SKY73121-11 Datasheet, PDF (6/22 Pages) Skyworks Solutions Inc. – 1805 - 1890 MHz High Performance VCO/Synthesizer With Integrated Switch

DATA SHEET • SKY73121-11 VCO/SYNTHESIZER
Table 4. Load Register Word 0 (Programs the Operation Mode Register) (2 of 2)
Parameter
Function
State Description
test_mux
rsvd
pre_curr_sel
prescale_sel
rsvd
Lock detect and diagnostic output select
[17:15]
Reserved [20:18]
Prescaler current bias [22:21]
Prescaler mode select [23]
Reserved [25:24]
Bits [17:15]:
0 0 0 = Lock detect output
0 0 1 = R-divider output
0 1 0 = N-divider output
0 1 1 = Not used
1 0 0 = Not used
1 0 1 = Not used
1 1 0 = Not used
1 1 1 = DPLL test
Reserved
Bits [22:21]:
0 0 = 20 PA
0 1 = 22 PA
1 0 = 24 PA
1 1 = 26 PA
Bit [23]:
0 = Prescaler in 8/9 divide mode
1 = Prescaler in 16/17 divide mode
Reserved
Table 5. Load Register Word 1 (Programs the Auto Calibration Control Register)
Parameter
Function
State Description
wd_0, wd_1
dpll_ctrl
dpll_en
rsvd
Address bits [1:0]. Must be set to 01b (see
Table 3)
DPLL control [19:2]
Digital PLL enable flag [20]
Reserved [25:21]
Refer to Table 8
0 = Disable DPLL
1 = Enable DPLL
Reserved
Table 6. Load Register Word 2 (Programs the Frequency Control 1 Register) (1 of 2)
Parameter
Function
State Description
wd_0, wd_1
rdiv
rsvd
Address bits [1:0]. Must be set to 10b (see
Table 3)
Reference divider ratio [3:2]
Reserved [5:4]
Bits [3:2]:
00=8
01=4
10=2
11=1
Reserved
Recommended
Operational Value
(Binary)
000
000
00
Application
dependent
00
Recommended
Operational Value
(Binary)
01
–
Refer to Figure 5
00000
Recommended
Operational Value
(Binary)
10
Application
dependent
–
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
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December 1, 2009 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 200888B