STMicroelectronics EVB-LIV4F

Overview

EVB-LIV4F from STMicroelectronics is a standalone evaluation board for the Teseo-LIV4F dual-band (L1/L5) GNSS module, supporting GPS, Galileo, GLONASS, BeiDou, and QZSS constellations. It integrates USB power delivery with battery charging, provides NMEA output via UART-over-USB and signal connector, delivers PPS timing pulse, and includes ON/OFF and reset buttons plus status LEDs.

For engineers reviewing the EVB-LIV4F datasheet, EVB-LIV4F pinout, EVB-LIV4F application, or EVB-LIV4F equivalent, this board enables rapid validation of multiconstellation positioning accuracy, L1/L5 dual-frequency performance, PPS-based time synchronization, and embedded GNSS integration using ARM-based firmware and ST's Teseo Suite PC tool.

Technical Context

The EVB-LIV4F implements a complete hardware interface to the Teseo-LIV4F module, exposing UART and I²C interfaces via USB and signal connector respectively. It supports both USB bus-powered operation and standalone battery-powered usage with integrated charge management.

GNSS antenna connection uses an SMA female connector; VCC and VBAT rails are accessible through the signal connector. NMEA messages are routed over UART via USB CDC class, while PPS output and system control signals (ON/OFF, RESET) are brought out for external monitoring and sequencing.

Key Specifications

Availability

EVB-LIV4F is available at Aetrix Electronics and suitable for GNSS receiver validation, dual-frequency positioning prototyping, and PPS-based time-synchronization development requiring stable component supply, traceable sourcing, and long-term design-in support.

Supply support for EVB-LIV4F 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, designing and manufacturing microcontrollers, sensors, power ICs, and wireless solutions for industrial, automotive, and consumer applications.

EVB-LIV4F belongs to ST's Teseo GNSS module evaluation platform family, engineered to accelerate development of high-accuracy, multi-constellation positioning systems for asset tracking, precision timing, and navigation-grade embedded devices.

FAQ

Does EVB-LIV4F require external firmware loading to operate?

No. The EVB-LIV4F ships preloaded with factory firmware for the onboard Teseo-LIV4F module. It outputs standard NMEA sentences over USB-UART immediately upon power-up. Firmware updates or configuration changes are performed using ST's Teseo Suite PC software via USB connection.

Can the EVB-LIV4F be powered solely by its onboard battery?

Yes. The board supports standalone battery operation with integrated charging circuitry. When a compatible rechargeable Li-ion or Li-polymer battery is installed, the board powers up autonomously and charges the battery when USB is connected - no external power supply or charger circuit is needed.

What GNSS constellations and bands does EVB-LIV4F support out-of-the-box?

EVB-LIV4F supports GPS L1 C/A + L5, Galileo E1 + E5a, GLONASS L1, BeiDou B1I + B2a, and QZSS L1 C/A + L5 - all enabled simultaneously by the Teseo-LIV4F module. No hardware modification or firmware patch is required to activate multiconstellation tracking.

Is the PPS output synchronized to UTC, and what is its timing accuracy?

Yes, the PPS output is aligned to UTC time derived from GNSS satellite atomic clocks. Under open-sky conditions with L1+L5 dual-band lock, timing accuracy is ≤15 ns RMS jitter and <100 ns absolute offset relative to UTC, as specified in the Teseo-LIV4F datasheet and verified using ST's reference test setup.