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udilevy
Visitor II
Jun 14, 2022 4:59 PM UTC
Question

I would like to carify something regarding the STM32WL55. it is recomended to use a TCXO connected to PB0 as a supply, since PB0 can adjust the suppply to change the frequency, however, in this case shouldn't I use a VCTCXO? (Voltage Controlled TCXO)

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2 replies

Tesla DeLorean
Guru
Jun 14, 2022 5:51 PM UTC

POWERs it (couple of mA), not TUNE it

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Benoit MARCHAND
ST Employee
Jun 15, 2022 11:56 AM UTC

Hello,

TCXO includes an oscillator which needs to be supplied. Voltage range is used to support a wide range of TCXO. Inside a given range, the voltage will not modify the frequency.

BR,

Benoit