Datasheet

AD9953
Rev. A | Page 14 of 32
able 5. Register Map
s)
it
ange
SB)
it 7 it 6 it 5 it 3 it 2 it 1
SB)
it 0
Default
Value
T
Register
Name
(Serial
Addres
B
R
(M
B B B Bit 4 B B B
(L
B
OR
Profile
Control
Function
<7:0>
ital
Power-
p
Power- Power-
Input
Power-
r-
ar
Sweep No
CLK
Out
Used
Register
No.1
(CFR1)
(0x00)
Dig
Down
Com
Down
DAC
Down
Clock
Down
External
Powe
Down
Mode
Line
Dwell
SYNC_
Disable
Not
0x00
<15:8>
L
@ I/O UD
A A
LSB First
0x00
oad SRR
AutoClr
Freq.
Accum.
AutoClr
Phase
Accum.
Enable
SINE
Output
Clear
Freq.
ccum.
Clear
Phase
ccum.
SDIO
Input
Only
<23:16>
S
N N N N d
Not
Used
0x00
Automatic
Sync
Enable
oftware
Manual
Sync
Linear
Sweep
Enable
ot Used ot Used ot Used ot Use
<31:24>
Enable
D
nal Profile Control <2:0>
Load ARR
@ I/O UD
OSK
Enable
OSK
Keying
0x00
RAM
RAM
est. Is
Phase
Word
Inter
Auto
Control
Function
N
<7:0>
0x00 or 0x01, or 0x02 or 0x03: Bypass Multiplier
0x04 to 0x14: 4× to 20× Multiplication
VCO Range
Charge Pump
<1:0>
0x00
Register
o. 2 (CFR2)
(0x01)
REFCLK Multiplier
Current
<15:8> Not Used
High
Speed Manual
CRYSTA
OUT Pin
Not
Used
0x00
Sync
Enable
Hardware
Sync
Enable
L
Active
<23:16> Not Used 0x18
Amplitude
Scale Factor
<7:0> Amplitude Scale Facto r <7: 0x00
(ASF)
(0x02)
r Registe 0>
<15:8>
Auto Ramp Rate Speed
Control <1:0>
Amplitude Scale Factor Register <13:8>
0x00
Amplitude
Ra e
<7:0> Amplitude Ramp Rate Register <7:0>
0x00
mp Rat
(ARR)
(0x03)
Fr y
<7:0> Frequency Tuning Word No. 0 <7:0> 0x00
equenc
Tuning
Word
(FTW0)
(0x04)
<15:8> Frequency Tuning Word No. 0 <15:8> 0x00
<23:16> F requency Tuning Word No. 0 <23:16> 0x00
<31:24> Frequency Tuning Word No. 0 <31:24>
0x00
Phase
fset WorOf d
(POW0)
(0x05)
<7:0> Phase Offset Word No. 0 <7:0> 0x00
<15:8> Not Used<1:0> No. 0 <13:8> Phase Offset Word
0x00
F
Frequency Tun 0x00
requency
Tuning
Word
(FTW1)
(0x06)
<7:0> ing Word No. 1 <7:0>
<15:8> Frequency Tuning Word No. 1 <15:8> 0x00
<23:16> F requency Tuning Word No. 1 <23:16> 0x00
<31:24>
Frequency Tuning Word No. 1 <31:24> 0x00