STMicroelectronics STM8L052C6T6

Overview

STM8L052C6T6 from STMicroelectronics is an 8-bit ultra-low-power microcontroller featuring 32 KB Flash, 256-byte data EEPROM with ECC, RTC, LCD controller (4×28 segments), 12-bit ADC (1 Msps, 25 channels), and multiple timers including advanced control timer for motor control. It operates from 1.8 V to 3.6 V across –40 °C to +85 °C and targets battery-powered metering, portable medical devices, and smart sensors.

For engineers reviewing the STM8L052C6T6 datasheet, STM8L052C6T6 pinout, STM8L052C6T6 application, or STM8L052C6T6 equivalent, key selection criteria include ultra-low-power operation (350 nA Halt mode), integrated LCD driver with step-up converter, dual watchdogs, SWIM-based debugging, and LQFP48 package compatibility with industrial-grade timing and analog precision.

Technical Context

The STM8L052C6T6 implements a Harvard-architecture STM8 core with 3-stage pipeline, delivering 16 CISC MIPS at 16 MHz max frequency and supporting up to 40 external interrupt sources. Its clock system integrates three oscillators: 32 kHz LSE, 1–16 MHz HSE, and factory-trimmed 16 MHz HSI with 38 kHz LSI for low-power RTC.

Power management includes five configurable low-power modes - Wait, Low-power Run (5.1 µA), Low-power Wait (3 µA), Active-Halt with full RTC (1.3 µA), and Halt (350 nA) - enabled by BOR with five voltage thresholds, programmable PVD, and ultra-low I/O leakage (50 nA per pin). The RTC supports BCD calendar, alarm, and auto-wakeup with periodic interrupt.

Key Specifications

Pinout & Package

LQFP48 package, 7 × 7 mm body, 0.5 mm pitch, 48 pins. Pin mapping validated per STMicroelectronics DocID023331 Rev 2, Figure 3 and Table 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 STM8L052C6T6, STM8L152C6T6 offers double Flash and crypto-ready features at identical footprint, while EFM8LB12F64E-B-QFP48 trades LCD integration for capacitive sensing and different ecosystem tooling - both require PCB layout review for peripheral pin mapping changes.

Availability

STM8L052C6T6 is available at Aetrix Electronics and suitable for smart metering, portable diagnostics, and industrial sensor nodes requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for STM8L052C6T6 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, specializing in microcontrollers, power management, analog, and MEMS technologies for industrial, automotive, and consumer markets.

The STM8L Value Line is designed specifically for ultra-low-power embedded applications demanding extended battery life, robust real-time performance, and integrated peripherals - targeting metering, healthcare, and environmental monitoring.

FAQ

What is the maximum operating frequency and corresponding power consumption in Run mode?

The STM8L052C6T6 achieves a maximum CPU frequency of 16 MHz. At this speed and VDD = 3.3 V, typical active current is 195 µA/MHz + 440 µA, resulting in approximately 3.56 mA total. This value scales linearly with frequency and varies with supply voltage and peripheral activity per Table 17 in the datasheet.

Does the device support hardware-based AES encryption or secure boot?

No. The STM8L052C6T6 does not include hardware AES engines or secure boot functionality. It provides ECC on EEPROM and configurable Flash write protection, but cryptographic operations must be implemented in software. For hardware security, consider the STM8L152C6T6 or STM32L series.

Can the integrated LCD controller drive static or multiplexed displays?

Yes. The LCD controller supports static, 2-mux, 3-mux, and 4-mux configurations, enabling up to 4×28 segment operation. It includes software-programmable bias generation and internal step-up converter, eliminating external components for bias voltage generation in most common LCD types.

Is SWIM debugging compatible with standard JTAG/SWD debug probes?

No. SWIM (Single-Wire Interface Module) is ST's proprietary single-pin debug interface and requires ST-LINK/V2 or compatible programmers. It is not electrically or protocol-compatible with JTAG or SWD; however, it supports full breakpoint, register view, and flash programming functionality comparable to multi-pin interfaces.