TWR-AUDIO-DA7321 User Manual Rev0.3 - June 2013 2
© Dialog Semiconductor 2013
TWR-AUDIO-DA7321 USER MANUAL
1 Introduction
The TWR-AUDIO-DA7321 is a Tower Peripheral Module compatible with the Freescale Tower
System http://www.freescale.com/webapp/sps/site/homepage.jsp?code=TOWER_HOME. The TWR-
AUDIO-DA7321 peripheral module features the Dialog DA7321 audio codec.
The DA7321 is a multi-channel Audio CODEC processor with adjustable DSP effects that consists of
5 analogue inputs and 5 DAC driving outputs suitable for a variety of low power, digital portable audio
products. Featuring a high efficiency headphone amplifier and supporting economic single supply
voltages of 1.6V. The ultra-low 3.85mW power consumption extends music playback time for battery
operated equipment.
The features of the TWR-AUDIO-DA7321 peripheral module are:
- DA7321 multi-channel Audio CODEC processor with adjustable DSP effects
- Stereo AUX_IN on a 3.5mm jack socket
- MIC input on a 3.5mm jack socket
- MIC input via an on-board MEMS microphone
- Smartphone compatible HEADSET connection on a 3.5mm jack socket
- Interchangeable GND and MIC routing to the smartphone jack allows multiple headsets to be
supported
- Compatible with the Freescale Tower System
2 TWR-AUDIO-DA7321 Hardware Description
The TWR-AUDIO-DA7321 is a Tower Peripheral Module featuring the DA7321 audio codec.
2.1 DA7321 Audio Codec
The DA7321 audio codec is controlled via the Tower processor over the I2C serial communication
interface. Digital audio is transmitted and received over the I2S interface.
The default I2C device address for the DA7321 is:
• Write = 0x34h
• Read = 0x35h
The I2S interface digital audio transfer between the processor and the DA7321 can be done in Slave
or Master mode (Slave = DA7321 receives BCLK and WCLK; Master = DA7321 generates BCLK and
WCLK).
2.2 Power Supply
There are two regulators on the TWR-AUDIO-DA7321, both are driven by the +5V supply sourced
from the Tower Elevator connectors.
U8 generates a +1.6V supply while U9 generates +3.3V.
These supplies power all circuitry on the TWR-AUDIO-DA7321.
The regulators both have ‘/shutdown’ pins which are connected via a level shift to the ‘nRSTIN/OUT’
(A62 or A63) pins on the Primary Tower Elevator connector.
Important: The nRSTIN signal must be driven high or set high-Z (on-board pull-up R33) to
enable the regulators.
(14 paginas)
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