Datasheet
AD9548 Data Sheet
Rev. E | Page 62 of 112
Addr
Opt
Name
D7
D6
D5
D4
D3
D2
D1
D0
Def
0x0408 S Distribution
channel
dividers
Q0 [23:0] 0x00
0x0409 S 0x00
0x040A S 0x00
0x040B S Unused Q0 [29:24] 0x00
0x040C S Q1 [23:0] 0x00
0x040D S 0x00
0x040E S 0x00
0x040F S Unused Q1 [29:24] 0x00
0x0410 S Q2 [23:0] 0x00
0x0411 S 0x00
0x0412 S 0x00
0x0413 S Unused Q2 [29:24] 0x00
0x0414 S Q3 [23:0] 0x00
0x0415 S 0x00
0x0416 S 0x00
0x0417 S Unused Q3 [29:24] 0x00
Reference Inputs
0x0500 S Reference
power-down
Ref DD
power-
down
Ref D
power-
down
Ref CC
power-
down
Ref C
power-
down
Ref BB
power-
down
Ref B
power-
down
Ref AA
power-
down
Ref A
power-
down
0x00
0x0501 S Reference
logic family
Ref BB logic family [1:0] Ref B logic family [1:0] Ref AA logic family [1:0] Ref A logic family [1:0] 0x00
0x0502 S Ref DD logic family [1:0] Ref D logic family [1:0] Ref CC Logic Family [1:0] Ref C Logic Family [1:0] 0x00
0x0503 C Manual
reference
profile
selection
Enable Ref
AA manual
profile
Ref AA manual profile [2:0] Enable Ref
A manual
profile
Ref A manual profile [2:0] 0x00
0x0504
C
Enable Ref
BB Manual
Profile
Ref BB manual profile [2:0]
Enable Ref B
manual
profile
Ref B manual profile [2:0]
0x00
0x0505
C
Enable Ref
CC Manual
Profile
Ref CC manual profile [2:0]
Enable Ref
C manual
profile
Ref C manual profile [2:0]
0x00
0x0506
C
Enable Ref
DD Manual
Profile
Ref DD manual profile [2:0]
Enable Ref
D manual
profile
Ref D manual profile [2:0]
0x00
0x0507 C Phase build-
out switching
Unused Phase master threshold priority [2:0] 0x00
Profile Registers—Profile 0
0x0600 Priorities Phase lock
scale
Unused Promoted priority [2:0] Selection priority [2:0] 0x00
0x0601 Reference
period
Nominal period (femtoseconds) [47:0] (up to 1.125 sec) 0x00
0x0602 0x00
0x0603 0x00
0x0604 0x00
0x0605 0x00
0x0606 0x00
0x0607 Unused Nominal period [49:48] 0x00
0x0608 Tolerance Inner tolerance (1/tolerance) [15:0] (removes fault status; 10% down to 1 ppm) 0x00
0x0609 0x00
0x060A Unused Inner tolerance [19:16] 0x00
0x060B Outer tolerance (1/tolerance) [15:0] (indicates fault status; 10% down to 1 ppm) 0x00
0x60C 0x00
0x060D Unused Outer tolerance [19:16] 0x00
0x060E Validation Validation timer (milliseconds) [15:0] (up to 65.5 sec) 0x00
0x060F 0x00
0x0610 Redetect
timeout
Redetect timer (milliseconds) [15:0] [up to 65.5 seconds] 0x00
0x0611 0x00