ST EVB-LIV4F User manual

Introduction
The EVB-LIV4F evaluation board is a complete standalone evaluation platform for Teseo-LIV4F tiny dual band GNSS module.
Teseo-LIV4F module is an easy to use dual-band global navigation satellite system (GNSS) standalone module, embedding
Teseo IV single die standalone positioning receiver IC working simultaneously on multiple constellations (GPS/Galileo/Glonass/
BeiDou/QZSS).
The EVB-LIV4F is designed for top performance Teseo-LIV4F GNSS module.
EVB-LIV4F Evaluation board
UM3212
User manual
UM3212 - Rev 1 - July 2023
For further information contact your local STMicroelectronics sales office.
www.st.com

1 Features
The EVB-LIV4F has the following features:
• USB power supply
• Internal backup battery placing (battery not provided)
• Push buttons to switch ON and OFF
• I2C and Current measurement connector
• Reset button
• UART by USB connector
• PPS output LED
• Power output LED
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Features
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2 EVB-LIV4F general presentation
The EVB-LIV4F kit is composed of several elements:
• EVB-LIV4F evaluation board;
• GNSS active antenna;
• 1 USB cable;
• EVB-LIV4F - Quick starting guide.
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EVB-LIV4F general presentation
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3 Interfaces
The EVB-LIV4F offers a different interface to the user:
• ON/OFF button;
• Reset button;
• µUSB use for interface with UART of EVB-LIV4F;
• Supply by USB (5 V);
• GNSS antenna input;
• LED indicators.
3.1 Power by USB
A micro USB connector (see the Figure 1) allows supplying the board identify in yellow bellow.
Figure 1. Power input
3.2 ON/OFF switch
Figure 2. ON/OFF switch
When button (see the Figure 2) is lifted if user presses the ON/OFF switch the board turn ON and power LED turn
on.
When ON/OFF switch is lifted, VBAT is connected to GND and the board is switched OFF.
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Interfaces
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3.3 Reset
A reset button (see the Figure 3) is present on front panel of case and it resets the Teseo-LIV4F module.
Figure 3. Reset button
3.4 LED indicators
The EVB-LIV4F offers two LED Indicators as shown below:
• The PWR red LED (see the Figure 4) indicator shows whether the unit is ON (led is turn on) or OFF (led is
turn off).
Figure 4. Power LED indicator
• The PPS green LED (see the Figure 5) indicator blinking every second and it indicates Teseo-LIV4F is up
and running.
Figure 5. PPS LED indicator
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Reset
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3.5 UART by USB
The UART interface (see the Figure 6) is provided via a USB connector.
Figure 6. USB/UART connector
The UART interface is used to trace NMEA messages and for upload binary file on the system.
Before using UART/USB bridge CP2104, you need to install the VCP driver. You can download it from the Silicon
Labs web page.
The virtual COM port (VCP) device drivers allow the CP2104 device on EVB-LIV4F to appear to the PC's
application software as a standard COM port. Application software running on the PC accesses the CP2104
device as it would access a standard hardware COM port configured as shown in the Table 1. However, actual
data transfer between the PC and the CP2104 device is performed over the USB interface as shown in the
following figure.
Figure 7. UART to USB path through converter
Table 1. UART configuration
Baud rate Data Bits Stop Bits Parity Handshake
115200 8 Bits 1 Bit - -
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UART by USB
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3.6 GNSS input antenna
The GNSS input (see the Figure 8) is available through a SMA female connector.
Figure 8. GNSS SMA antenna connector
The passive or active antenna can be used on EVB-LIV4F.
The DC power supply for active antenna is 3V3 with current limitation in case of short circuit.
Note: Use DC blocker for passive or simulator connected to EVB-LIV4F.
3.7 I2C and power connector interface
The 10-pins connector (CN302) provides I2C bus signal and power supply to evaluate current consumption as
shown in the Figure 9
Figure 9. I2C and power measure connector
Table 2. Connector pin-out description
Pin Connector signal Comment
1 VCC_IO 3V3 power supply
2 GND Ground connection
3 Module.Pin#5 -
4 Module.Pin#18 -
5 I2C_CLK I2C clock signal
6 I2C_SD I2C SDA signal
7 VBAT VBackup power supply
8 PM_VBAT VBackup measure point
9 VCC VCC power supply
10 PM_VCC VCC measure point
The four pins VCC_IO (#1), GND (#2), I2C_CLK (#5), I2C_SD (#6) allow connection of an external I2C-master-
device to the Teseo-LIV4F.
Teseo-LIV4F always acts as slave on I2C-bus.
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GNSS input antenna
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4 Current measurement process
To measure the current consumption of Teseo-LIV4F in the different operating mode, based on the pins
placement as shown in the Figure 10, follow these steps:
1. Connect a true-rms voltmeter to:
– Vcc (pin #9) and PM_VCC (pin #10)
– Vbat (pin #7) and PM_VBAT (pin #8)
2. Wait 15 minutes to download all GNSS orbital data.
3. Read the voltage (and average if necessary) the current value is done by following conversion:
– VCC → 1 mV equals 1 mA
– VBATT → 100 mV equals 1 mA
Figure 10. Pins placement in the current measurement connector
Note: Perform the test with good signals and clear sky view to ensure that the receiver can acquire the satellite
signals.
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Current measurement process
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5 Teseo-Suite connection
Download the Teseo-Suite from STMicroelectronics web site.
Install and start Teseo-Suite, and follow directions described in the following chapters.
5.1 Getting started with the Teseo-Suite
When the application starts, Teseo-Suite opens the Configuration Session panel, as shown in the Figure 11
below, to allow the user to add the EVB-LIV4F.
Then enter a session name to enable the Add Device button.
Figure 11. New session panel
If the Configuration Session panel is not opened, 2 ways either go to File menu and select New Session or click
the Edit Session Configuration button shown in the Figure 12.
Figure 12. Edit Session Configuration button
5.2 Add/delete device
In the Configuration Session panel, you can add/remove EVB-LIV4F devices in the work session and monitor
existing ones.
Pressing the button Add Device brings up the Configuration Device form, as shown in the Figure 13.
In the Configuration Device:
• Set the Hardware type with STA8090 value;
• Select the Control Port and choose the parameters of the serial connection as in the Table 1;
• On Control Port, the user can select the NMEA protocol;
• Press the OK button to create the device.
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Teseo-Suite connection
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Figure 13. Configuration Device panel
When selecting the port name, the Teseo-Suite provides an enumeration of all the COM ports available even if
these COM ports are already used by another application.
Note: The protocol of the device and its name cannot be changed once the OK button has been clicked.
To delete a device from the session, press the corresponding delete button in the Delete device column from the
Configuration Session form (see the following figure).
Figure 14. Configuration Session panel with one device added
The button Delete All removes all the devices of the current session.
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Add/delete device
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