Overview
The STM8S903K3U3TR is an 8-bit microcontroller from STMicroelectronics, part of the STM8S access line family. 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 |
| Program Memory | 8 Kbyte Flash |
| Data Memory | 640 byte true data EEPROM, 1 Kbyte RAM |
| 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 |
| 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 with 8-bit prescaler |
| Communication Interfaces | UART, SPI up to 8 Mbit/s, I2C up to 400 kbit/s |
| ADC | 10-bit, ±1 LSB ADC with up to 7 multiplexed channels + 1 internal channel |
| I/Os | Up to 28 I/Os on a 32-pin package including 21 high sink outputs |
| Package | UFQFPN 32 5x5x0.55 mm |
| RoHS Compliance | Ecopack2 |
Key Features
- Core: 16 MHz advanced STM8 core with Harvard architecture and 3-stage pipeline, extended instruction set.
- Memories: 8 Kbyte Flash program memory, 640 byte true data EEPROM, 1 Kbyte RAM.
- Clock and Supply Management: Flexible clock control with 4 master clock sources, low-power modes (wait, active-halt, halt), switch-off peripheral clocks individually.
- Interrupt Management: Nested interrupt controller with 32 interrupts, up to 28 external interrupts on 7 vectors.
- Timers: Advanced control timer, 16-bit general purpose timer, 8-bit basic timer with 8-bit prescaler, auto wake-up timer, window watchdog and independent watchdog timers.
- Communication Interfaces: UART with clock output for synchronous operation, SPI interface up to 8 Mbit/s, I2C interface up to 400 kbit/s.
- 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, highly robust I/O design immune against current injection.
- Unique ID: 96-bit unique key for each device.
Applications
The STM8S903K3U3TR 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 STM8S903K3U3TR?
The core frequency is 16 MHz.
- How much program memory does the STM8S903K3U3TR have?
The device has 8 Kbyte of Flash program memory.
- What types of timers are available on the STM8S903K3U3TR?
The device includes an advanced control timer, a 16-bit general purpose timer, and an 8-bit basic timer with an 8-bit prescaler.
- What communication interfaces are supported by the STM8S903K3U3TR?
The device supports UART, SPI up to 8 Mbit/s, and I2C up to 400 kbit/s.
- What is the operating voltage range of the STM8S903K3U3TR?
The operating voltage range is 2.95 to 5.5 V.
- How many I/Os are available on the STM8S903K3U3TR?
Up to 28 I/Os are available on a 32-pin package, including 21 high sink outputs.
- Does the STM8S903K3U3TR have any power management features?
Yes, it includes low-power modes (wait, active-halt, halt) and the ability to switch off peripheral clocks individually.
- What type of ADC is integrated into the STM8S903K3U3TR?
The device has a 10-bit, ±1 LSB ADC with up to 7 multiplexed channels + 1 internal channel.
- Is the STM8S903K3U3TR RoHS compliant?
Yes, it is RoHS compliant with an Ecopack2 grade.
- What is the package type of the STM8S903K3U3TR?
The package type is UFQFPN 32 5x5x0.55 mm.
