STMicroelectronics EVB-LIV3R

Overview

EVB-LIV3R from STMicroelectronics is a standalone evaluation board for the Teseo-LIV3R GNSS ROM module, integrating ARM-based processing, multi-constellation positioning (GPS/Glonass/Beidou/QZSS), USB-powered operation with battery charging, and PPS timing output. It supports NMEA over UART via USB and I²C via header, with SMA antenna interface and onboard power/reset controls.

For engineers reviewing the EVB-LIV3R datasheet, EVB-LIV3R pinout, EVB-LIV3R application, or EVB-LIV3R equivalent, key selection considerations include GNSS constellation support, USB-to-UART bridge dependency (FTDI driver), PPS accuracy validation, and standalone battery footprint compatibility with field-deployable testing.

Technical Context

The EVB-LIV3R implements direct hardware access to the Teseo-LIV3R module's UART and I²C interfaces through dedicated connectors, enabling host PC communication via USB virtual COM port and embedded system integration via 4-pin I²C header. Power is supplied either via USB 5V or an internal Li-ion battery with integrated charge management.

PPS output is derived from the module's precise 1 Hz timing signal, synchronized to GNSS time, and routed to an LED indicator and test point. Antenna connection uses a standard SMA female jack supporting active/passive GNSS antennas with 50 Ω impedance.

Key Specifications

Availability

EVB-LIV3R is available at Aetrix Electronics and suitable for GNSS module validation, embedded navigation prototyping, and PPS-based time-stamping applications requiring stable component supply and documented reference hardware.

Supply support for EVB-LIV3R 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 markets.

The EVB-LIV3R belongs to ST's Teseo GNSS platform family, engineered to accelerate development of location-aware devices with pre-certified, ROM-based firmware and minimal external component requirements.

FAQ

Does EVB-LIV3R require external drivers to communicate with a PC?

Yes. The board uses an FTDI USB-to-UART bridge chip, requiring the FTDI Virtual COM Port (VCP) driver installed on the host PC. This driver is freely available from FTDIChip.com and must be loaded before using ST Teseo Suite or terminal software to receive NMEA messages.

Can EVB-LIV3R operate without a USB connection?

Yes. The board supports standalone operation using an internal Li-ion battery footprint. When a compatible battery is installed and charged via USB, the board maintains full GNSS functionality including PPS output and NMEA streaming over UART/I²C without continuous USB power.

What antenna type is compatible with the SMA connector on EVB-LIV3R?

The SMA female jack accepts standard 50 Ω GNSS antennas. Active antennas with built-in LNA and 3–5 V DC bias are supported; passive antennas also work but may reduce sensitivity in low-signal environments. Antenna polarity and gain must match the target deployment scenario.

Is ST Teseo Suite required to configure the Teseo-LIV3R module on this board?

ST Teseo Suite is the official PC tool for configuring, monitoring, and validating the Teseo-LIV3R module - including NMEA message filtering, PPS calibration, and constellation enable/disable. While raw NMEA data can be read via serial terminal, full feature access requires this software.