STMicroelectronics STM8L101G2U6TR

Overview

STM8L101G2U6TR 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 STM8L101G2U6TR datasheet, STM8L101G2U6TR pinout, STM8L101G2U6TR application, or STM8L101G2U6TR equivalent, key selection criteria include ultra-low-power Halt mode (0.3 µA), SWIM single-wire debug interface, UFQFPN28 package compatibility, and integrated IR transmitter capability for remote control subsystems.

Technical Context

The STM8L101G2U6TR implements the STM8 CISC 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-power oscillator (LSI) for independent watchdog and auto-wakeup unit timing. Its interrupt controller supports nested priority handling across up to 29 external sources.

Memory architecture includes ECC-protected Flash with in-application programming support, 2 Kbytes of emulated data EEPROM, and flexible read/write protection. Power management integrates three low-power modes - Wait, Active-halt, and Halt - each with distinct clock gating and peripheral retention strategies to minimize energy per wake-up cycle.

Key Specifications

Pinout & Package

STM8L101G2U6TR is housed in a 28-pin Ultra Thin Fine Pitch Quad Flat No-Lead (UFQFPN28) package, 4 × 4 mm body, 0.5 mm pitch, with exposed thermal pad. Pin functions are validated per Figure 6 ("28-pin UFQFPN package pinout for STM8L101G3U6ATR and STM8L101G2U6ATR") in DocID15275 Rev 16.

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, STM8L101G2U6TR provides IR hardware acceleration and lower Halt current (0.3 µA vs. 0.5 µA), while EFM8LB12F32ES1-QFP32 offers greater memory and mixed-signal features at higher cost and power - making STM8L101G2U6TR optimal for cost-sensitive, IR-centric, battery-constrained designs.

Availability

STM8L101G2U6TR is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical devices, smart home remotes, and industrial status monitors requiring stable component supply over extended production lifecycles.

Supply support for STM8L101G2U6TR 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, sensors, and automotive semiconductors.

The STM8L series targets ultra-low-power embedded applications - emphasizing sub-µA sleep modes, integrated peripherals for sensor interfacing, and robust operation across industrial temperature ranges.

FAQ

What is the maximum operating frequency of the STM8L101G2U6TR?

The STM8L101G2U6TR runs at up to 16 MHz using its internal 16 MHz RC oscillator (HSI), which achieves typical accuracy of ±1% over temperature and supply voltage. External crystal support is not provided - all timing derives from calibrated internal oscillators.

Does the STM8L101G2U6TR support in-application programming (IAP)?

Yes, it supports full in-application programming of Flash memory via the SWIM interface or bootloader routines. The Flash includes error correction code (ECC) and flexible write protection modes, enabling safe firmware updates without halting critical real-time tasks.

How many I/O pins does the STM8L101G2U6TR have, and what are their drive capabilities?

The UFQFPN28 variant provides 25 usable I/O pins (PA0–PA7, PB0–PB7, PC0–PC7, plus NRST and SWIM). All support programmable pull-ups; PA0 delivers 20 mA sink for IR LED driving, while other ports provide up to 15 mA sink/source - verified per Table 27 and Table 29 in DocID15275 Rev 16.

Is there hardware support for infrared transmission, and how is it implemented?

Yes - dedicated IR hardware block generates modulated 38 kHz carrier on PA0 (CLK) and data on PA1 (DATA), supporting NEC and RC5 protocols. This offloads the CPU and guarantees precise timing without software intervention, as confirmed in Section 3.13 and Figure 1 of the datasheet.