CRD-4525-Q1 Cirrus Logic Inc, CRD-4525-Q1 Datasheet - Page 5

• Manufacturer Part Number: CRD-4525-Q1
• Description: Audio Modules & Development Tools Eval Bd PWM Contrlr+ PwrStg_2Lyr 1oz Cu
• Manufacturer: Cirrus Logic Inc

Specifications of CRD-4525-Q1

• Description/function: Audio Amplifiers
• Operating Supply Voltage: 18 V
• Product: Audio Modules
• For Use With/related Products: CS4525
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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umns labeled “EXT SAI”. A single ground column for the ribbon cable’s ground connection is provided to
maintain signal integrity.
The 8-pin, 2 column header, J11, provides access to the CS4525’s auxiliary serial audio port output signals,
as well as the SYS_CLK output signal. A single ground column is provided to maintain signal integrity.
The 20-pin, 2 column header, J4, is included to interface with a CRD4412A card. Various signals, power,
and ground are presented on this header. Notably, this header includes the DLY_SDOUT and DLY_SDIN
signals which can be used to interface with an external delay device or DSP. See
nectivity information.
Analog Inputs
RCA connectors supply the CS4525 analog inputs through single-ended passive circuits with one pole of
input filtering. A resistive attenuation network is implemented to allow 2 V
the CRD4525-Q1. Refer to the CS4525 data sheet for the maximum input signal level at the analog input
pins.
Speaker Outputs
The CS4525 power outputs are configured for stereo full-bridge operation. The outputs are routed through
a 2
the speaker wire crimp terminals (J5). The output filters are optimized for 8 Ω speaker loads. The speaker
terminal connections are shown below.
PC Control
A USB connection is provided to facilitate software control of the CS4525’s internal registers.
A graphical user interface is available for the CRD4525-Q1 to allow easy manipulation of the CS4525’s in-
ternal registers. See the CS4525 data sheet for complete internal register descriptions.
To enable the CRD4525-Q1, simply connect the supplied USB cable from an available USB port on a PC
to the USB connector (J37) and launch the Cirrus Logic FlexGUI software.
A visual indicator is provided by an on-board LED (D12) that illuminates when the board is being operated
under PC control. When operating under PC Control, the stand-alone controls on the board should not be
manipulated.
Refer to
Stand-Alone Control
A volume control knob (S1), reset button (S2), and mute button (S3) are included for stand-alone operation
of the CRD4525-Q1. These controls were not supported by early versions of firmware running on the
CRD4525-Q1, so it may be necessary to upgrade older firmware versions to enable their functionality.
nd
order low-pass filter to remove high-frequency content from the output signals and then presented at
“PC Software Control” on page 7
Figure 1. Speaker Terminal Configuration
for a description of the Graphical User Interface (GUI).
R
L
RMS
input levels to be supplied to
Figure 6
CRD4525-Q1
for complete con-
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