DEM-DAI1602 Datasheet, PDF (9/11 Pages) Texas Instruments – EVALUATION FIXTURE

Although the Attenuation window is used to set the level of
the attenuation registers, the actual attenuators inside the
PCM1602 will not be updated unless the attenuation load
control, ATLD, (in the Operational Control window) is set to
LOAD. While ATLD is set to OFF, the attenuation registers
are written to, but the attenuators are not updated. When
ATLD is switched from OFF to LOAD, all attenuators will
be updated simultaneously.
Operational Control Window
The Operational Control window (labeled DAC Operation) is
used to program the soft mute (MUT1-6) and DAC operation
(DAC1-6) functions. The mute and DAC operation functions
are set using check boxes, as shown in Figure 7. The labels
associated with the check boxes change from ON to OFF as
the settings are toggled.
FIGURE 8. Function Control Window.
Register Read Window
The PCM1602 serial control interface includes register read
capability. The Register Read window (or panel) allows the
user to read the value of all PCM1602 registers by pressing
a single button. The panel is shown in Figure 9. The Register
Read panel provides a means to check for proper communi-
cations between the PC printer port and the DEM-DAI1602
by allowing the user to verify register write operations.
FIGURE 7. Operational Control Window.
For more information regarding these functions, please refer
to the PCM1602 Product Data Sheet.
Function Control Window
The Function window hosts the remainder of the PCM1602
control functions. All functions are programmed using pull-
down menus, as shown in Figure 8. Functions that can be
programmed by this window include:
• SCKO Output Enable (CLKE) and Rate (CLKD) Controls
• De-Emphasis Control (DMC) and Sample Rate Selection (DMF)
• Audio Data Format (I/F FORMAT)
• Digital Filter Roll-Off (ROLL-OFF)
• Output Phase (Normal or Inverted)
• Oversampling (64f_S or 128f_S)
• Zero Flag Phase (Z-Flag Phase)
These functions are described in detail in the PCM1602
Product Data Sheet.
DEM-DAI1602
SBAU035
FIGURE 9. Register Read Window.
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