User Manual

1-Aug-2012
18
2.4.3 I2S Audio Codec
An Analog Devices ADAU1761 Audio Codec provides integrated digital audio processing to the
EPP. It allows for stereo 48KHz record and playback. Sample rates from 8KHz to 96KHz are
supported. Additionally, the ADAU1761 provides digital volume control. The Codec can be
configured using Analog Devices SigmaStudio™ for optimizing audio for specific acoustics,
numerous filters, algorithms and enchancements. Analog Devices provides Linux drivers for this
device.
http://www.analog.com/en/content/cu_over_sigmastudio_graphical_dev_tool_overview/fca.html
The Codec interface to the EPP consists of the following connections:
Table 9 - CODEC Connections
Signal Name
Description
Zynq EPP pin
ADAU1761 pin
AC-ADR0
I2C Address Bit 0/SPI Latch
Signal
AB1
3
AC-ADR1
I2C Address Bit 1/SPI Data
Input
Y5
30
AC-MCLK
Master Clock Input
AB2
2
AC-GPIO2
Digital Audio Bit Clock
Input/Output
AA6
28
AC-GPIO3
Digital Audio Left-Right Clock
Input/Output
Y6
29
AC-GPIO0
Digital Audio Serial-Data DAC
Input
Y8
27
AC-GPIO1
Digital Audio Serial Data ADC
Output
AA7
26
AC-SDA
I2C Serial Data interface
AB5
31
AC-SCK
I2C Serial Data interface
AB4
32
The Codec connects to the following connectors:
Table 10 - External Codec Connections
3.5mm Audio (Mic In) Pink
TE
1734152-5
3.5mm Audio (Line In) Light Blue
TE
1734152-6
3.5mm Audio (Line Out) Lime
TE
1734152-4
3.5mm Audio (Headphone) Black
TE
1734152-7