Overview
The STM8S903K3U6 is an 8-bit microcontroller from STMicroelectronics, part of the STM8S series. This device is designed to offer a balance of performance, robustness, and cost-effectiveness. It features a 16 MHz advanced STM8 core with Harvard architecture and a 3-stage pipeline, along with an extended instruction set. The microcontroller includes 8 Kbytes of Flash program memory, 1 Kbyte of RAM, and 640 bytes of true data EEPROM, which can endure up to 300 k write/erase cycles. The STM8S903K3U6 is available in various packages, including LQFP32 and UFQFPN32, making it versatile for different application needs.
Key Specifications
| Specification | Details |
|---|---|
| Core Frequency | 16 MHz |
| Program Memory | 8 Kbytes Flash |
| RAM | 1 Kbyte |
| EEPROM | 640 bytes, 300 k write/erase cycles |
| Operating Voltage | 2.95 to 5.5 V |
| Clock Sources | Low power crystal resonator oscillator, external clock input, internal 16 MHz RC, internal low-power 128 kHz RC |
| ADC Resolution | 10-bit, ±1 LSB |
| Communication Interfaces | UART, SPI up to 8 Mbit/s, I2C up to 400 kbit/s |
| Timers | Advanced control timer, 16-bit general purpose timer, 8-bit basic timer, auto wake-up timer |
| I/Os | Up to 28 I/Os, including 21 high sink outputs |
| Package Options | LQFP32, UFQFPN32, SDIP32 |
Key Features
- Advanced Core: 16 MHz STM8 core with Harvard architecture and 3-stage pipeline, extended instruction set.
- Memory: 8 Kbytes Flash program memory, 1 Kbyte RAM, 640 bytes true data EEPROM.
- Clock Management: Flexible clock control with 4 master clock sources, clock security system with clock monitor.
- Power Management: Low-power modes (wait, active-halt, halt), switch-off peripheral clocks individually, permanently active low-consumption power-on and power-down reset.
- 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, auto wake-up timer, window watchdog and independent watchdog timers.
- Communication Interfaces: UART with clock output, SPI up to 8 Mbit/s, I2C up to 400 kbit/s.
- 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 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 STM8S903K3U6 is suitable for a variety of applications that require a balance of performance and cost-effectiveness. These include:
- Industrial Control Systems: For controlling and monitoring industrial processes, the microcontroller's robust I/Os and advanced timers are particularly useful.
- Automotive Systems: The device's ability to operate in a wide voltage range and its low-power modes make it suitable for automotive applications.
- Consumer Electronics: It can be used in various consumer electronics devices that require efficient processing and low power consumption.
- Medical Devices: The microcontroller's precision and reliability make it a good choice for medical device applications.
- IoT Devices: Its communication interfaces (UART, SPI, I2C) and low power consumption make it ideal for Internet of Things (IoT) applications.
Q & A
- What is the core frequency of the STM8S903K3U6?
The core frequency of the STM8S903K3U6 is 16 MHz.
- How much program memory does the STM8S903K3U6 have?
The STM8S903K3U6 has 8 Kbytes of Flash program memory.
- What is the operating voltage range of the STM8S903K3U6?
The operating voltage range is from 2.95 to 5.5 V.
- What types of timers are available on the STM8S903K3U6?
The device includes an advanced control timer, a 16-bit general purpose timer, an 8-bit basic timer, and an auto wake-up timer, along with window and independent watchdog timers.
- What communication interfaces are supported by the STM8S903K3U6?
The microcontroller supports UART, SPI up to 8 Mbit/s, and I2C up to 400 kbit/s.
- How many I/Os does the STM8S903K3U6 have?
The device has up to 28 I/Os, including 21 high sink outputs.
- What is the resolution of the ADC on the STM8S903K3U6?
The ADC resolution is 10-bit, ±1 LSB.
- Does the STM8S903K3U6 have any power-saving features?
Yes, it has low-power modes (wait, active-halt, halt) and the ability to switch off peripheral clocks individually.
- What is the endurance of the EEPROM on the STM8S903K3U6?
The EEPROM can endure up to 300 k write/erase cycles.
- Is the STM8S903K3U6 RoHS compliant?
Yes, the STM8S903K3U6 is RoHS compliant with an Ecopack2 grade.
