DATA SHEET • SKY73121-11 VCO/SYNTHESIZER

Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com

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December 1, 2009 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 200888B

Table 8. DPLL Digital Control Bits

Serial Port Name

Load Register Word 1 Bit

Recommended Operating Value (Binary)

dpll_clk_dly(0)

2

0

dpll_clk_dly(1)

3

0

dpll_temp_comp(0)

4

0

dpll_temp_comp(1)

5

0

dpll_temp_comp(2)

6

0

dpll_temp_comp(3)

7

0

dpll_temp_comp(4)

8

0

dpll_temp_comp_en

9

0

dpll_ext_test(0)

10

0

dpll_ext_test(1)

11

0

dpll_ext_test(2)

12

0

dpll_ext_test(3)

13

0

dpll_ext_test(4)

14

0

dpll_ext_test(5)

15

0

dpll_ext_test(6)

16

0

dpll_ext_test(7)

17

0

dpll_flag_override

18

0

dpll_flag_value

19

0

S998

DC Power On

Hardware Auto Reset

Clear dpll_en

(Word 1, Bit [20])

Clear dpll_en

(Word 1, Bit [20])

Send Word 0, 1, 2, and 3

Send Word 1

Frequency Change

Set dpll_en

(Word 1, Bit [20])

Set dpll_en

(Word 1, Bit [20])

Lock on New Frequency

Send Only Changed

Words

Send Word 1

Lock on New Frequency

Figure 5. VCO Auto-Tuning Enable Process Flow Due to POR or Frequency Change