SI5338M-A-GMR Silicon Laboratories Inc, SI5338M-A-GMR Datasheet - Page 21

• Manufacturer Part Number: SI5338M-A-GMR
• Manufacturer: Silicon Laboratories Inc

Input clocks are
validated with the
LOS alarms. See
Register 218 to
determine which LOS
should be monitored
Use ClockBuilder
Desktop v2.7 or later
PLL is locked when
PLL_LOL, SYS_CAL, and
all other alarms are
cleared
Register
Map
Figure 9. I
accounting for the write-allowed mask
Set FCAL_OVRD_EN = 0; reg49[7]
Set FCAL_OVRD_EN = 1; reg49[7]
Set SOFT_RESET = 1; reg246[1]
2
Write new configuration to device
C Programming Procedure
Set OEB_ALL = 1; reg230[4]
Set OEB_ALL = 0; reg230[4]
Set PLL to use FCAL values
Set DIS_LOL = 1; reg241[7]
Set DIS_LOL = 0; reg241[7]
Validate input clock status
Configure PLL for locking
Confirm PLL lock status
Initiate Locking of PLL
Copy FCAL values to
Is input clock valid?
(See Section 6.1)
Rev. 0.6
Disable Outputs
Enable Outputs
active registers
Is PLL locked?
Restart LOL
Pause LOL
Wait 25 ms
YES
YES
Copy registers as follows:
237[1:0] to 47[1:0]
236[7:0] to 46[7:0]
235[7:0] to 45[7:0]
Set 47[7:2] = 000101b
NO
NO
Si5338
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