AD9547 datasheet(83/106 Pages) AD

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Data Sheet

AD9547

Table 87. Fractional Feedback Divider—Profile 0

Address

Bit

Bit Name

Description

0x0626

[7:0]

V, Bits[7:0].

0x0627

[7:4]

U, Bits[3:0].

[3:2]

Unused

Unused.

[1:0]

V, Bits[9:8].

0x0628

[7:6]

Unused

Unused.

[5:0]

U, Bits[9:4].

Table 88. Lock Detectors—Profile 0

Address

Bit

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 threshold (expressed in units of ps)

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].

Table 89. Priorities—Profile 1

Address

Bit

Bit Name

Description

0x0632

[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 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

Bit

Bit Name

Description

0x0633

[7:0]

Reference period (expressed in units of fs)

Nominal reference period, Bits[7:0].

0x0634

[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]

Unused

Unused. Write 0s to these bits.

0x0639

[7:0]

Table 91. Tolerance—Profile 1

Address

Bit

Bit Name

Description

0x063A

[7:0]

Inner tolerance

Inner tolerance, Bits[7:0].

0x063B

[7:0]

Inner tolerance, Bits[15:8].

0x063C

[7:4]

Unused

Unused.

[3:0]

Inner tolerance

Inner tolerance, Bits[19:16].

0x063D

[7:0]

Outer tolerance

Outer tolerance, Bits[7:0].

0x063E

[7:0]

Outer tolerance, Bits[15:8].

Rev. G | Page 83 of 106

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