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參數(shù)資料
型號(hào)： AD9910BSVZ-REEL
廠(chǎng)商： ANALOG DEVICES INC
元件分類(lèi)： DAC
英文描述： 1 GSPS, 14-Bit, 3.3 V CMOS Direct Digital Synthesizer
中文描述： SERIAL, PARALLEL, WORD INPUT LOADING, 14-BIT DAC, PDSO100
封裝： ROHS COMPLIANT, MS-026AED-HD, TQFP-100
文件頁(yè)數(shù)： 59/60頁(yè)
文件大?。?/td> 764K
代理商： AD9910BSVZ-REEL
AD9910
Rev. 0 | Page 59 of 60
Profile Registers
There are eight consecutive serial I/O addresses (Address 0x0E
to Address 0x015) dedicated to device profiles. All eight profile
registers are either single tone profiles or RAM profiles. RAM
profiles are in effect when CFR1<31> = 1. Single tone profiles
are in effect when CFR1<31> = 0, CFR2<19> = 0, and CFR2<4>
= 0. In normal operation, the active profile register is selected
using the external PROFILE<2:0> pins. However, in the specific
case when CFR1<31> = 1 and CFR1<20:17> ≠ 0000
2
, the active
profile is selected automatically (see the RAM Ramp Up
Internal Profile Control Mode section).
Profile 0 to Profile 7—Single Tone Register
Address 0x0E to Address 0x15, 8 bytes are assigned to this register.
Table 29. Bit Descriptions for Profile 0 to Profile 7 Single Tone Register
Bit(s)
Descriptor
63:62
Not Available
61:48
Amplitude Scale Factor
47:32
Phase Offset Word
31:0
Frequency Tuning Word
Profile 0 to Profile 7—RAM Register
Address 0x0E to Address 0x15, 8 bytes are assigned to this register.
Explanation
This 14-bit number controls the DDS output amplitude.
This 16-bit number controls the DDS phase offset.
This 32-bit number controls the DDS frequency.
Table 30. Bit Descriptions for Profile 0 to Profile 7 RAM Register
Bit(s)
Descriptor
63:56
Not Available
55:40
Address Step Rate
39:30
Waveform End Address
29:24
Not Available
23:14
Waveform Start Address
13:6
Not Available
5
No-Dwell High
Explanation
16-bit address step rate value.
10-bit waveform end address.
10-bit waveform start address.
Effective only when the RAM mode is in ramp up.
0 = when the RAM state machine reaches the end address, it halts.
1 = when the RAM state machines reaches the end address, it jumps to the start address
and halts.
Effective only when in RAM mode, direct switch.
0 = zero-crossing function disabled.
1 = zero-crossing function enabled.
See Table 13 for details.
4
3
2:0
Not Available
Zero-Crossing
RAM Mode Control
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