10 dds0 register – 0x9 – amplitude scale factor, 11 dds0 register – 0xa – amplitude ramp rate, 12 dds0 register – 0xb – frequency tuning word 0 – Sundance SMT399-160 User Manual
Page 25: Dds0 register – 0x9 – amplitude scale factor, Dds0 register – 0xa – amplitude ramp rate, Dds0 register – 0xb – frequency tuning word 0
5.4.10 DDS0 Register – 0x9 – Amplitude Scale Factor.
For more details, refer to AD9954 datasheet.
DDS0 Register – 0x9 – Amplitude Scale Factor
Byte
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0
Amplitude Scale Factor Register[7:0]
Default
‘00000000’
1
Auto Ramp Rate Speed
Amplitude Scale Factor Register[13:8]
Default
‘00’ ‘000000’
DDS0 Register – 0x9 – Amplitude Scale Factor
Setting
Auto Ramp
Rate Speed
(Bit 15-14)
Description
0
0
Tell the OSK block how many amplitude steps to each increase.
DDS0 Register – 0x9 – Amplitude Scale Factor
Setting
Amplitude
Scale
Factor
(Bit 13-0)
Description
Programs the maximum value achievable by the OSK.
5.4.11 DDS0 Register – 0xA – Amplitude Ramp Rate.
For more details, refer to AD9954 datasheet.
DDS0 Register – 0xA – Amplitude Ramp Rate
Byte
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0
Amplitude Ramp Rate
Default
‘00000000’
DDS0 Register – 0xA – Amplitude Ramp Rate
Setting
Amplitude
Ramp
Rate (Bit
7-0)
Description
The 8-bit amplitude ramp rate used in the auto OSK mode.
5.4.12 DDS0 Register – 0xB – Frequency Tuning Word 0.
For more details, refer to AD9954 datasheet.
DDS0 Register – 0xB – Frequency Tuning Word 0
Byte
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0
Frequency Tuning Word 0[7:0]
Default
‘00000000’
1
Frequency Tuning Word 0[15:8]
Default
‘00000000’
User Manual SMT399-160
Page 25 of 39
Last Edited: 24/05/2007 17:12:00