STMicroelectronics X-NUCLEO-EEICA1

Overview

X-NUCLEO-EEICA1 from STMicroelectronics is an I²C EEPROM memory expansion board for STM32 Nucleo development platforms, integrating dual selectable EEPROM devices (M24256E-F and M24M01E-F), supporting 100 kHz/400 kHz/1 MHz I²C modes, configurable device addressing, and software write protection on the M24M01E-F - used for storing calibration data, error logs, and user settings in industrial sensor systems.

For engineers reviewing the X-NUCLEO-EEICA1 datasheet, X-NUCLEO-EEICA1 pinout, X-NUCLEO-EEICA1 application, or X-NUCLEO-EEICA1 equivalent, this board enables rapid validation of I²C EEPROM integration, firmware-driven storage configuration, and traceable data persistence across NUCLEO-F401RE, NUCLEO-L053R8, NUCLEO-G474RE, and NUCLEO-H743ZI host boards.

Technical Context

The X-NUCLEO-EEICA1 implements a dual-EEPROM architecture with independent I²C bus routing to both M24256E-F (256 Kbit) and M24M01E-F (1 Mbit), each with dedicated address pins (A0–A2), write control (WC), and VCC/SDA/SCL terminals. Jumpers (JR1/JR2) select active device and configure I²C pull-up voltage (3.3 V or 5 V).

It supports all standard I²C timing modes - including Fast Mode Plus (1 MHz) - and provides preprogrammed device addresses on request. The board routes SDA/SCL signals through Arduino-compatible CN5/CN6 headers and ST Morpho CN7/CN8 connectors for seamless interfacing with STM32 Nucleo-64 and Nucleo-144 boards.

Key Specifications

Availability

X-NUCLEO-EEICA1 is available at Aetrix Electronics and suitable for industrial sensor calibration, manufacturing traceability systems, and embedded data-logging applications requiring stable component supply, firmware-upgradable storage, and long-term data integrity.

Supply support for X-NUCLEO-EEICA1 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 management, sensors, and development tools for industrial, automotive, and consumer markets.

The X-NUCLEO series targets rapid prototyping and firmware validation for STM32-based systems, with EEICA1 specifically engineered to accelerate I²C EEPROM evaluation and integration into production-ready embedded storage architectures.

FAQ

Does X-NUCLEO-EEICA1 require external power or draw from the Nucleo board?

X-NUCLEO-EEICA1 is powered directly from the host Nucleo board via its Arduino or Morpho headers - no external power supply is needed. It supports both 3.3 V and 5 V operation, selected by jumper configuration, and draws less than 3 mA during active I²C communication.

Can both EEPROMs be used simultaneously on the same I²C bus?

No - only one EEPROM (M24256E-F or M24M01E-F) can be active at a time, selected via hardware jumpers JR1 and JR2. Simultaneous use would cause I²C address conflict unless externally reconfigured with discrete level-shifting and bus isolation.

Is the firmware library compatible with STM32CubeIDE and HAL drivers?

Yes - the official ST-provided firmware library for X-NUCLEO-EEICA1 is built on STM32Cube HAL and fully compatible with STM32CubeIDE. Sample projects include read/write routines, address auto-detection, and write-protection enable/disable sequences for both EEPROM variants.

What mechanical form factor does X-NUCLEO-EEICA1 follow?

X-NUCLEO-EEICA1 adheres to the standardized 4-layer PCB form factor of the X-NUCLEO expansion board family: 31.5 mm × 26 mm, with 2.54 mm pitch male pin headers (CN5–CN9), Arduino UNO R3 footprint, and ST Morpho edge connector layout for stackable Nucleo compatibility.