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5. The delay also can be controlled with the Frame Delay option. Simply click on the Frame Delay Mode
1 ON/OFF box, and the frame delay options become available. Frame delay mode affects both left and
right channels simultaneously (see
Figure 2 ).
6. Clicking on the Right Justified mode under Stream Type brings up a hidden window, called Packet
Length. Through this, the number of packet lengths to be delayed can be entered (see Figure 3 ).
7. The option Bypass simply sets the TPA5051 to pass the data through, without doing any manipulation
to it.
8. The I2C Status display at the bottom right indicates whether the device and the computer are
communicating properly. A red status bar indicates a problem. A green status bar indicates the device
and computer are talking (see
Figure 4 ). Possible solutions to the red status bar problem are to
depress and release the reset button on the TI Input USB board, check to see that all cables are
properly connected, restart the TPA5051 GUI, remove and then re-insert the USB cable into the
computer, reboot the computer, or re-install the software.
9. The list of registers on the right side of the screen (0x01
…
0x10) indicate what values were last written
to that particular register. The TPA5051 has eighteen registers, however the two Complete Update
registers are not shown on the GUI. Therefore, only registers (0x01
…
0x07) and (0x09
…
0x0F) are
shown.
10. The channel selection tab is designed for use with the TPA5051, which has two independent digital
audio inputs. Selecting the Channel 1 tab allows control of the registers for digital audio input 1
(DATA1 of the device). Selecting the Channel 2 tab allows control of the registers for digital audio input
2 (DATA2 of the device). See
Figure 2
Figure 1. TPA5051 in I
2
S Mode With Separate Delays for Left and Right Channels
SLOU184 – July 2006 TPA5051EVM 3
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