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Operation
Table 3. Digital Audio Receiver Data Format
SW001
SW002
SW003
Receiver Output Data Format
L
H
L
16-24 bit I
2
S
H
L
H
16-bit Right Justified
4. Set switch SW005 to INT (CS8414). See Note 4 in
.
Power Supply
1. Ensure that all external power sources are set to off
2. Connect a 5-V supply to CN054 and CN055 on the DEM-DAI/DAC platform. See Note 3 in the
. CN054 should be connected to the positive and CN055 connected to the negative side of the
supply.
3. Connect an external regulated power supply adjusted from 8 V–18 V to the module VCC (J4) and GND
(J3) banana jacks taking care to observe marked polarity. Be careful when inserting the banana plugs
to ensure that they are not inserted too far and short out vias on the DEM-DAI/DAC platform below.
2.2.2
Evaluation Module Preparations (Step 2)
Inputs and Outputs
1. Ensure that a CD/DVD player or audio precision is connected via a single RCA cable from the coaxial
(digital) output to CN001 or use an optical cable to connect from the optical (digital) output to U001 on
the DEM–DAI/DAC platform.
2. Connect a speaker across OUTP (J8) and OUTN (J7) on the TPA3200D1EVM.
3. Install both gain jumpers GAIN0 (J5) and GAIN1 (J6) on the TPA3200D1EVM. This sets the gain of
the amplifier to the lowest level, 12 dB.
Control Inputs
1. SHUTDOWN: This terminal is active low. A low on the device terminal (< 0.8 V) shuts down the
amplifier; a high (> 2 V) on the device terminal places the amplifier in the active state. Holding down
switch S1 places the amplifier in the SHUTDOWN state. Releasing S1 returns the amplifier to the
active state.
2. MUTE: This terminal is active high. A high on this terminal immediately terminates audio playback
through the speakers. However, the outputs are still active (they are switching). The outputs are not
disabled like the SHUTDOWN case above. S3 on the EVM controls the state of the MUTE terminal.
Switching the left side of S3 to 1 turns Mute on. Switching S3 to the 0 position turns Mute off.
3. FORMAT: This terminal selects between two possible digital data input formats. S2 on the EVM
controls the data format. Switching the right side of S2 to 0 selects the 16–24 bit, I
2
S format. Switching
the right side of S2 to 1 selects the 16-bit right-justified format. Switches SW001–SW003 should be set
on the DEM platform to match the settings on the EVM.
4. LSEL/RSEL: A typical digital input data stream consists of 2 channels of data. However, this amplifier
is a mono, bridged-tied amplifier. Therefore, it is necessary to select which channel of data is sent to
the mono output. This terminal is used to select between the 2 channels, typically left/right data.
Switching the left side of S2 to the RSEL position selects right-channel data. Switching the left side of
S2 to the LSEL position selects left-channel data.
5. DEMP: This terminal is used to enable/disable the internal 44.1-kHz de-emphasis filter. S3 on the EVM
controls the functionality of this terminal. Switching the right side of S3 to the 0 position disables the
44.1-kHz de-emphasis. Switching the right side of S3 to the 1 position enables the 44.1-kHz
de-emphasis.
6. GAIN0/GAIN1: Together, these terminals control the back-end gain of the amplifier. Jumpers J5 and
J6 control these terminals. The position of these jumpers and resulting gain is shown in
SLOU173B – June 2005 – Revised July 2005
TPA3200D1 Audio Power Amplifier Evaluation Module
7
