Datasheet

AD9547 Data Sheet
Rev. E | Page 64 of 104
Addr Opt
1
Name D7 D6 D5 D4 D3 D2 D1 D0 Def
0x069E R divider R[23:0] 0x00
0x069F
0x00
0x06A0
0x00
0x06A1 Unused R[29:24] 0x00
0x06A2
S divider
S[15:0]
0x00
0x06A3
0x00
0x06A4 Unused S[19:16] 0x00
0x06A5
Unused
0x00
0x06A6 Fractional
feedback
divider
V[7:0] 0x00
0x06A7 U[3:0] Unused V[9:8] 0x00
0x06A8
Unused
U[9:4]
0x00
0x06A9
Lock
detectors
Phase lock threshold[15:0] (in ps)
0x00
0x06AA 0x00
0x06AB
Phase lock fill rate[7:0]
0x00
0x06AC
Phase lock drain rate[7:0]
0x00
0x06AD Frequency lock threshold[23:0] (in ps) 0x00
0x06AE
0x00
0x06AF
0x00
0x06B0 Frequency lock fill rate[7:0] 0x00
0x06B1
Frequency lock drain rate[7:0]
0x00
Profile registers—Profile 3
0x06B2
Priorities
Phase lock
scale
Unused
Promoted priority[2:0]
Selection priority[2:0]
0x00
0x06B3 Reference
period
Nominal period[39:0] (in fs up to 1.1 ms) 0x00
0x06B4 0x00
0x06B5
0x00
0x06B6
0x00
0x06B7 0x00
0x06B8
Unused (write 0s to these bits)
0x00
0x06B9
0x00
0x06BA Tolerance Inner tolerance[15:0] (1/tolerance) (removes fault status; 10% down to 1 ppm) 0x00
0x06BB
0x00
0x06BC Unused Inner tolerance[19:16] 0x00
0x06BD Outer tolerance[15:0] (1/tolerance) (indicates fault status; 10% down to 1 ppm) 0x00
0x06BE
0x00
0x06BF
Unused
Outer tolerance[19:16]
0x00
0x06C0 Validation
timer
Validation timer[15:0] (in ms up to 65,535 ms) 0x00
0x06C1
0x00
0x06C2
Redetect
timer
Redetect timer[15:0] (in ms up to 65,535 ms)
0x00
0x06C3 0x00
0x06C4
Digital loop
filter coeffi-
cients
Alpha-0 linear[15:0]
0x00
0x06C5
0x00
0x06C6 Alpha-2 exponent[1:0] Alpha-1 exponent[5:0] 0x00
0x06C7
Beta-0 linear[6:0]
Alpha-2 ex-
ponent[2]
0x00
0x06C8 Beta-0 linear[14:7] 0x00
0x06C9
Unused
Beta-1 exponent[4:0]
Beta-0 linear [16:15]
0x00
0x06CA Gamma-0 linear[15:0] 0x00
0x06CB 0x00
0x06CC
Unused
Gamma-1 exponent[4:0]
Gamma-0
linear[16]
0x00
0x06CD
Delta-0 linear[7:0]
0x00
0x06CE
Delta-1 ex-
ponent[0]
Delta-0 linear[14:8]
0x00
0x06CF Alpha-3 exponent[3:0] Delta-1 exponent[4:1] 0x00
0x06D0 R divider R[23:0] 0x00
0x06D1
0x00
0x06D2
0x00
0x06D3 Unused R[29:24] 0x00