STMicroelectronics STM8L101F3P6

Overview

STM8L101F3P6 from STMicroelectronics is an 8-bit ultra-low-power microcontroller featuring 8 Kbytes Flash, 1.5 Kbytes SRAM, and integrated peripherals including two 16-bit timers, USART, SPI, I²C, two comparators, and infrared remote control interface. It operates from 1.65 V to 3.6 V across –40 °C to +85 °C, with dynamic run current of 150 µA/MHz and halt mode consumption as low as 0.3 µA - deployed in battery-powered sensor nodes and portable medical monitors.

For engineers reviewing the STM8L101F3P6 datasheet, STM8L101F3P6 pinout, STM8L101F3P6 application, or STM8L101F3P6 equivalent, key selection criteria include ultra-low-power operation down to 0.3 µA in Halt mode, 20-pin TSSOP package compatibility, SWIM-based debugging support, and integrated IR transmitter capability for remote control subsystems.

Technical Context

The STM8L101F3P6 implements a CISC-based STM8 core delivering up to 16 MIPS at 16 MHz, with dual internal RC oscillators: a 16 MHz high-speed oscillator (HSI) for active operation and a 38 kHz low-speed oscillator (LSI) for watchdog and auto-wakeup functions. Its nested interrupt controller supports up to 29 external sources with software-configurable priority levels.

Memory architecture includes ECC-protected Flash with in-application programming, 2 Kbytes of emulated data EEPROM, and 1.5 Kbytes of static RAM. Clock management integrates prescalers, switchable clock sources, and automatic failover between HSI and LSI - enabling robust timing control in energy-constrained embedded systems.

Key Specifications

Pinout & Package

STM8L101F3P6 is housed in a 20-pin TSSOP package (6.5 × 4.4 mm, 0.65 mm pitch), optimized for compact PCB layouts and automated assembly. Pin functions are fully defined per ST's DocID15275 Rev 16, Figure 4.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM8L051F3P6, the STM8L101F3P6 provides critical IR transmission and 2 KB data EEPROM - essential for remote control and configuration retention. Versus EFM8LB12F32ES1, it offers lower system-level BOM cost and simpler migration from legacy STM8 designs, despite smaller memory.

Availability

STM8L101F3P6 is available at Aetrix Electronics and suitable for smart metering endpoints, portable medical sensors, IR remote transmitters, and industrial sensor nodes requiring stable component supply over extended production lifecycles.

Supply support for STM8L101F3P6 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 STM8L series targets ultra-low-power embedded applications where battery life, cost efficiency, and integration density are critical - emphasizing sub-µA sleep modes, on-chip peripherals, and robust qualification for harsh environments.

FAQ

Does STM8L101F3P6 support in-circuit programming via SWIM?

Yes. The STM8L101F3P6 features a hardware Single Wire Interface Module (SWIM) that enables full in-circuit programming and non-intrusive debugging using ST-LINK/V2 or compatible tools. No external bootloader code is required - the SWIM interface is implemented in ROM and accessible through the dedicated SWIM pin.

What is the maximum operating frequency and how is it achieved?

The STM8L101F3P6 achieves a maximum CPU frequency of 16 MHz using its internal 16 MHz high-speed RC oscillator (HSI), which has a typical accuracy of ±1% at 3 V and 25 °C. Frequency stability is maintained across voltage and temperature via factory-trimmed calibration values stored in option bytes - no external crystal is needed for most timing-critical applications.

Can PA0 be used to drive an infrared LED directly?

Yes. PA0 is configured as a high-sink I/O capable of delivering up to 20 mA at VDD = 3.3 V, with dedicated hardware support for infrared carrier generation (38 kHz) and modulation. This allows direct connection of standard IR LEDs (e.g., TSAL6200) without external drivers or timing firmware - verified in ST Application Note AN3123.

Is the 2 Kbytes of data EEPROM physically separate from Flash memory?

No. The 2 Kbytes of data EEPROM is emulated in the main 8 Kbytes Flash memory using ST's proprietary wear-leveling and ECC-protected page management. It behaves electrically and logically as EEPROM - supporting byte-write and sector-erase operations - but shares the same physical Flash array and endurance rating (100 k erase/write cycles).