Clock generation

Teseo-LIV3R

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DS12821 Rev 2

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-LIV3R. Characteristics of this component are important factors for higher sensitivity

to maximize performance especially in weak-signal environments, as well as to minimize

TTFF (Time To First Fix) and improve navigation stability.

5.2

Real Time Clock (RTC)

This is an always-on power domain dedicated to RTC logic (backup system) with 32 KB

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 is 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.