Overview
The STM8S903K3U3 is a member of the STM8S access line 8-bit microcontrollers from STMicroelectronics. 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
| Parameter | Specification |
|---|---|
| Core Frequency | 16 MHz |
| Core Architecture | Harvard architecture with 3-stage pipeline |
| 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 |
| Power Management | Low-power modes (wait, active-halt, halt), switch-off peripheral clocks individually, permanently active low-consumption power-on and power-down reset |
| Interrupts | Nested interrupt controller with 32 interrupts, up to 28 external interrupts on 7 vectors |
| 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 | UFQFPN32 5x5x0.55 mm |
Key Features
- Advanced Core: 16 MHz STM8 core with Harvard architecture and 3-stage pipeline, extended instruction set.
- Memories: 8 Kbyte Flash program memory, 640 bytes true data EEPROM, 1 Kbyte RAM.
- Clock and Power Management: Flexible clock control with 4 master clock sources, low-power modes, and clock security system.
- Interrupt Management: Nested interrupt controller with 32 interrupts, up to 28 external interrupts on 7 vectors.
- Timers: Advanced control timer, general purpose timer, 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 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, highly robust I/O design immune against current injection.
- Unique ID: 96-bit unique key for each device.
Applications
The STM8S903K3U3 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 devices
Q & A
- What is the core frequency of the STM8S903K3U3 microcontroller?
The core frequency is 16 MHz.
- What types of memory does the STM8S903K3U3 have?
The device has 8 Kbyte Flash program memory, 640 bytes true data EEPROM, and 1 Kbyte RAM.
- What are the operating voltage ranges for the STM8S903K3U3?
The operating voltage ranges from 2.95 to 5.5 V.
- What communication interfaces are available on the STM8S903K3U3?
The device includes UART, SPI up to 8 Mbit/s, and I²C up to 400 kbit/s interfaces.
- Does the STM8S903K3U3 have any power management features?
Yes, it includes low-power modes (wait, active-halt, halt), switch-off peripheral clocks individually, and permanently active low-consumption power-on and power-down reset.
- What is the resolution of the ADC on the STM8S903K3U3?
The ADC is 10-bit with ±1 LSB accuracy.
- How many I/Os are available on the STM8S903K3U3?
Up to 28 I/Os are available on a 32-pin package, including 21 high sink outputs.
- Is the STM8S903K3U3 RoHS compliant?
Yes, the STM8S903K3U3 is RoHS compliant.
- What development tools are available for the STM8S903K3U3?
A wide range of development tools, including emulation and in-circuit debugging tools, are available.
- What is the package type of the STM8S903K3U3?
The package type is UFQFPN32 5x5x0.55 mm.
