AD9954(Rev0) データシートの表示（PDF） - Analog Devices
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AD9954 Datasheet PDF : 36 Pages
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AD9954
Table 8. Register Map–When Linear Sweep Enable Bit Is True (CFR1<21> = 1).
Note that the RAM enable Bit CFR1<31> only activates the RAM itself not the RAM segment control words.
Register
Name
(Serial
Address)
Control
Function
Register No.
1 (CFR1)
(0x00)
Control
Function
Register No.
2 (CFR2)
(0x01)
Amplitude
Scale Factor
(ASF) (0x02)
Amplitude
Ramp Rate
(ARR) (0x03)
Frequency
Tuning
Word
(FTW0)
(0x04)
Phase Offset
Word
(POW0)
(0x05)
Frequency
Tuning
Word
(FTW1)
(0x06)
Negative
Linear
Sweep
Control
Word
(NLSCW)
(0x07)
Bit Range
<7:0>
<15:8>
<23:16>
<31:24>
<7:0>
<15:8>
<23:16>
<7:0>
(0x07)
<15:8>
<7:0>
<7:0>
<15:8>
<23:16>
<31:24>
<7:0>
<15:8>
<7:0>
<15:8>
<23:16>
<31:24>
<7:0>
<15:8>
<23:16>
<31:24>
<39:32>
(MSB)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Digital
Power-
Down
Comp
Power-
Down
DAC
Power-
Down
Clock
Input
Power
Dwn
External
Power-
Down
Mode
Load SRR
@ I/O UD
AutoClr
Freq.
Accum
AutoClr
Phase
Accum
Enable
SINE
Output
Clear
Freq
Accum.
Automatic
Sync
Enable
Software
Manual
Sync
Linear
Sweep
Enable
Not Used
Not
Used
RAM
Enable
RAM
Dest. Is
Phase
Word
Internal Profile Control <2:0>
REFCLK Multiplier
0x00 or 0x1 or 0x02 or 0x03: Bypass Multiplier
0x04 to 0x14: 4× to 20× Multiplication
Not Used
High
Speed
Sync
Enable
Not Used
Bit 2
CRYSTAL
OUT Pin
Active
Clear
Phase
Accum.
Not Used
Load ARR
@ I/O UD
VCO
Range
Hardware
Manual
Sync
Enable
Bit 1
(LSB)
Bit 0
SYNC_CLK
Out
Disable
Not
Used
SDIO
Input
Only
LSB First
Not Used
Not
Used
Output
Shaped
Keying
Enable
Auto
Output
Shaped
Keying
Charge Pump Current
<1:0>
CRYSTAL
OUT Pin
Active
Not
Used
Amplitude Scale Factor Register <7:0>
Auto Ramp Rate
Speed Control <1:0>
Amplitude Scale Factor Register <13:8>
Amplitude Ramp Rate Register <7:0>
Open<1:0>
Frequency Tuning Word No. 0 <7:0>
Frequency Tuning Word No. 0 <15:8>
Frequency Tuning Word No. 0 <23:16>
Frequency Tuning Word No. 0 <31:24>
Phase Offset Word No. 0 <7:0>
Phase Offset Word No. 0 <13:8>
Frequency Tuning Word No. 1 <7:0>
Frequency Tuning Word No. 1 <15:8>
Frequency Tuning Word No. 1 <23:16>
Frequency Tuning Word No. 1 <31:24>
Falling Delta Frequency Tuning Word <7:0>
Falling Delta Frequency Tuning Word <15:8>
Falling Delta Frequency Tuning Word <23:16>
Falling Delta Frequency Tuning Word <31:24>
Falling Sweep Ramp Rate Word <7:0>
Default
Value
OR
Profile
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
PS0 = 0
PS0 = 0
PS0 = 0
PS0 = 0
PS0 = 0
Rev. 0 | Page 17 of 36
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