STMicroelectronics STM8L101F2P3

Overview

STM8L101F2P3 from STMicroelectronics is an 8-bit ultra-low-power microcontroller featuring 4 Kbytes Flash, 1.5 Kbytes RAM, 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 Halt-mode current as low as 0.3 µA-designed for battery-powered sensor nodes and smart metering endpoints.

For engineers reviewing the STM8L101F2P3 datasheet, STM8L101F2P3 pinout, STM8L101F2P3 application, or STM8L101F2P3 equivalent, key selection criteria include its 20-pin TSSOP package, 16 MHz STM8 CISC core (16 MIPS), ultra-low-power sleep modes, SWIM debug interface, and integrated IR transmitter capability for remote-control subsystems.

Technical Context

The STM8L101F2P3 implements a CISC-based STM8 core with hardware stack and 32-bit extended addressing, supporting up to 16 MIPS at 16 MHz. Its clock system integrates dual RC oscillators: a 16 MHz high-speed internal RC (HSI) with 4 µs wakeup time and a 38 kHz low-power LSI for independent watchdog and auto-wakeup unit timing.

Interrupt handling uses a nested controller with software-configurable priority across 29 external sources. Memory architecture includes ECC-protected Flash, flexible read/write protection, and in-application programming support-enabling field firmware updates without external programmers.

Key Specifications

Pinout & Package

The STM8L101F2P3 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 STM8L101F2P3, the STM8L051F3P6 offers more Flash for complex firmware but removes IR-specific hardware, while the EFM8SB10F8G achieves deeper sleep at the cost of added design complexity for IR functionality.

Availability

STM8L101F2P3 is available at Aetrix Electronics and suitable for smart metering, wireless sensor nodes, IR remote transmitters, and industrial status indicators requiring stable component supply and long-term lifecycle assurance.

Supply support for STM8L101F2P3 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, delivering automotive, industrial, and embedded solutions with emphasis on energy efficiency and system integration.

The STM8L101 series belongs to ST's ultra-low-power 8-bit MCU product line, engineered specifically for cost-sensitive, battery-operated applications demanding sub-µA sleep currents and rapid wake-up responsiveness.

FAQ

Does STM8L101F2P3 support in-circuit programming via SWIM?

Yes. The STM8L101F2P3 features a hardware Single Wire Interface Module (SWIM) that enables full in-circuit programming and non-intrusive debugging using only one dedicated pin (SWIM). No external programmer is required beyond a SWIM-compliant debugger such as ST-LINK/V2-1, and firmware updates can be performed without removing the device from the target board.

What is the maximum operating frequency and corresponding current draw in Run mode?

The STM8L101F2P3 runs at up to 16 MHz with a typical active current of 150 µA/MHz at 3.0 V. At full speed (16 MHz), total Run-mode current is approximately 2.4 mA - measured under standard conditions with all peripherals disabled except the CPU and system clock tree.

Can PA0 be used for both LED driving and general-purpose I/O?

Yes. PA0 is a multifunction pin with high-sink capability (up to 20 mA) and configurable as a standard GPIO, comparator input, or infrared output. When used as an IR driver, it generates modulated 38 kHz carrier; otherwise, it behaves as a standard push-pull or open-drain output with programmable pull-up resistors.

Is the 96-bit unique ID accessible in firmware?

Yes. The STM8L101F2P3 contains a factory-programmed, read-only 96-bit unique identifier stored in system memory. It is accessible via memory-mapped registers at address 0x4865–0x486A and can be read during initialization for device authentication, serialization, or secure boot binding.