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Version 1.0
Register settings.
Register 0x0 – DAC Register (report to
Bit
number
Bit 31
Bit 30
Bit 29
Bit 28
Bit 27-24
SDIO bidirectional. '0'=Input or '1'=I/O - To be set to '0' when using default
Bit 23
Bit 22
LSB, MSB first. '0'=MSB or '1'=LSB – To be set to '0' when using default firmware.
Bit 21
Bit 20
Bit 19
Bit 18
Bit 17
Bit 16
Bit 15
Bit 14
Bit 13
Bit 12
Enable zero stuffing. '0'=No zero stuffing on interpolation filter or '1'=Enables zero
Bit 11
Bit 10
Bit 9
Bit 8
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
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Software reset on logic '1'
Sleep Mode. '1'=shuts down the DAC output currents.
Power-Down Mode. '1'=shuts down all digital and analogue functions.
PLL_LOCK indicator – (only on read back)
Filter interpolation rate – Bit 1 (1x, 2x, 4x or 8x).
Filter interpolation rate – Bit 0 (1x, 2x, 4x or 8x).
Modulation mode – Bit 1 (None, f
Modulation mode – Bit 0 (None, f
Mix Mode. '0'=Complex and '1'=Real.
DATACLK/PLL_LOCK select. '0'=PLLLOCK or '1'=DATACLK.
'0'=Signed Input Data (Two's complement) or '1'=Unsigned (Binary).
'0'=Two Port Mode or '1'=One Port Mode.
DATACLK Driver strength
DATACLK Invert. '0'=No Invert or '1'=Invert.
ONEPORTCLK Invert. '0'=No invert or '1'=Invert.
IQSEL Invert. '0'=No invert or '1'=Invert.
Q first. '0'=I first or '1'=Q first.
AD9777
datasheet for more details).
Description
0
0
0
0
Not Used.
firmware.
1R/2R Mode DAC.
Not Used.
/2, f
s
/2, f
s
stuffing.
-jw
+jw
'0'=e
or '1'=e
Not Used.
SMT370v2 User Manual
/4 or f
/8).
s
s
/4 or f
/8).
s
s
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