ADSP-BF522C/ADSP-BF525C/ADSP-BF527C

Preliminary Technical Data

Rev. PrB

|

Page 3 of 12

|

June 2007

GENERAL DESCRIPTION

This document describes the differences between the ADSP-

BF522C/ADSP-BF525C/ADSP-BF527C and the ADSP-

BF522/ADSP-BF525/ADSP-BF527 standard product. Please

refer to the published ADSP-BF522/ADSP-BF525/ADSP-BF527

Revision PrC datasheet for general description and specifica-

tions. This document only describes the exceptions to that

datasheet.

The ADSP-BF522C/ADSP-BF525C/ADSP-BF527C adds a ste-

reo CODEC to the standard product and changes the package

labeling.

STEREO CODEC

The CODEC in the ADSP-BF522C/ADSP-BF525C/ADSP-

BF527C is a low power, high quality stereo audio CODEC for

portable digital audio application. It features two 24-bit A/D

converter channels and two 24-bit D/A converter channels.

In normal mode, the XMI/MCLK oscillator is set up according

to the desired sample rates of the ADC and DAC. For ADC or

DAC sampling rates of 8 kHz, 32 kHz, 48 kHz or 96 kHz, MCLK

frequencies of either 12.288 MHz (256 × FS) or 18.432 MHz

(384 × FS) can be used. For ADC or DAC sampling rates of

8 kHz, 44.1 kHz or 88.2 kHz, MCLK frequencies of either

11.2896 MHz (256 × FS) or 16.9344 MHz (384 × FS) can be

used.

In USB mode, the XTI/MCLK frequency is only 12MHz allow-

ing for ADC and DAC sampling rates of 8 kHz, 44.1 kHz or 88.2

kHz.

The CODEC can operate with power supplies as low as 1.8 V for

the analog part and 1.8 V for digital port. The maximum voltage

is 3.6 V for all power supplies.

The device is controlled by a 2- or 3-wire serial interface which

provides access to all features including volume controls, mutes

and extensive power management facilities.

Figure 2. Audio CODEC Block Diagram

MUX

ADC

DAC

MUX

ADC

DAC

RLINEIN

MICBIAS

MICIN

LLINEIN

ATTENUATOR

ATTENUATOR

ATTENUATOR

ATTENUATOR

+

+

DIGITAL

FILTERS

RHPOUT

ROUT

LOUT

LHPOUT

CLK

DIGITAL AUDIO INTERFACE

CONTROL INTERFACE

XTI/MCLK XTO CCLKOUT DACDAT ADCDAT BCLK

DACLRC

ADCLRC

CMODE

CSB CSDA CSCL