STMicroelectronics STM8L101F2P6

Overview

STM8L101F2P6 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 dynamic run current of 150 µA/MHz - optimized for battery-powered sensor nodes and portable medical devices.

For engineers reviewing the STM8L101F2P6 datasheet, STM8L101F2P6 pinout, STM8L101F2P6 application, or STM8L101F2P6 equivalent, key selection criteria include its 20-pin TSSOP package, 16 MHz internal RC oscillator with 4 µs wakeup, Halt-mode power consumption of 0.3 µA, SWIM debug interface, and LED-driver-capable PA0 pin for infrared transmission.

Technical Context

The STM8L101F2P6 implements the STM8 CISC core delivering up to 16 MIPS at 16 MHz, with nested interrupt controller supporting 29 external sources and software priority management. Its clock system integrates dual RC oscillators: a 16 MHz high-speed internal (HSI) for active operation and a 38 kHz low-speed internal (LSI) dedicated to independent watchdog (IWDG) and auto-wakeup unit (AWU).

Power architecture includes ultra-low-power POR/PDR and three distinct low-power modes - Wait, Active-halt, and Halt - enabling sub-µA retention states. Memory subsystem comprises 4 Kbytes Flash with ECC, 2 Kbytes data EEPROM (shared address space), and 1.5 Kbytes SRAM, all accessible during Halt mode for fast resume.

Key Specifications

Pinout & Package

The STM8L101F2P6 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 validated 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 and EFM8LB12F32ES1-QFP24, the STM8L101F2P6 uniquely balances minimal footprint, sub-µA Halt power, and hardware IR modulation - making it optimal for cost-sensitive, battery-operated IR remotes and compact sensor transmitters where code size ≤4 Kbytes suffices.

Availability

STM8L101F2P6 is available at Aetrix Electronics and suitable for smart metering endpoints, wearable health monitors, industrial sensor nodes, and home appliance remote controls requiring stable component supply and long-term manufacturability.

Supply support for STM8L101F2P6 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 management ICs, MEMS, and automotive semiconductors since 1987.

The STM8L series targets ultra-low-power embedded applications - specifically battery-operated consumer, industrial, and medical devices demanding sub-µA sleep currents, robust memory integrity, and integrated analog/mixed-signal peripherals in compact packages.

FAQ

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

The STM8L101F2P6 achieves a maximum CPU frequency of 16 MHz using its internal 16 MHz RC oscillator (HSI), which starts in under 4 µs. External crystals up to 16 MHz may also be used via OSC_IN/OSC_OUT pins. The HSI delivers ±1% accuracy across –40 °C to +85 °C and 1.65–3.6 V, eliminating need for external timing components in most cost-sensitive designs.

Does the device support in-application programming (IAP) of Flash memory?

Yes, the STM8L101F2P6 supports full in-application programming of Flash memory via its embedded bootloader, allowing firmware updates without halting execution. This is enabled through dedicated Flash programming registers and protected by configurable option bytes that define write-protection sectors and read-out protection levels.

How does the infrared (IR) interface function and what protocols does it support?

The IR interface uses PA0 as a dedicated high-sink output with built-in carrier modulation logic (30–56 kHz). It accepts raw pulse-width data via memory-mapped registers and handles carrier generation autonomously - supporting NEC, RC-5, and custom protocols without CPU intervention. No external encoder IC is required.

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

No - the 2 Kbytes of data EEPROM resides within the same Flash memory array but is managed separately via dedicated EEPROM programming routines and ECC logic. It shares endurance (100k cycles) and retention (>20 years) specs with main Flash, but uses distinct address space and erase/write commands to prevent accidental corruption of program code.