Datasheet

Data Sheet AD9547
Rev. E | Page 83 of 104
Table 96. S Divider—Profile 1
1
Address
Bit
Bit Name
Description
0x0654
[7:0]
S
S, Bits[7:0].
0x0655 [7:0] S S, Bits[15:8].
0x0656
[7:4]
Unused
Unused.
[3:0] S S, Bits[19:16].
0x0657
[7:0]
Unused
Unused.
1
The value stored in the S divider register yields an actual divide ratio of one more than the programmed value. Furthermore, the value of S must be at least 7.
Table 97. Fractional Feedback Divider—Profile 1
Address
Bit
Bit Name
Description
0x0658
[7:0]
V
V, Bits[7:0].
0x0659 [7:4] U U, Bits[3:0].
[3:2]
Unused
Unused.
[1:0] V V, Bits[9:8].
0x065A
[7:6]
Unused
Unused.
[5:0] U U, Bits[9:4].
Table 98. Lock Detectors—Profile 1
Address
Bit
Bit Name
Description
0x065B [7:0] Phase lock threshold (units determined by Register 0x0632[7]) Phase lock threshold, Bits[7:0].
0x065C
[7:0]
Phase lock threshold, Bits[15:8].
0x065D
[7:0]
Phase lock fill rate
Phase lock fill rate, Bits[7:0].
0x065E
[7:0]
Phase lock drain rate
Phase lock drain rate, Bits[7:0].
0x065F [7:0] Frequency lock threshold(expressed in units of ps) Frequency lock threshold, Bits[7:0].
0x0660
[7:0]
Frequency lock threshold, Bits[15:8].
0x0661 [7:0] Frequency lock threshold, Bits[23:16].
0x0662
[7:0]
Frequency lock fill rate
Frequency lock fill rate, Bits[7:0].
0x0663
[7:0]
Frequency lock drain rate
Frequency lock drain rate, Bits[7:0].
0x0664 to 0x067F [7:0] Unused Unused.
Register 0x0680 to Register 0x06B1—Profile 2
Table 99. Priorities—Profile 2
Address
Bit
Bit Name
Description
0x0680
[7]
Phase lock scale
Controls the phase lock threshold unit scaling.
0 = picoseconds.
1 = nanoseconds.
[6] Unused Unused.
[5:3]
Promoted priority
User assigned priority level (0 to 7) of the reference associated with Profile 2 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 2, which
ranks that reference relative to the others.
Table 100. Reference Period—Profile 2
Address
Bit
Bit Name
Description
0x0681
[7:0]
Reference period (expressed in units of fs)
Nominal reference period, Bits[7:0].
0x0682
[7:0]
Nominal reference period, Bits[15:8].
0x0683
[7:0]
Nominal reference period, Bits[23:16].
0x0684 [7:0] Nominal reference period, Bits[31:24].
0x0685
[7:0]
Nominal reference period, Bits[39:32].
0x0686 [7:0] Unused Unused. Write 0s to these bits.
0x0687
[7:0]