STMicroelectronics STEVAL-ICB002V1

Overview

STEVAL-ICB002V1 from STMicroelectronics is a capacitive touch daughterboard based on the STMPE821 8-channel capacitive touch key controller, designed to interface with the STEVAL-PCC009V3 STM32-based motherboard via a 10-pin connector. It demonstrates up to 3 independent capacitive touch keys, provides GPIO-driven LED feedback, and generates configurable PWM output for visual indication - all powered over the motherboard's USB Mini-B supply.

For engineers reviewing the STEVAL-ICB002V1 datasheet, STEVAL-ICB002V1 pinout, STEVAL-ICB002V1 application, or STEVAL-ICB002V1 equivalent, this board serves as a validated hardware reference for evaluating STMPE821's integrated touchkey sensing, GPIO expansion, and PWM generation in embedded human-interface designs.

Technical Context

The STEVAL-ICB002V1 implements the STMPE821's native I²C interface (standard-mode, 100 kHz) to communicate with the STM32 host on the STEVAL-PCC009V3 motherboard. The board routes all 8 GPIOs and 3 dedicated touch input channels of the STMPE821, with three physical copper-pour touch pads mapped to channels 0–2.

Touch detection uses the STMPE821's built-in capacitive sensing engine with programmable threshold and debounce settings; GPIO outputs drive discrete LEDs directly; one GPIO channel is configured as PWM output with frequency/tone control via register writes - no external timing components required.

Key Specifications

Availability

STEVAL-ICB002V1 is available at Aetrix Electronics and suitable for capacitive touch evaluation, STMPE821 firmware validation, and STM32-based HMI prototyping requiring stable component supply and documented reference design integration.

Supply support for STEVAL-ICB002V1 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, sensors, and digital media solutions.

This board belongs to ST's STEVAL (ST Evaluation) series - purpose-built reference platforms that demonstrate specific IC functionality in real-world configurations, accelerating customer evaluation and firmware development for ST's interface and human-machine interaction products.

FAQ

Does STEVAL-ICB002V1 operate independently, or does it require additional hardware?

No, STEVAL-ICB002V1 is a daughterboard and cannot function standalone. It requires the STEVAL-PCC009V3 STM32-based interface board as its motherboard, which provides power, I²C communication, and host processing. The two boards connect via a standardized 10-pin header, and no additional adapters or cables are needed for basic operation.

What firmware or software is needed to use this board?

The board ships without preloaded firmware. Users must develop or port firmware for the STM32 host (on STEVAL-PCC009V3) using ST's STMPE821 driver libraries and HAL APIs. Example code for touch polling, interrupt handling, GPIO control, and PWM configuration is provided in ST's official application note AN3921 and the STMPE821 datasheet register map.

Can the number of touch keys be expanded beyond three on this board?

No - the physical layout fixes three copper-pour touch pads tied to STMPE821 channels CH0–CH2. While the STMPE821 supports up to eight channels, the STEVAL-ICB002V1 PCB does not expose or route the remaining five channels (CH3–CH7) to accessible pads or connectors, limiting functional evaluation to exactly three keys.

Is USB connectivity native to STEVAL-ICB002V1?

No - STEVAL-ICB002V1 has no USB interface. Power and data are delivered exclusively through the 10-pin interconnect from the STEVAL-PCC009V3 motherboard, whose USB Mini-B port supplies 5 V and hosts the STM32's USB peripheral for PC communication and firmware updates.