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STUW81300 датащи(PDF) 36 Page - STMicroelectronics

номер детали STUW81300
подробное описание детали  Wideband RF/microwave PLL fractional/integer frequency synthesizer with integrated VCOs and LDOs
PDF  63 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STUW81300 датащи(HTML) 36 Page - STMicroelectronics

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Circuit description
STuW81300
36/63
DS11314 Rev 7
7.16
STuW81300 register descriptions
ST0 Register
Address:
STuW81300BaseAddress + 0x00
Type:
R/W
Description:
Master register. N divider, CP current
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
765
4321
0
WRW
RW
RW RW
RW
[26]
VCO_CALB_DISABLE:
Must be set to ‘0’
1: disable the VCO calibrator (Note: this bit is of type write-only and cannot be read. A read operation
always returns 1)
[25:21] CP_SEL: set charge pump pulse current value (0 to 4.9 mA; step ~158
μA)
00000: (0) set ICP=0
00001: (1) set ICP=158 μA
00010: (2) set ICP=316 μA
11110: (30) set ICP=4.74 mA
11111: (31) set ICP=4.90 mA
[20:19] PFD_DEL: set PFD anti-backlash delay / down-split current value
00: (0) 1.2 ns / 0 A (default)
01: (1) 1.9 ns / 0.25*ICP
10: (2) 2.5 ns / 0.5*ICP
11: (3) 3.0 ns / 0.75*ICP
[18] RESERVED: must be set to ‘0’
[17] RESERVED: must be set to ‘0’
[16:0] N: Set integer part of N divider ratio (NINT)
For NINT ≥ 512, fractional mode is not allowed (FRAC and MOD settings are ignored)



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