STMicroelectronics STEVAL-IFR001V1

Overview

STEVAL-IFR001V1 from STMicroelectronics is an RTC calibration demonstration daughter card built around the M41T82SM6E real-time clock IC in SO-8 package, designed for plug-in evaluation with the STEVAL-IFS012V1 motherboard to demonstrate temperature-compensated RTC accuracy, timing stability, and GUI-driven mode selection across multiple RTC variants.

For engineers reviewing the STEVAL-IFR001V1 datasheet, STEVAL-IFR001V1 pinout, STEVAL-IFR001V1 application, or STEVAL-IFR001V1 equivalent, this board enables comparative RTC calibration testing, I²C interface validation, temperature-sensing integration, and GUI-controlled RTC parameter configuration in multi-device timing evaluation environments.

Technical Context

The daughter card implements a direct I²C interface between the M41T82SM6E RTC and the STEVAL-IFS012V1 motherboard, supporting register-level access to time/date, alarm, square-wave output, and battery-backed SRAM. It includes on-board 32.768 kHz crystal, backup battery circuitry, and pull-up resistors for SDA/SCL lines.

Calibration functionality relies on the M41T82's internal temperature sensor and programmable offset register (0x0F), allowing fine-tuning of oscillator drift across temperature ranges. The board lacks standalone power management or microcontroller - operation is fully dependent on host motherboard control and GUI interaction.

Key Specifications

Availability

STEVAL-IFR001V1 is available at Aetrix Electronics and suitable for RTC evaluation, multi-sensor timing system prototyping, and embedded firmware validation requiring stable component supply and documented interface compatibility with STEVAL-IFS012V1.

Supply support for STEVAL-IFR001V1 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, MEMS, power devices, and silicon solutions for industrial, automotive, and consumer applications.

The STEVAL-IFR001V1 belongs to ST's evaluation tools product line, developed specifically to accelerate RTC feature validation, temperature compensation testing, and GUI-based multi-device timing subsystem development using standardized daughter-card architecture.

FAQ

Is STEVAL-IFR001V1 a standalone evaluation board?

No. STEVAL-IFR001V1 is a daughter card that requires connection to the STEVAL-IFS012V1 motherboard for power, I²C communication, and GUI control. It has no onboard MCU, USB interface, or independent firmware - all operation is host-driven through the motherboard's interface layer and PC software.

What RTC functions can be calibrated using this board?

This board enables calibration of the M41T82SM6E's oscillator frequency drift via its 8-bit temperature compensation register (address 0x0F). Users can adjust timing offset in steps of ±0.195 ppm per LSB, validated through GUI-monitored timekeeping accuracy over temperature sweeps.

Does STEVAL-IFR001V1 include a crystal oscillator?

Yes. It integrates a 32.768 kHz tuning-fork crystal directly loaded for the M41T82SM6E, with matching load capacitance and layout optimized for low-jitter RTC operation. No external crystal or oscillator module is required for basic timekeeping or calibration tests.

Can STEVAL-IFR001V1 be used with other ST evaluation motherboards?

No. Mechanical and electrical design - including edge connector pinout, power rail mapping, and I²C address assignment - is specific to STEVAL-IFS012V1. Interfacing with other ST boards would require hardware modification and firmware adaptation not supported by ST documentation.