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STW81101ATR Datasheet(PDF) 28 Page - STMicroelectronics

Part # STW81101ATR
Description  Multi-band RF frequency synthesizer with integrated VCOs
PDF  42 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STW81101ATR Datasheet(HTML) 28 Page - STMicroelectronics

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I2C bus interface
STW81101
28/42
Pump, Prescaler Modulus) and all the bits of the "CALIBRATION" Register (05H)
set to '0'
b)
Program the "CALIBRATION" Register using a single-byte write sequence (sub-
address 05H) with the SERCAL bit set to '1'
The maximum allowed PFD frequency (fPFD) to perform the calibration process is 1 MHz; if
the desired fPFD is higher than 1MHz the following steps are needed:
–
Perform all the steps of the calibration procedure programming the desired VCO
frequency with a proper setting of R, B and A counter so that fPFD is ≤ 1MHz.
–
Program the device with the proper setting for the desired VCO and PFD
frequencies according to the above step a) only.



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