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參數(shù)資料
| 型號： | AD9956 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 2.7 GHz DDS-Based AgileRF |
| 中文描述： | 2.7千兆赫基于DDS的AgileRF |
| 文件頁數(shù)： | 22/32頁 |
| 文件大?。?/td> | 805K |
| 代理商： | AD9956 |
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AD9956
SERIAL PORT OPERATION
An AD9956 serial data-port communication cycle has two
phases. Phase 1 is the instruction cycle, which is the writing of
an instruction byte to the AD9956, coincident with the first
eight SCLK rising edges. The instruction byte provides the
AD9956 serial port controller with information regarding the
data transfer cycle, which is Phase 2 of the communication cycle.
The Phase 1 instruction byte defines whether the upcoming data
transfer is read or write and the serial address of the
register being accessed.
Rev. 0 | Page 22 of 32
The first eight SCLK rising edges of each communication cycle
are used to write the instruction byte into the AD9956. The
remaining SCLK edges are for Phase 2 of the communication
cycle. Phase 2 is the actual data transfer between the AD9956
and the system controller. The number of bytes transferred
during Phase 2 of the communication cycle is a function of the
register being accessed. For example, when accessing Control
Function Register 2, which is four bytes wide, Phase 2 requires that
four bytes be transferred. If accessing a frequency tuning word,
which is six bytes wide, Phase 2 requires that six bytes be
transferred. After transferring all data bytes per the instruction,
the communication cycle is completed.
At the completion of any communication cycle, the AD9956
serial port controller expects the next eight rising SCLK edges
to be the instruction byte of the next communication cycle. All
data input to the AD9956 is registered on the rising edge of
SCLK. All data is driven out of the AD9956 on the falling edge
of SCLK. Figure 29 through Figure 32 are useful in understand-
ing the general operation of the AD9956 serial port.
0
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7
INSTRUCTION CYCLE
SCLK
SDI/O
DATA TRANSFER CYCLE
CS
Figure 29. Serial Port Write Timing—Clock Stall Low
0
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DON'T CARE
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7
INSTRUCTION CYCLE
SCLK
SDI/O
DATA TRANSFER CYCLE
D
O 5
D
O 4
D
O 3
D
O 2
D
O 1
D
O 0
D
O 7
D
O 6
SDO
CS
Figure 30. 3-Wire Serial Port Read Timing—Clock Stall Low
0
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7
INSTRUCTION CYCLE
SCLK
SDI/O
DATA TRANSFER CYCLE
CS
Figure 31. Serial Port Write Timing—Clock Stall High
0
I
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D
O 5
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O 4
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O 3
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O 0
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0
D
O 7
D
O 6
I
7
INSTRUCTION CYCLE
SCLK
SDI/O
DATA TRANSFER CYCLE
CS
Figure 32. 2-Wire Serial Port Read Timing—Clock Stall High
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| AD9957BSVZ | 1 GSPS Quadrature Digital Upconverter with 18-Bit IQ Data Path and 14-Bit DAC |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| AD9956/PCB | 制造商:Analog Devices 功能描述:Evaluation Board For AD9956, 2.7 GHz DDS-Based AgileRF Synthesizer 制造商:Analog Devices 功能描述:EVAL BD FOR AD9956, 2.7 GHZ DDS-BASED AGILERF SYNTHESIZER - Trays 制造商:Rochester Electronics LLC 功能描述:400 MSPS 14 BIT DDS EVAL BD. - Bulk |
| AD9956/PCBZ | 功能描述:BOARD EVAL FOR AD9956 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估演示板和套件 系列:AgileRF™ 標準包裝:1 系列:PSoC® 主要目的:電源管理，熱管理 嵌入式:- 已用 IC / 零件:- 主要屬性:- 次要屬性:- 已供物品:板，CD，電源 |
| AD9956-VCO/PCB | 制造商:Analog Devices 功能描述:EVAL BD FOR AD9956, 2.7 GHZ DDS-BASED AGILERF SYNTHESIZER - Trays 制造商:Analog Devices 功能描述:EVAL CARD ((NS)) |
| AD9956-VCO/PCBZ | 功能描述:BOARD EVAL 14BIT 1.8V 48LFCSP RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估演示板和套件 系列:AgileRF™ 標準包裝:1 系列:PSoC® 主要目的:電源管理，熱管理 嵌入式:- 已用 IC / 零件:- 主要屬性:- 次要屬性:- 已供物品:板，CD，電源 |
| AD9956XCPZ | 制造商:Analog Devices 功能描述:DGTL SYNTHESIZER 48LFCSP EP - Tape and Reel |
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