Datasheet

AD9957 Data Sheet
Rev. C | Page 52 of 64
Table 15. Profile 1, Profile 2, and Profile 3 Registers
Register
Name
(Serial
Address)
Bit Range
(Internal
Address)
Bit 7
(MSB) Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1
Bit 0
(LSB)
Default
Value
Profile 1
Register—
Single Tone
(0x0F)
<63:56> Open Amplitude Scale Factor<13:8> 0x00
<55:48> Amplitude Scale Factor<7:0> 0x00
<47:40> Phase Offset Word<15:8> 0x00
<39:32> Phase Offset Word<7:0> 0x00
<31:24> Frequency Tuning Word<31:24> 0x00
<23:16> Frequency Tuning Word<23:16> 0x00
<15:8> Frequency Tuning Word<15:8> 0x00
<7:0> Frequency Tuning Word<7:0> 0x00
Profile 1
Register—
QDUC (0x0F)
<63:56> CCI Interpolation Rate<7:2> Spectral
Invert
Inverse CCI
Bypass
0x00
<55:48> Output Scale Factor<7:0> 0x00
<47:40> Phase Offset Word<15:8> 0x00
<39:32> Phase Offset Word<7:0> 0x00
<31:24>
Frequency Tuning Word<31:24>
0x00
<23:16> Frequency Tuning Word<23:16> 0x00
<15:8> Frequency Tuning Word<15:8> 0x00
<7:0> Frequency Tuning Word<7:0> 0x00
Profile 2
Register—
Single Tone
(0x10)
<63:56> Open Amplitude Scale Factor<13:8> 0x00
<55:48> Amplitude Scale Factor<7:0> 0x00
<47:40> Phase Offset Word<15:8> 0x00
<39:32> Phase Offset Word<7:0> 0x00
<31:24> Frequency Tuning Word<31:24> 0x00
<23:16> Frequency Tuning Word<23:16> 0x00
<15:8> Frequency Tuning Word<15:8> 0x00
<7:0> Frequency Tuning Word<7:0> 0x00
Profile 2
Register—
QDUC (0x10)
<63:56> CCI Interpolation Rate<7:2> Spectral
Invert
Inverse CCI
Bypass
0x00
<55:48> Output Scale Factor<7:0> 0x00
<47:40> Phase Offset Word<15:8> 0x00
<39:32> Phase Offset Word<7:0> 0x00
<31:24> Frequency Tuning Word<31:24> 0x00
<23:16> Frequency Tuning Word<23:16> 0x00
<15:8> Frequency Tuning Word<15:8> 0x00
<7:0> Frequency Tuning Word<7:0> 0x00
Profile 3
Register—
Single Tone
(0x11)
<63:56> Open Amplitude Scale Factor<13:8> 0x00
<55:48>
Amplitude Scale Factor<7:0>
0x00
<47:40> Phase Offset Word<15:8> 0x00
<39:32> Phase Offset Word<7:0> 0x00
<31:24> Frequency Tuning Word<31:24> 0x00
<23:16> Frequency Tuning Word<23:16> 0x00
<15:8> Frequency Tuning Word<15:8> 0x00
<7:0> Frequency Tuning Word<7:0> 0x00
Profile 3
Register—
QDUC
(0x11)
<63:56> CCI Interpolation Rate<7:2> Spectral
Invert
Inverse CCI
Bypass
0x00
<55:48> Output Scale Factor<7:0> 0x00
<47:40> Phase Offset Word<15:8> 0x00
<39:32> Phase Offset Word<7:0> 0x00
<31:24> Frequency Tuning Word<31:24> 0x00
<23:16>
Frequency Tuning Word<23:16>
0x00
<15:8> Frequency Tuning Word<15:8> 0x00
<7:0> Frequency Tuning Word<7:0> 0x00