Datasheet

Data Sheet AD9548
Rev. E | Page 61 of 112
Addr
Opt
Name
D7
D6
D5
D4
D3
D2
D1
D0
Def
0x0211 C Watchdog
timer
Watchdog timer (ms) [15:0] [up to 65.5 sec] 0x00
0x0212 C 0x00
0x0213 S DAC current DAC full-scale current [7:0] 0xFF
0x0214 S DAC
shutdown
Unused DAC full-scale current [9:8] 0x01
DPLL
0x0300 C Free running
frequency
tuning word
Free running frequency tuning word [47:0] 0x00
0x0301 C 0x00
0x 0302 C 0x00
0x0303 C 0x00
0x0304 C 0x00
0x0305 C 0x00
0x0306 A, C Update TW Unused Update TW 0x00
0x0307 C Pull-in
range limits
Pull-in range lower limit [23:0] 0x00
0x0308 C 0x00
0x0309 C 0x00
0x030A C Pull-in range upper limit [23:0] 0xFF
0x030B C 0xFF
0x030C C 0xFF
0x030D C Open loop
phase offset
DDS phase offset word [15:0] 0x00
0x030E C 0x00
0x030F C Closed loop
phase offset
Fixed phase lock offset [39:0] (picoseconds; signed) 0x00
0x0310 C 0x00
0x0311 C 0x00
0x0312 C 0x00
0x0313 C 0x00
0x0314 C Incremental phase lock offset step size [15:0]
(picoseconds)
0xE8
0x0315 C 0x03
0x0316 C Phase slew
limit
Phase slew rate limit [15:0] (ns/sec) 0x00
0x0317
C
0x00
0x0318 C History
accumulation
timer
History accumulation timer [23:0] (milliseconds) 0x30
0x0319 C 0x75
0x031A C 0x00
0x031B C History
mode
Unused Single
sample
fallback
Persistent
history
Incremental average [2:0] 0x00
Clock Distribution Output
0x0400 S Distribution
settings
Unused External
distribution
resistor
Receiver
mode
OUT3
power-
down
OUT2
power-
down
OUT1
power-
down
OUT0
power-
down
0x00
0x0401 S Distribution
enable
Unused OUT3
enable
OUT2
enable
OUT1
enable
OUT0
enable
0x00
0x0402 S Distribution
synchroniza-
tion
Unused Sync source [1:0] OUT3 sync
mask
OUT2
sync mask
OUT1
sync mask
OUT0
sync mask
0x00
0x0403 C Automatic
synchroniza-
tion
Unused Automatic sync mode [1:0] 0x00
0x0404 S Distribution
channel
modes
Unused OUT0
CMOS
phase
invert
OUT0
polarity
invert
OUT0
drive
strength
OUT0 mode 0x03
0x0405 S Unused OUT1
CMOS
phase
invert
OUT1
polarity
invert
OUT1
drive
strength
OUT1 mode 0x03
0x0406 S Unused OUT2
CMOS
phase
invert
OUT2
polarity
invert
OUT2
drive
strength
OUT2 mode 0x03
0x0407
S
Unused
OUT3
CMOS
phase
invert
OUT3
polarity
invert
OUT3
drive
strength
OUT3 mode
0x03