. The overall design focuses on low power consumption and efficient performance, making it ideal for embedded control applications.
| Parameter | Specification |
| Core | STM8 8-bit |
| Operating Frequency | 16MHz |
| Program Memory Type | FLASH |
| Number of I/O | 16 |
| Flash Memory | 8 KB |
| SRAM | 1 KB |
| EEPROM Size | 128 x 8 |
| Operating Voltage | 2.95V ~ 5.5V |
| I/O Pins | 16 GPIO |
| Data Converters | A/D 5x10b |
| ADC | 10-bit, 5 channels |
| Communication Interfaces | UART, SPI, I²C |
| Package Type | 20-TSSOP |
| Temperature Range | -40°C ~ 85°C |
16 MHz advanced STM8 core with Harvard
endurance up to 100 k write/erase cycles
Flexible clock control
Low-power crystal resonator oscillator
External clock input
Clock security system with clock monitor
Low-power modes (wait, active-halt, halt)
Switch-off peripheral clocks individually
Permanently active, low-consumption
Nested interrupt controller with 32 interrupts
Up to 27 external interrupts on 6 vectors
8-bit basic timer with 8-bit prescaler
Auto wakeup timer
Communications interfaces
UART with clock output for synchronous operation, SmartCard, IrDA, LIN master mode
2C interface up to 400 Kbit/s
Highly robust I/O design, immune against current injection
Embedded single-wire interface module
Consumer Electronics
Industrial Control
Smart Lighting
Battery-Powered Devices
Automotive Electronics (Non-Critical)
Security Systems
This functional block diagram of the STM8S003F3P6 microcontroller shows how its internal modules are connected. At the core is the STM8S CPU, which runs the program and controls other parts. It links to various components through a central bus. At the top, you’ll find the clock controller (with both internal and external sources) and the reset circuit that handles startup and system resets.
The modules on the left side focus on communication and input:
- I2C, SPI, and UART1: Provide interfaces for data communication with external devices.
- ADC1: Used for analog signal acquisition, such as reading temperature or voltage levels.
- Beeper and LIN master SPI emulation: Enable features like buzzer control or simulation of specific communication protocols.
The right side mainly contains control and memory components:
- Flash, EEPROM, and RAM: Serve for program storage, parameter saving, and temporary data processing.
- Timers (TIM1, TIM2, TIM4, etc.): Used for timing control, PWM output, and event counting.
- Watchdog timers (WDG): Ensure system reliability by resetting the system in case of software malfunctions.
- AWU (Auto Wake-Up unit): Allows the MCU to wake up periodically from low-power modes.
In summary, the STM8S003F3P6 is a well-rounded microcontroller suited for compact embedded applications. With essential capabilities in communication, control, signal acquisition, and memory storage, it is ideal for use in home appliance control, battery management, and small electronic devices.
Datasheet PDF(https://dir.heisener.com/DatasheetDownload/STM8S003K3T6CTR.pdf)
The STM8S003F3P6 uses a 20-pin TSSOP (Thin Shrink Small Outline Package), which offers advantages such as compact size, fine pin pitch, and good thermal performance. This type of package is well-suited for space-constrained applications. The TSSOP format also supports efficient automated surface-mount production and helps reduce EMI interference, contributing to improved system stability.
STMicroelectronics is a global semiconductor company headquartered in Switzerland, known for delivering innovative and energy-efficient solutions across a wide range of electronics applications. The company designs and manufactures a broad portfolio of products, including microcontrollers, sensors, power management ICs, and analog devices.
The STM8S003F3P6 is an 8-bit microcontroller from STMicroelectronics, based on the STM8 core, offering 8 KB Flash memory, 1 KB RAM, and 128 bytes of EEPROM in a 20-pin TSSOP package.
It comes in a compact 20-pin TSSOP package, ideal for space-constrained PCB layouts and automated SMD assembly.
Yes. It supports multiple low-power modes (Wait, Halt, Active-halt), making it efficient for battery-powered and energy-sensitive designs.
STM8S003F3P6 is supported by the STM8 toolchain including STVD IDE, STVP programmer, and ST-Link debugger/programmer. Third-party tools like Cosmic C compiler are also compatible.
