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STUW81300 Datasheet(PDF) 39 Page - STMicroelectronics

No. de pieza STUW81300
Descripción Electrónicos  Wideband RF/microwave PLL fractional/integer frequency synthesizer with integrated VCOs and LDOs
PDF  63 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STUW81300 Datasheet(HTML) 39 Page - STMicroelectronics

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DS11314 Rev 7
39/63
STuW81300
Circuit description
58
ST3 Register
Address:
STuW81300BaseAddress + 0x03
Type:
R/W
Applicability:
Double buffered (based upon DBR bit setting)
Description:
R divider, CP leakage, CP down-split pulse, Ref. Path selection, Device power down
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54321
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RW RW RW
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[26] DBR: Double buffering bit enable; at ‘1’ the register is buffered and transferred only once the master
register ST0 is written
[25] PD: device power down; at ‘1’ put OFF all blocks (except LDOs)
[24] CP_LEAK_x2: double Charge Pump leakage current bit
0: set standard leakage current (10 µA step)
1: set doubled leakage current (20 µA step)
[23:19] CP_LEAK: Set Charge Pump leakage current value (0 to 620
μA; step 10 μA or 20 μA base upon
CP_LEAK_x2 setting)
00000: (0) set ILEAK = 0 (default)
00001: (1) set ILEAK = 10 μA (ILEAK = 20 μA if CP_LEAK_x2 = 1)
00010: (2) set ILEAK = 20 μA (ILEAK = 40 μA if CP_LEAK_x2 = 1)
11110: (30) set ILEAK = 300 μA (ILEAK = 600 μA if CP_LEAK_x2 = 1)
11111: (31) set ILEAK = 310 μA (ILEAK = 620 μA if CP_LEAK_x2 = 1)
[18] CP_LEAK_DIR: set direction of the leakage current
0: set down-leakage (current sink)
1: set up-leakage (current source)
[17] DNSPLIT_EN: at ‘1’ enables down-split pulse current; current level set by PFD_DEL[1:0] in register ST0



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