ST Teseo-LIV4F User Manual
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ST Teseo-LIV4F User Manual

ST Teseo-LIV4F User Manual

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UM3004
User manual
Teseo-LIV4F Hardware documentation
Introduction
Teseo-LIV4F is a GNSS modules sized 9.7 mm x 10.1 mm x 2.5 mm featuring STMicroelectronics positioning receiver TeseoIV.
It is a standalone positioning receiver which embeds the new ST GNSS positioning engine capable of receiving signals from
multiple satellite dual bands (L1 and L5) navigation systems, including GPS, Galileo and Glonass or BeiDou.
It embeds serial flash.
UM3004 - Rev 1 - March 2022
www.st.com
For further information contact your local STMicroelectronics sales office.

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Summary of Contents for ST Teseo-LIV4F

  • Page 1 Teseo-LIV4F Hardware documentation Introduction Teseo-LIV4F is a GNSS modules sized 9.7 mm x 10.1 mm x 2.5 mm featuring STMicroelectronics positioning receiver TeseoIV. It is a standalone positioning receiver which embeds the new ST GNSS positioning engine capable of receiving signals from multiple satellite dual bands (L1 and L5) navigation systems, including GPS, Galileo and Glonass or BeiDou.

  • Page 2: Pin Out

    UM3004 Pin out Pin out In the following figure, the pin out of the module: Figure 1. Pin out RF ground Reset GND RF RESETn Antenna connexion (50 Ω) Main supply RF IN RF ground GND RF Reserved Backup supply Reserved VBATT Antenna supply...

  • Page 3: Power

    VCC_RF is an output supply for external active antenna. The current is limited below 35 mA. Power supply design reference For first PCB, it is recommended to plan to have some filtering components on Teseo-LIV4F power supplies as follows: Figure 2.

  • Page 4: Current Consumption Optimization

    UM3004 Current consumption optimization Current consumption optimization To optimize battery current consumption, it is possible to use a SMPS at 1.8 V to supply VCC. Here is an application example with ST1S15J18R with an efficiency around 85%. Figure 3. Example of SMPS to improve current consumption MODE 2.3V –...

  • Page 5: Reserved (Pin 7, Pin 13 And Pin 15)

    UM3004 Reserved (pin 7, pin 13 and pin 15) Reserved (pin 7, pin 13 and pin 15) In Teseo-LIV4F pin 7, pin 13 and pin 15 are reserved. Let the pin floating. UM3004 - Rev 1 page 5/17...

  • Page 6: Interfaces

    UM3004 Interfaces Interfaces C (pin 16, pin 17) C is in slave only. Internal 4.7 kΩ pull-up resistor on VCC is present. It is important to avoid having other pull-up for current leakage in low power mode. UART (pin 2, pin 3) UART is Universal Asynchronous Receiver/Transmitter that supports much of the functionality of the industry- standard 16C650 UART.

  • Page 7: I/O Pins

    PPS (pin 4) PPS is the time pulse every one second. It can be configured with different condition of pulses. For firsts PCB, it is recommended to plan to have some filtering components on Teseo-LIV4F PPS (pin4 ). EXTINT (pin 5) It is a GPIO which, by default, is a trigger pin to external interrupt.

  • Page 8: Standby Mode

    It allows to have very low current consumption and fast GNSS reacquisition at the end of the standby time due to RTC. Teseo-LIV4F offers 1 way of standby: HW standby. As IO buffers are not supplied during standby mode, it is important to keep all IO without external voltage to avoid any current leakage.

  • Page 9: Front Ends Management

    RF input impedance is 50 Ω. Passive antenna A passive antenna can be directly connected to Teseo-LIV4F. Take care that the antenna must be close to the module. In addition, it could be possible that matching component must be necessary to match the antenna.

  • Page 10: External Lna

    External LNA External LNA means a passive antenna used with an LNA on the same PCB than Teseo-LIV4F module. There is built-in LNA and SAW in the GNSS module. It is recommended to use an LNA with gain less than 36 dB and noise figure less than 1.5 dB.

  • Page 11: Active Antenna

    UM3004 Active antenna Active antenna There is built-in LNA and SAW in the GNSS module. It is recommended to use an active antenna with gain less than 36 dB and noise figure less than 1.5 dB. The active antenna can be supplied directly via RF_IN supply. Figure 6.

  • Page 12: Layout Recommendations

    Layout recommendations Layout recommendations It is important to have a whole ground plane below Teseo-LIV4F module. Avoid any signals below Teseo-LIV4F. Do not place the module close to any EMI source, like antenna, RF routing, DC/DC or power conductor, clock signal or other high-frequency switching signal, etc.

  • Page 13: Revision History

    UM3004 Revision history Table 1. Document revision history Date Version Changes 22-Mar-2022 Initial release. UM3004 - Rev 1 page 13/17...

  • Page 14: Table Of Contents

    UM3004 Contents Contents Pin out ................2 Power .
  • Page 15 UM3004 List of tables List of tables Table 1. Document revision history ............. 13 UM3004 - Rev 1 page 15/17...
  • Page 16 UM3004 List of figures List of figures Figure 1. Pin out................2 Figure 2.
  • Page 17 ST’s terms and conditions of sale in place at the time of order acknowledgment. Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or the design of purchasers’...

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