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STW81101ATR 데이터시트(PDF) 35 Page - STMicroelectronics

부품명 STW81101ATR
상세설명  Multi-band RF frequency synthesizer with integrated VCOs
PDF  48 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STW81101ATR 데이터시트(HTML) 35 Page - STMicroelectronics

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STW81101
SPI digital interface
35/48
7.3
Bit tables
Table 21.
Bits at 00h and ST1
Serial interface address = 00h
Register name = ST1
Bit
Name
Description
[23]
R9
Reference clock divider ratio
[22]
R8
[21]
R7
[20]
R6
[19]
R5
[18]
R4
[17]
R3
[16]
R2
[15]
R1
[14]
R0
[13]
PLL_A1
VCO amplitude control
[12]
PLL_A0
[11]
CPSEL2
Charge pump output current control
[10]
CPSEL1
[9]
CPSEL0
[8]
PSC_SEL
Prescaler modulus select (0 for P=16, 1 for P=19)
[7]
INITCAL
For test purposes only; must be set to 0
[6]
SERCAL
Enable VCO calibration (see
Section 7.4)
[5]
SELEXTCAL
For test purposes only; must be set to 0
[4]
CAL4
For test purposes only; must be set to 0
[3]
CAL3
[2]
CAL2
[1]
CAL1
[0]
CAL0



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