STMicroelectronics STEVAL-IPE009V1

Overview

STEVAL-IPE009V1 from STMicroelectronics is a mono-phase, multi-tariff energy meter demonstration board built around the ST72F321BR9T6 microcontroller, STPM14 energy metering ASSP, M41T94 RTC, and M95256 SPI EEPROM. It delivers Class 1 accuracy (IEC 61036:1996 + A1:2000) at 5 A–80 A, supports up to 4 tariffs, and includes tamper detection, real-time clock, 24×4 segment LCD driver, and battery-backed EEPROM for 256 Kb data retention.

For engineers reviewing the STEVAL-IPE009V1 datasheet, STEVAL-IPE009V1 pinout, STEVAL-IPE009V1 application, or STEVAL-IPE009V1 equivalent, this board serves as a validated reference platform for evaluating single-phase metering firmware, tariff scheduling logic, maximum demand calculation, and anti-tamper feature implementation in utility-grade meter designs.

Technical Context

The board implements a complete static electricity meter architecture: the STPM14 performs high-accuracy active energy measurement using current transformer inputs and voltage scaling, while the ST72F321BR9T6 handles tariff switching, LCD refresh, RTC synchronization via SPI, and EEPROM data logging. All critical metrology functions-including no-load detection, reverse power indication, and case tamper sensing-are implemented in firmware with hardware support from dedicated GPIOs and analog comparators.

Power management integrates VIPER12ADIP AC/DC converter for 230 VAC input, L78L05AC linear regulator, and battery backup for RTC and tamper monitoring during mains failure. The system supports IrDA and RS-232 SCI interfaces for configuration and data readout, with all timing-critical operations synchronized to the 32.768 kHz RTC crystal and 4.194304 MHz STPM14 clock source.

Key Specifications

Availability

STEVAL-IPE009V1 is available at Aetrix Electronics and suitable for utility meter evaluation, smart grid prototyping, and energy monitoring system development requiring stable component supply, long-term design continuity, and compliance-ready reference implementations.

Supply support for STEVAL-IPE009V1 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, power ICs, sensors, and analog/mixed-signal devices for industrial, automotive, and consumer applications.

This board belongs to ST's STEVAL (ST Evaluation) series-engineered to accelerate time-to-market for metering, power conversion, and sensor-based systems by delivering fully tested, schematically documented, and firmware-supported reference platforms.

FAQ

Is STEVAL-IPE009V1 still in production?

No-STEVAL-IPE009V1 is marked "Obsolete Product(s)" in the official STMicroelectronics documentation (Data Brief Rev 1, September 2008). It remains available through legacy distribution channels for design reuse and technical reference, but no new silicon revisions or firmware updates are planned.

What firmware is preloaded on the ST72F321BR9T6?

The board ships with factory-programmed firmware supporting full Class 1 metrology, 4-tariff scheduling, LCD display of kWh and MD, tamper event logging, and SPI communication with STPM14 and EEPROM. Source code is not included, but ST provides application notes AN2672 and AN2727 covering calibration and firmware structure.

Can the STPM14 be replaced with a newer ST energy meter IC?

Direct replacement is not feasible-the STPM14 uses proprietary calibration and communication protocols with the ST72F321BR9T6. Migration would require firmware rewrite and PCB layout changes, as newer devices like STPM32 or STPM33 use different pinouts, SPI register maps, and metrology engines.

Does the board support optical pulse output for remote reading?

Yes-it includes an LED (D9) driven by the ST72F321BR9T6's PWM channel, configured to emit calibrated optical pulses proportional to active energy (e.g., 1000 imp/kWh), compliant with IEC 62053-31 for interface with automatic meter reading (AMR) systems.