CS4525 datasheet(66/91 Pages) CIRRUS

66 / 91 page

DS726A1

CS4525

9.2

Input Configuration (Address 02h)

9.2.1

Input Source Selection (ADC/SP)

Default = 0

Function:

This bit selects the audio input source.

9.2.2

ADC High-Pass Filter Enable (EnAnHPF)

Default = 1

Function:

Controls the operation of the ADC high-pass filter.

9.2.3

Serial Port Sample Rate (SPRate[1:0]) - Read Only

Default = XX

Function:

Identifies the sample rate of the incoming LRCK signal on the serial audio input port.

9.2.4

Input Serial Port Digital Interface Format (DIF [2:0])

Default = 000

Function:

Selects the serial audio interface format used for the data in on SDIN. The required relationship between

the Left/Right clock, serial clock and serial data is defined by the Digital Interface Format and the options

are detailed in the section “Serial Audio Interfaces” on page 57.

543

ADC/SP

EnAnHPF

Reserved

SPRate1

SPRate0

DIF2

DIF1

DIF0

ADC/SP Setting

Audio Input Source

0 .......................................... Digital input from the serial audio input port.

1 .......................................... Analog input from the internal ADC.

EnAnHPF Setting

ADC High-Pass Filter State

0 .......................................... ADC high-pass filter disabled.

1 .......................................... ADC high-pass filter enabled.

SPRate[1:0] Setting

Identified Input Sample Rate

00 ........................................ 32 kHz

01 ........................................ 44.1 kHz

10 ........................................ 48 kHz

11......................................... 96 kHz

DIF[2:0] Setting

Input Serial Port Serial Audio Interface Format

000 ...................................... Left-Justified, up to 24-bit data.

001 ...................................... I²S, up to 24-bit data.

010 ...................................... Right-Justified, 24-bit data.

011....................................... Right-Justified, 20-bit data.

100 ...................................... Right-Justified, 18-bit data.

101 ...................................... Right-Justified, 16-bit data.

110....................................... Reserved.

111 ....................................... Reserved.

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