STMicroelectronics STM8L-DISCOVERY

Overview

STM8L-DISCOVERY from STMicroelectronics is an evaluation and development board built around the STM8L152C6T6 8-bit ultralow-power microcontroller (32 KB Flash, 2 KB RAM, 1 KB EEPROM, 48-pin LQFP), featuring integrated ST-Link debugger, 28-pin LCD display (24 segments × 4 commons), four user LEDs, two push buttons, and on-board IDD current measurement circuitry. It supports USB or external 3.3 V/5 V power and can supply target circuits with both 3 V and 5 V.

For engineers reviewing the STM8L-DISCOVERY datasheet, STM8L-DISCOVERY pinout, STM8L-DISCOVERY application, or STM8L-DISCOVERY equivalent, this board enables rapid validation of STM8L152 low-power modes, LCD segment driving, SWIM-based debugging, and real-time current consumption profiling in embedded ultralow-power designs.

Technical Context

The board implements a complete evaluation environment for the STM8L152C6T6 MCU, leveraging its native SWIM debug interface via an onboard ST-Link subsystem that operates in either embedded or standalone mode using the SWIM connector. The IDD measurement path integrates precision shunt sensing and configurable gain amplification to resolve sub-mA current draw across run, wait, and ultra-low-power halt modes.

It provides direct access to all 48 LQFP I/O pins through a standardized extension header, supporting prototyping with breadboards or custom carrier boards. The preloaded demonstration firmware uses the MCU's built-in LCD controller to drive the 24-segment × 4-common DIP display while dynamically updating current readings and mode status without host PC dependency.

Key Specifications

Availability

STM8L-DISCOVERY is available at Aetrix Electronics and suitable for ultralow-power sensor node development, battery-operated LCD display prototyping, and STM8L152-based energy harvesting system validation requiring stable component supply and long-term toolchain continuity.

Supply support for STM8L-DISCOVERY 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, analog ICs, power devices, and sensors for industrial, automotive, and consumer applications.

This board belongs to ST's Discovery series - a family of low-cost, feature-rich evaluation platforms intended to accelerate learning, firmware development, and hardware integration for ST's ultralow-power microcontroller families.

FAQ

Does STM8L-DISCOVERY support programming and debugging of external STM8L targets?

Yes - the onboard ST-Link can operate in standalone mode via the SWIM connector, enabling programming and debugging of external STM8L152 or compatible MCUs. The selection mode switch configures ST-Link as either embedded debugger or independent programmer without requiring host PC reconfiguration.

What LCD module is supported, and how is it interfaced?

The board includes a 28-pin DIP LCD module with 24 segments and 4 commons, directly driven by the STM8L152C6T6's integrated LCD controller. No external driver IC is required; all bias generation, timing, and segment mapping are handled natively by the MCU's peripheral.

Can STM8L-DISCOVERY measure current consumption of external circuits?

No - the IDD measurement circuitry is calibrated and routed exclusively for the onboard STM8L152C6T6. It measures only the MCU's own current draw in real time; external circuits must be measured using separate instrumentation or custom shunt placement.

Is the demonstration firmware source code publicly available?

Yes - ST provides the full source code and documentation for the preloaded demonstration firmware (including LCD-driven current readout and low-power mode transitions) on st.com/stm8l-discovery. It is compatible with IAR Embedded Workbench for STM8 and ST Visual Develop toolchains.