Register Name
Hex Address
[Bit Field]
Function
HOLDEXIT_BW_SEL0
0x059B[6]
Select the exit bandwidth from Holdover when ramped exit is not
selected (HOLD_RAMP_BYP = 1).
00: Use Fastlock bandwidth on Holdover exit
01: Use Holdover Exit bandwidth on Holdover exit (default)
10, 11: Use Normal Loop bandwidth on Holdover exit
HOLDEXIT_BW_SEL1
0x052C[4]
Select the exit bandwidth from Holdover when ramped exit is not
selected (HOLD_RAMP_BYP = 1).
00: Use Fastlock bandwidth on Holdover exit
01: Use Holdover Exit bandwidth on Holdover exit (default)
10, 11: Use Normal Loop bandwidth on Holdover exit
RAMP_STEP_INTERVAL
0x052C[7:5]
Time Interval of the frequency ramp steps when ramping between
inputs or exiting holdover.
RAMP_STEP_SIZE
0x05A6[2:0]
Size of the frequency ramp steps when ramping between inputs
or exiting holdover.
2.6 VCO Freeze Mode
If holdover history is not valid, the DSPLL automatically enters VCO Freeze mode when the selected input clock becomes invalid and
no other valid input clocks are available for selection. The DSPLL uses the last measured input frequency to set the output frequencies
in the VCO Freeze mode. If an input clock becomes valid, the DSPLL automatically exits the VCO Freeze mode and re-acquires lock to
the new input clock.
Si5386 Rev. E Reference Manual • Modes of Operation
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
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Rev. 1.2 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • December 9, 2021
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