STM8S105K6T6C ST Mainstream Access Line 8-bit MCU 32KB Flash 16MHz CPU 10-bit ADC 1KB EEPROM LQFP-32

STM8S105K6T6C Product Overview

The STM8S105K6T6C is a mainstream access line 8-bit MCU from STMicroelectronics, classified as a medium-density device in the STM8S family reference manual (RM0016). Featuring a 16 MHz advanced STM8 core with Harvard architecture and 3-stage pipeline, it delivers up to 20 MIPS processing capability. It integrates 32 KB Flash program memory, 2 KB RAM, and 1 KB true data EEPROM (endurance: 300k write/erase cycles — 3x the typical industry standard). On-chip peripherals include a 10-bit ADC (7 channels with scan mode and analog watchdog), 16-bit advanced control timer (4 CAPCOM channels, 3 complementary outputs with dead-time insertion), two 16-bit general-purpose timers (total 5 CAPCOM channels), 8-bit basic timer, auto wakeup timer, window and independent watchdog timers, and UART (with clock output for synchronous operation, SmartCard, IrDA, LIN master mode), SPI (up to 8 Mbit/s), and I2C (up to 400 Kbit/s) interfaces. Packaged in LQFP-32 (7×7×1.4 mm) with 25 I/Os and highly robust I/O design immune against current injection, it operates from 2.95 V to 5.5 V over -40 °C to 85 °C. Ideal for industrial control, sensor modules, consumer electronics, automotive applications, and cost-sensitive embedded solutions.

STM8S105K6T6C Core Features

Advanced Core: 16 MHz STM8 core, Harvard architecture, 3-stage pipeline, extended instruction set, up to 20 MIPS, up to 37 external interrupts, 32 nested interrupts Memory: 32 KB Flash (20-year data retention at 55 °C after 10k cycles), 2 KB RAM, 1 KB true data EEPROM (300k write/erase cycles) 10-bit ADC: 7 multiplexed channels, ±1 LSB accuracy, scan mode and analog watchdog Advanced Control Timer: 16-bit, 4 CAPCOM channels, 3 complementary outputs, dead-time insertion and flexible synchronization General-Purpose Timers: 2x 16-bit, total 5 CAPCOM channels (IC/OC/PWM); 8-bit basic timer with 8-bit prescaler Auto Wakeup Timer: Wakeup from Active-halt mode Dual Watchdogs: Window watchdog + Independent watchdog with separate clock source Communication Interfaces: UART with clock output for synchronous operation, SmartCard, IrDA, LIN master mode; SPI up to 8 Mbit/s; I2C up to 400 Kbit/s Clock System: 4 master clock sources (external clock, crystal oscillator, user-trimmable 16 MHz RC, low-power 128 kHz RC), clock security system with monitor Low-Power Modes: Wait, Active-halt, Halt; individually switchable peripheral clocks High Reliability: Low-consumption POR/PDR, highly robust I/O design immune against current injection, 96-bit unique ID per device LQFP-32 Package: 7×7×1.4 mm, 25 I/Os Wide Operating Range: 2.95 V to 5.5 V, -40 °C to 85 °C Development Support: Embedded SWIM single-wire interface for fast on-chip programming and non-intrusive debugging

STM8S105K6T6C Applications

Industrial Control: PLCs, sensor transmitters, RS-485 communication nodes, small actuator control; wide temperature reliability LED Lighting: Dimming control, RGB strips, switching power supplies; direct PWM drive Battery Management: Protection boards, fuel gauges, charge management; low-power modes reduce standby consumption Home Appliances: Induction/microwave oven panels, small appliance main controllers Sensor Modules: Temperature/humidity/gas sensing; 10-bit ADC + I2C/UART flexible networking Consumer Electronics: Remote controls, electric toothbrushes, electronic toys; high-value 32-pin solution Motor Control: Fans, pumps, small motors; advanced timer with complementary PWM and dead-time Automotive Electronics: Vehicle light control, window anti-pinch, automotive sensor nodes (non-safety-critical)

STM8S105K6T6C Key Advantages

300k High-Endurance EEPROM: 1 KB true data EEPROM with 300k write/erase cycles (3x standard endurance), reliably storing calibration parameters and operation logs without external memory ICs 20 MIPS High Performance: 16 MHz STM8 core with Harvard architecture and 3-stage pipeline, delivering up to 20 MIPS for complex control algorithms Ultra-Cost-Effective: 32 KB Flash + 2 KB RAM + 1 KB true EEPROM + 10-bit ADC (7 channels) + multiple timers + UART/SPI/I2C in LQFP-32 package, minimizing BOM cost Advanced Timer for Motor Control: 4 CAPCOM channels, 3 complementary outputs with dead-time insertion, driving half-bridge circuits and motor control Rich I/O Resources: 25 I/Os with 5V tolerance, meeting peripheral connectivity needs Robust & Reliable: 4 clock sources + clock security system, low-consumption POR/PDR, independent watchdog with separate clock source Mature Ecosystem: STM8 classic architecture, rich documentation, low-cost SWIM debug, shortening development cycles Stable Supply Chain: STMicroelectronics mainstream access line with massive global shipments, ensuring stable supply

