STMicroelectronics STM8S103F2P6

Overview

STM8S103F2P6 from STMicroelectronics is an 8-bit access-line microcontroller featuring a 16 MHz STM8 core, 8 Kbyte Flash program memory, 640 byte data EEPROM, 10-bit ADC with 5 channels, UART/SPI/I²C interfaces, and three timers-including a 16-bit advanced control timer with dead-time insertion. It targets cost-sensitive embedded control in industrial sensors, motor drive supervision, and smart appliance subsystems.

For engineers reviewing the STM8S103F2P6 datasheet, STM8S103F2P6 pinout, STM8S103F2P6 application, or STM8S103F2P6 equivalent, key selection criteria include its 20-pin TSSOP package, 2.95–5.5 V supply range, 300 kcycle EEPROM endurance, nested interrupt controller supporting 32 vectors, and SWIM single-wire debug interface for space-constrained designs.

Technical Context

The STM8S103F2P6 implements a Harvard-architecture STM8 core with 3-stage pipeline and extended instruction set, enabling deterministic real-time execution at up to 16 MHz. Its clock system integrates four independent sources-16 MHz internal RC (user-trimmable), 128 kHz low-power RC, external crystal/resonator, and external clock-with clock security monitoring and per-peripheral clock gating.

Analog and timing subsystems include a 10-bit ±1 LSB ADC with scan mode and analog watchdog, plus three dedicated timers: TIM1 (16-bit advanced, 4 CAPCOM, 3 complementary outputs), TIM2 (16-bit general purpose), and TIM4 (8-bit basic). Communication is supported by full-duplex UART (with LIN/SmartCard/IrDA modes), SPI up to 8 Mbit/s, and I²C up to 400 kbit/s.

Key Specifications

Pinout & Package

TSSOP20 package (4.4 mm body width, 0.65 mm pitch), 7.2 mm × 4.4 mm footprint, lead-free and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit microcontroller applications.

Compared with STM8S003F3P6, the STM8S103F2P6 adds critical motor control features and double the EEPROM; versus EFM8BB10F8G-A-QSOP24, it trades USB for proven SWIM debug and built-in EEPROM - making it optimal for cost-sensitive, self-contained embedded controllers where firmware update resilience and analog logging are essential.

Availability

STM8S103F2P6 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart appliance subsystems, and motor drive supervision requiring stable component supply across multi-year production cycles.

Supply support for STM8S103F2P6 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power devices, sensors, and analog ICs for industrial, automotive, and consumer markets.

The STM8S series delivers cost-optimized 8-bit MCUs targeting resource-constrained embedded applications requiring high reliability, low power, and integrated peripherals - especially where Flash/E²PROM co-location and SWIM debug simplify development and maintenance.

FAQ

Does STM8S103F2P6 support hardware debugging during runtime?

Yes. The device integrates a Single-Wire Interface Module (SWIM) that enables full in-circuit debugging - including breakpoints, register inspection, and real-time variable monitoring - using only the SWIM pin and VDD/VSS. No external debugger hardware is required beyond a standard SWIM programmer such as ST-LINK/V2.

What is the maximum ADC sampling rate achievable with STM8S103F2P6?

The ADC supports up to 1 MSPS conversion rate when configured with minimal acquisition time and using the internal 16 MHz clock source. At 10-bit resolution, typical throughput is 170 kSPS in continuous scan mode with 5 channels, limited by CPU overhead and prescaler settings documented in Section 10.3.10 of DS6120 Rev 15.

Can STM8S103F2P6 operate reliably at 5.5 V supply with all peripherals enabled?

Yes. Electrical characteristics in DS6120 Rev 15 confirm full functionality across the entire 2.95–5.5 V range, including all timers, UART, SPI, I²C, and ADC. At 5.5 V, maximum fCPU remains 16 MHz, and total current consumption in run mode is 6.2 mA (typical) with all clocks active - within absolute maximum ratings.

Is there a migration path from STM8S103F2P6 to a pin-compatible 32-pin variant?

No direct pin-compatible 32-pin variant exists for the F2P6 (TSSOP20). The STM8S103K3 uses LQFP32/UFQFPN32 packages but has different pin mapping - e.g., NRST moves from pin 15 to pin 1, and SWIM shifts from PA1 to PA13. Migration requires PCB redesign and signal remapping, though firmware compatibility is maintained across the STM8S103 family.