Datasheet

Data Sheet AD9548
Rev. E | Page 85 of 112
Table 87. Fractional Feedback Divider—Profile 0
Address Bits Bit Name Description
0x0626 [7:0] V V, Bits[7:0]
0x0627 [7:4] U U, Bits[3:0]
[3:2] Unused
[1:0] V V, Bits[9:8]
0x0628 [7:6] Unused
[5:0] U U, Bits[9:4]
Table 88. Lock Detectors—Profile 0
Address Bits Bit Name Description
0x0629 [7:0] Phase lock threshold
(units determined by
Register 0x0600[7])
Phase lock threshold, Bits[7:0]
0x062A [7:0] Phase lock threshold, Bits[15:8]
0x062B [7:0] Phase lock fill rate Phase lock fill rate, Bits[7:0]
0x062C [7:0] Phase lock drain rate Phase lock drain rate, Bits[7:0]
0x062D [7:0] Frequency lock
thresh-old (in
picoseconds)
Frequency lock threshold, Bits[7:0]
0x062E [7:0] Frequency lock threshold, Bits[15:8]
0x062F [7:0] Frequency lock threshold, Bits[23:16]
0x0630 [7:0] Frequency lock fill rate Frequency lock fill rate, Bits[7:0]
0x0631 [7:0] Frequency lock drain
rate
Frequency lock drain rate, Bits[7:0]
Register 0x0632 to Register 0x067F—Profile 1
Table 89. Priorities—Profile 1
Address Bits Bit Name Description
0x0632 [7] Phase lock scale Controls the phase lock threshold unit scaling.
0 = picoseconds.
1 = nanoseconds.
[6] unused
[5:3] Promoted priority User assigned priority level (0 to 7) of the reference associated with Profile 1 while
that reference is the active reference. The numeric value of the promoted priority
must be less than or equal to the numeric value of the selection priority.
[2:0] Selection priority User assigned priority level (0 to 7) of the reference associated with Profile 1, which
ranks that reference relative to the others.
Table 90. Reference Period—Profile 1
Address Bits Bit Name Description
0x0633 [7:0] Reference period (in
femtoseconds)
Nominal reference period, Bits[7:0]
0x634 [7:0] Nominal reference period, Bits[15:8]
0x0635 [7:0] Nominal reference period, Bits[23:16]
0x0636
[7:0]
Nominal reference period, Bits[31:24]
0x0637 [7:0] Nominal reference period, Bits[39:32]
0x0638 [7:0] Nominal reference period, Bits[47:40]
0x0639 [7:2] Unused
[1:0] Reference period Nominal reference period, Bits[49:48]