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FAQ:

1. What is the STM8S105K6T6C and its key specifications?
   The STM8S105K6T6C is an 8‑bit microcontroller from STMicroelectronics based on the STM8 core at up to 16 MHz. It provides 32 KB of Flash program memory, 2 KB of SRAM, and 1 KB of true data EEPROM. On‑chip peripherals include a 10‑bit ADC, an advanced control timer (TIM1) with 3 complementary PWM pairs, general‑purpose timers (TIM2, TIM4), and communication interfaces: UART, SPI, I2C. Housed in an LQFP‑32 package, it offers 28 I/O pins and operates from ‑40 °C to +85 °C. It does not include a CAN interface, making it a cost‑effective choice for motor control and sensor applications that do not require networking.

2. How does the STM8S105K6T6C differ from the STM8S105K4T6C?
   Both belong to the STM8S105 series, share the same core, package, and peripherals, but the K6T6C doubles the Flash from 16 KB (K4) to 32 KB. SRAM (2 KB) and EEPROM (1 KB) are identical. Both feature TIM1 with three complementary PWM pairs and lack a CAN controller. Choose the K6T6C if your firmware needs more code space; otherwise, the K4T6C is a more cost‑optimized alternative.

3. What is the difference between STM8S105K6T6C and STM8S207K6T6C?
   Both are 8‑bit STM8 MCUs in the same LQFP‑32 package and share the same Flash size (32 KB). The S207K6T6C, however, adds a CAN 2.0B controller and upgrades the SRAM to 6 KB and the EEPROM to 2 KB, while the S105K6T6C has 2 KB SRAM and 1 KB EEPROM. Both feature the TIM1 motor‑control timer. Choose the S105 for a simpler, lower‑cost motor drive; choose the S207 when you need CAN networking and larger memory.

4. Does the STM8S105K6T6C have a CAN bus interface?
   No. The STM8S105K6T6C does not include a CAN controller. It is designed for applications that need robust motor control and general‑purpose communication (UART, SPI, I2C) but do not require automotive or industrial CAN networks. If CAN is a must, consider the STM8S207K6T6C or the STM8S208 series.

5. Can the STM8S105K6T6C drive a brushless DC motor directly?
   Yes. The advanced timer TIM1 provides 3 complementary PWM pairs with programmable dead‑time insertion and a break input. This allows the MCU to directly control a three‑phase inverter or a BLDC motor half‑bridge without external dead‑time logic. It is widely used in fans, pumps, power tools, and home appliances.

6. What are the ADC specifications and how many analog channels are available on the STM8S105K6T6C?
   It features a 10‑bit successive‑approximation ADC. The chip internally supports up to 16 multiplexed analog input channels, but in the LQFP‑32 package, typically 7 to 10 external channels are available depending on which digital functions are enabled. The ADC can also measure an internal voltage reference and can be triggered by TIM1 for synchronized current sensing.

7. How much memory does the STM8S105K6T6C have?
   It provides 32 KB of Flash program memory, 2 KB of SRAM, and 1 KB of true data EEPROM. This memory configuration is well‑suited for compact motor‑control algorithms, sensor acquisition, and simple communication stacks.

8. What package and I/O count does the STM8S105K6T6C use?
   It comes in an LQFP‑32 package (7 mm × 7 mm, 0.8 mm lead pitch) and provides 28 general‑purpose I/O pins. The compact package is easy to hand‑solder and is a popular choice for space‑constrained designs that still need plenty of I/Os and a motor‑control timer.

9. Can the STM8S105K6T6C be powered directly from 5 V?
   Yes, it is a true 5 V‑capable microcontroller. The operating voltage range is 2.95 V to 5.5 V, so you can power it directly from a standard 5 V rail, USB, or a loosely regulated supply. All I/O pins are 5 V tolerant, simplifying interfaces with legacy logic.

10. How to program and debug the STM8S105K6T6C? What are its typical applications?
    Programming and debugging use the single‑wire SWIM interface. A low‑cost ST‑LINK/V2 is the standard tool, and firmware can be developed with STVD + Cosmic C or the open‑source SDCC compiler. ST provides standard peripheral libraries. Typical applications include home appliances, motor drives (fans, pumps, power tools), industrial sensors, power supplies, and general‑purpose 8‑bit control. Its three‑phase motor timer, 5 V operation, and generous I/O make it a reliable choice for cost‑conscious embedded designs.