Skyworks Si5341 - Page 3

6.1.1 DCO with Frequency Increment/Decrement Pins/Bits ...............34
6.1.2 DCO with Direct Register Writes ......................34
6.2 Using the M Divider for DCO Applications .....................34
7. Dynamic PLL Changes........................... 35
7.1 Revisions B and A .............................35
7.2 Revision D ...............................35
7.3 Dynamic Changes to Output Frequencies without Changing PLL Settings ..........36
7.4 Dynamic Changes to Output Frequencies while Changing PLL Settings Using a CBPro Register
Map .................................36
8. Serial Interface.............................. 37
8.1 I
2
C Interface ...............................38
8.2 SPI Interface...............................40
9. Field Programming ............................ 44
10. Recommended Crystals and External Oscillators ................ 45
11. Crystal and Device Circuit Layout Recommendations............... 46
11.1 64-Pin QFN Si5341 Layout Recommendations ..................46
11.1.1 Si5341 Applications without a Crystal ....................46
11.1.2 Si5341 Crystal Layout Guidelines ......................47
11.1.3 Output Clocks ............................51
11.2 44-Pin QFN Si5340 Layout Recommendations ...................52
11.2.1 Si5340 Applications without a Crystal as the Reference Clock ............52
11.2.2 Si5340 Crystal Guidelines ........................53
12. Power Management ........................... 56
12.1 Power Management Features ........................56
12.2 Power Supply Recommendations .......................56
12.3 Grounding Vias .............................56
12.4 Power Supply Sequencing .........................57
13. Base vs. Factory Preprogrammed Devices ................... 58
13.1 “Base” Devices (Also Known as “Blank” Devices) ..................58
13.2 Factory Preprogrammed (Custom OPN) Devices ..................58
14. Register Map .............................. 59
14.1 Register Map Overview and Default Settings Values .................59
14.2 Si5341 Register Map ...........................59
14.2.1 Page 0 Registers Si5341.........................60
14.2.2 Page 1 Registers Si5341.........................69
14.2.3 Page 2 Registers Si5341.........................73
14.2.4 Page 3 Registers Si5341.........................79
14.2.5 Page 9 Registers Si5341.........................82
14.2.6 Page A Registers Si5341 ........................83
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3 Rev. 1.3 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • July 26, 2021 3