ADSP-BF523C AD [Analog Devices], ADSP-BF523C Datasheet - Page 3

• Manufacturer Part Number: ADSP-BF523C
• Description: Blackfin Embedded Processor 289-ball MBGA package
• Manufacturer: AD [Analog Devices]

Preliminary Technical Data
GENERAL DESCRIPTION
This document describes the differences between the ADSP-
BF523C/ADSP-BF525C/ADSP-BF527C and the ADSP-
BF522/ADSP-BF523/ADSP-BF524/ADSP-BF525/ADSP-
BF526/ADSP-BF527 standard product. Please refer to the pub-
lished ADSP-BF522/ADSP-BF523/ADSP-BF524/ADSP-
BF525/ADSP-BF526/ADSP-BF527 Revision PrD datasheet for
general description and specifications. This document only
describes the exceptions to that datasheet.
The ADSP-BF523C/ADSP-BF525C/ADSP-BF527C adds a low
power stereo CODEC with an integrated headphone driver to
the standard product. The CODEC is designed for portable
MP3 audio/speech players and recorders. The CODEC is also
suitable for MD, CD-RW machines and DAT recorders.
Stereo line and mono microphone level audio inputs are pro-
vided, along with a mute function, programmable line level
volume control and a bias voltage output suitable for an
electret-type microphone.
CODEC DESCRIPTION
The CODEC in the ADSP-BF523C/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/CODEC_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, CODEC_MCLK frequencies of either 12.288 MHz
(256 × f
DAC sampling rates of 8 kHz, 44.1 kHz or 88.2 kHz,
CODEC_MCLK frequencies of either 11.2896 MHz (256 × f
or 16.9344 MHz (384 × f
In USB mode, the XTI/CODEC_MCLK frequency is only 12
MHz allowing 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 port and 1.8 V for the digital port. The maximum
voltage is 3.6 V for all power supplies.
S
) or 18.432 MHz (384 × f
S
) can be used.
S
) can be used. For ADC or
Rev. PrC | Page 3 of 44 | June 2008
S
)
ADSP-BF523C/ADSP-BF525C/ADSP-BF527C
The CODEC uses stereo 24-bit multi-bit sigma delta ADCs and
DACs with oversampling digital interpolation and decimation
filters. Digital audio input word lengths from 16-bits to 32-bits
and sampling rates from 8 kHz to 96 kHz are supported.
Stereo audio outputs are buffered for driving headphones from
a programmable volume control. Line level outputs are pro-
vided along with anti-thump mute and power-up/power-down
circuitry.
The device is controlled by the ADSP-BF523C/ADSP-
BF525C/ADSP-BF527C 2-wire (TWI) or 3-wire serial periph-
eral interface (SPI). The interface provides access to all features
including volume controls, mutes, de-emphasis and extensive
power management facilities.