AD9954(Rev0) データシートの表示（PDF） - Analog Devices
部品番号
コンポーネント説明
メーカー
AD9954 Datasheet PDF : 36 Pages
| |||
AD9954
Table 7. Register Map—When Linear Sweep Enable Bit Is False (CFR1<21> = 0).
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)
Bit
Range
<7:0>
<15:8>
<23:16>
<31:24>
<7:0>
<15:8>
<23:16>
<7:0>
<15:8>
<7:0>
<7:0>
<15:8>
<23:16>
<31:24>
<7:0>
<15:8>
<7:0>
<15:8>
<23:16>
<31:24>
(MSB)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Digital
Power-
Down
Comp
Power-
Down
DAC
Power-
Down
Clock Input
Power-
Down
External
Power-
Down
Mode
Linear
Sweep No
Dwell
Load SRR
@ I/O UD
AutoClr
Freq.
Accum
AutoClr
Phase
Accum
Enable
SINE
Output
Clear
Freq
Accum.
Clear
Phase
Accum.
Automatic
Sync
Enable
Software
Manual
Sync
Linear
Sweep
Enable
Not Used Not Used Not Used
RAM
Enable
RAM
Dest. Is
Phase
Word
Internal Profile Control <2:0>
Load ARR
@ I/O UD
REFCLK Multiplier
0x00 or 0x01, or 0x02 or 0x03: Bypass Multiplier
VCO Range
0x04 to 0x14: 4× to 20× Multiplication
Not Used
High
Speed
Sync
Enable
Hardware
Manual
Sync
Enable
Not Used
Amplitude Scale Factor Register <7:0>
Bit 1
(LSB)
Bit 0
SYNC_CLK
Out
Disable
Not
Used
SDIO
Input
Only
LSB First
Not Used
Not
Used
OSK
Enable
Auto
OSK
Keying
Charge Pump Current
<1:0>
CRYSTAL
OUT Pin
Active
Not
Used
Auto Ramp Rate Speed
Control <1:0>
Amplitude Scale Factor Register <13:8>
Not Used<1:0>
Amplitude Ramp Rate Register <7:0>
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>
Default
Value
OR
Profile
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
Rev. 0 | Page 15 of 36
Share Link: 