Overview
The STM8S903F3P6 is an 8-bit microcontroller from STMicroelectronics, part of the STM8S access line. This microcontroller is designed to offer a balance of performance, robustness, and reduced system cost. It features a 16 MHz advanced STM8 core with Harvard architecture and a 3-stage pipeline, along with an extended instruction set. The device includes 8 Kbyte of Flash program memory, 640 bytes of true data EEPROM, and 1 Kbyte of RAM. The integrated peripherals and robust I/O design make it suitable for a variety of applications requiring low power consumption and high reliability.
Key Specifications
| Specification | Details |
|---|---|
| Core Frequency | 16 MHz |
| Program Memory | 8 Kbyte Flash; data retention 20 years at 55 °C after 10 kcycle |
| Data Memory | 640 byte true data EEPROM; endurance 300 kcycle |
| RAM | 1 Kbyte |
| Operating Voltage | 2.95 to 5.5 V |
| Clock Sources | Low-power crystal resonator oscillator, external clock input, internal user-trimmable 16 MHz RC, internal low-power 128 kHz RC |
| Timers | Advanced control timer (16-bit, 4 CAPCOM channels), 16-bit general purpose timer, 8-bit basic timer, auto wake-up timer, window and independent watchdog timers |
| Communication Interfaces | UART with clock output, SPI up to 8 Mbit/s, I²C up to 400 kbit/s |
| Analog to Digital Converter (ADC) | 10-bit, ±1 LSB ADC with up to 7 multiplexed channels + 1 internal channel, scan mode and analog watchdog |
| I/Os | Up to 28 I/Os on a 32-pin package including 21 high sink outputs |
| Package | TSSOP20, UFQFPN20, SO20, LQFP32, SDIP32 |
Key Features
- Advanced 16 MHz STM8 core with Harvard architecture and 3-stage pipeline
- Extended instruction set for enhanced performance
- Flexible clock control with four master clock sources
- Low-power modes (wait, active-halt, halt) and switch-off peripheral clocks individually
- Nested interrupt controller with 32 interrupts and up to 28 external interrupts on 7 vectors
- Robust I/O design immune against current injection
- Integrated true data EEPROM for up to 300 k write/erase cycles
- 10-bit ADC with up to 7 multiplexed channels and internal reference voltage measurement
- UART, SPI, and I²C communication interfaces
- 96-bit unique key for each device
Applications
The STM8S903F3P6 microcontroller is suitable for a wide range of applications that require low power consumption, high reliability, and robust performance. These include:
- Industrial control systems
- Automotive systems
- Consumer electronics
- Medical devices
- Smart home devices
- IoT applications
Q & A
- What is the core frequency of the STM8S903F3P6 microcontroller?
The core frequency is 16 MHz. - How much program memory does the STM8S903F3P6 have?
The device has 8 Kbyte of Flash program memory. - What is the endurance of the data EEPROM in the STM8S903F3P6?
The data EEPROM has an endurance of 300 k write/erase cycles. - What are the operating voltage ranges for the STM8S903F3P6?
The operating voltage ranges from 2.95 to 5.5 V. - What communication interfaces are available on the STM8S903F3P6?
The device includes UART, SPI, and I²C communication interfaces. - How many I/Os are available on the STM8S903F3P6?
Up to 28 I/Os are available on a 32-pin package, including 21 high sink outputs. - Does the STM8S903F3P6 support low-power modes?
Yes, it supports low-power modes such as wait, active-halt, and halt. - What types of timers are available on the STM8S903F3P6?
The device includes an advanced control timer, a 16-bit general purpose timer, an 8-bit basic timer, an auto wake-up timer, and window and independent watchdog timers. - Is the STM8S903F3P6 robust against current injection?
Yes, the I/O design is highly robust and immune against current injection. - Does the STM8S903F3P6 have a unique identifier?
Yes, each device has a 96-bit unique key.
