CS4525(2008) 查看數據表（PDF） - Cirrus Logic
零件编号
产品描述 (功能)
生产厂家
CS4525 Datasheet PDF : 98 Pages
| |||
6.1.3
CS4525
Input Source Selection
The CS4525 can accept analog or digital audio input signals. Digital audio input signals are supplied
through the serial audio input port as outlined in “Serial Audio Interfaces” on page 62. Analog audio input
signals are supplied through the internal ADC as outlined in “Analog Inputs” on page 61. The input source
is selected by the ADC/SP bit in the Input Config register.
In software mode, the serial audio input port supports I²S, Left-Justified and Right-Justified data formats.
The serial audio input port digital interface format is configured by the DIF[2:0] bits in the Input Config reg-
ister.
The CS4525 internal ADC includes a dedicated high-pass filter to remove any DC content from the ADC
output signal prior to the internal ADC/serial audio input port input multiplexor. This high-pass filter can be
bypassed by clearing the EnAnHPF bit.
Referenced Control
Register Location
ADC/SP............................... “Input Source Selection (ADC/SP)” on page 71
DIF[2:0] ............................... “Input Serial Port Digital Interface Format (DIF [2:0])” on page 71
EnAnHPF ............................ “ADC High-Pass Filter Enable (EnAnHPF)” on page 71
6.1.4
Digital Sound Processing
The CS4525 implements flexible digital sound processing operations including bass management cross-
over, 2-way speaker crossovers, high- and low-pass shelving filters, programmable parametric EQ filters,
adaptive loudness compensation, channel mixers, and volume controls.
The digital signal flow is shown in Figure 14 below. The signal processing blocks are described in detail
in the following sections.
Stereo
Analog In
Serial Audio
Clocks & Data
Serial Audio
Data I/O
Serial Audio
Clocks & Data
ADC
High-
Pass
Serial Audio
Input Port
Serial Audio
Delay
Interface
Auxiliary
Serial Port
Audio
Processing
Parametric EQ
High-Pass
Bass/Treble
Adaptive
Loudness
Compensation
2-Ch Mixer
2.1 Bass Mgr
Linkwitz-Riley
Crossover
De-Emphasis
Volume
Ch. 1 Sample
Rate
Converter
PWM
Modulator
Ch. 2 Sample
Rate
Converter
PWM
Modulator
Sub Sample
Rate
Converter
PWM
Modulator
Temperature Sense
PWM
Output
Config
Gate
Drive
Gate
Drive
Gate
Drive
Gate
Drive
Power
Stage
Power
Stage
Power
Stage
Power
Stage
Amplifier
Out 1
Amplifier
Out 2
Amplifier
Out 3
Amplifier
Out 4
PWM Modulator
Output 1
PWM Modulator
Output 2
Temperature
Sense
Serial Audio
Data In
Left
Right
DS726PP3
Ch. A
Ch. B
Thermal Foldback
Ch. A
Ch. B
Sub
Loudness
Thermal Limiter
Ch. A HPF
Ch. A LPF
Ch. B HPF
Ch. B LPF
Ch. A
Ch. A HPF
Ch. A LPF
Ch. B
Ch. B HPF Ch. B LPF
Aux Serial Data Select
Figure 14. Digital Signal Flow
Ch. 1
Ch. 2
Sub
Data to
Aux Port
29
Share Link: 