参数资料
型号: AD9704-DPG2-EBZ
厂商: Analog Devices Inc
文件页数: 27/44页
文件大小: 0K
描述: BOARD EVAL FOR AD9704
标准包装: 1
系列: *
Data Sheet
AD9704/AD9705/AD9706/AD9707
Rev. B | Page 33 of 44
SPI REGISTER DESCRIPTIONS
Table 16. SPI CTL—Register 0x00
Mnemonic
Bit No.
Direction (I/O)
Default
Description
SDIODIR
7
I
1
0 = SDIO pin configured for input only during data transfer (4-wire interface).
1 = SDIO pin configured for input or output during data transfer (3-wire interface).
DATADIR
6
I
0
0 = Serial data uses MSB first format.
1 = Serial data uses LSB first format.
SWRST
5
I
0
1 = initiates a software reset; this bit is set to 0 upon reset completion.
LNGINS
4
I
0
0 = uses 1 byte preamble (5 address bits).
1 = uses 2 byte preamble (13 address bits).
PDN
3
I
0
1 = shuts down DAC output current internal band gap reference.
Sleep
2
I
0
1 = DAC output current off.
CLKOFF
1
I
0
1 = disables internal master clock.
EXREF
0
I
0
0 = internal band gap reference.
1 = external reference.
Table 17. Data—Register 0x02
Mnemonic
Bit No.
Direction (I/O)
Default
Description
DATAFMT
7
I
0
0 = unsigned binary input data format
1 = twos complement input data format
DCLKPOL
4
I
0
0 = data latched on DATACLK rising edge always
1 = data latched on DATACLK falling edge (only active in DESKEW mode)
DESKEW
3
I
0
0 = DESKEW mode disabled.
1 = DESKEW mode enabled (adds a register in digital data path to remove
skew in received data; one clock cycle of latency is introduced)
CLKDIFF
2
I
0
0 = single-ended clock input
1 = differential clock input
CALCLK
0
I
0
0 = calibration clock disabled
1 = calibration clock enabled
Table 18. Version—Register 0x0D
Mnemonic
Bit No.
Direction (I/O)
Default
Description
VER[3:0]
[3:0]
O
0000
Hardware version identifier
Table 19. CALMEM—Register 0x0E
Mnemonic
Bit No.
Direction (I/O)
Default
Description
CALMEM[1:0]
[5:4]
O
00
Calibration memory
00 = uncalibrated
01 = self-calibration
10 = not used
11 = user input
DIVSEL[2:0]
[2:0]
I
000
Calibration clock divide ratio from DAC clock rate
000 = divide by 256
001 = divide by 128
110 = divide by 4
111 = divide by 2
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