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TESEO-LIV3F Fiches technique(PDF) 16 Page - STMicroelectronics

No de pièce TESEO-LIV3F
Description  Tiny GNSS module
PDF  37 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TESEO-LIV3F Fiches technique(HTML) 16 Page - STMicroelectronics

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Clock generation
Teseo-LIV3F
16/37
DS12152 Rev 7
5
Clock generation
5.1
Temperature-Compensated Crystal Oscillator (TCXO)
Highly stable 26 MHz oscillator controls the down conversion process in RF block of the
Teseo-LIV3F. Characteristics of this component are important factors for higher sensitivity to
maximize performances especially in weak-signal environments, as well as to minimize
TTFF (Time To First Fix) and better navigation stability.
5.2
Real Time Clock (RTC)
This is an always-on power domain dedicated to RTC logic (backup system) with 32 Kbyte
SRAM and supplied with a dedicated voltage regulator.
The RTC provides a high resolution clock which can be used for GPS. It keeps the time
when the system is inactive and it’s internally used to wake up the system when in low
power mode. It has a clock trimming feature to compensate for the accuracy of the
32.768 kHz crystal and a secured time update.



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