Changes To Waveform Options Section, Power-Down Options Section, And Figure 9 To Figure 14 - Analog Devices EVAL-CN-304-SDZ User Manual

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Waveform Options
The output waveform options that can be selected are sinusoidal
waveform or ramp waveform. The SIGN BIT OUT pin output
can be selected using three options: selecting MSB or MSB/2 of
the phase accumulator or selecting the internal comparator. If
this pin is not used, click DISABLE (see Figure 9).
Figure 9. Waveform Profile and SIGN BIT OUT
Power-Down Options
The AD9834 has various power-down options selected through
the control register. The master clock (MCLK) or the DAC can
be disabled, or both sections can be powered down for a lower
power sleep mode (see Figure 10).
Figure 10. Power-Down Options
EVAL-CN-304-SDZ Evaluation Board User Guide
Hardware Options
If the hardware programming method is selected (see Figure 6),
the FSELECT (FSEL0), PSELECT (PSEL0), RESET, and SLEEP
pin functions can be toggled. The GPIO outputs on the
SDP-CB1Z board control these pin functions. For example,
frequency data can be loaded to the FREQ 0 register and the
FREQ 1 register and the output can be toggled by the FSELECT
pin, that is, 2FSK functionality.
Reset and Sweep
Use the Reset Bit button shown in Figure 13 to set the reset
software command. To set up a DDS sweep, click FREQUENCY
SWEEP.
Figure 13. Software Reset and Sweep Select
The sweep function allows users to load a Start Frequency,
Stop Frequency, increment size (Step Frequency), number of
loops (N. of Loops), and Delay between each frequency
increment. These commands then load to the device
automatically from the
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Figure 11. GPIO Hardware Pin Control
Figure 12. FSEL0 Hardware Pin Control
EVAL-SDP-CB1Z board.
Figure 14. Sweep Functionality
EVAL-