QN8007B/8007LB
6 DIGITAL AUDIO INTERFACE PROTOCOL
6.1 Introduction
The QN8007 uses an I2S interface to transfer audio data from the external source.
Master or Slave modes are supported.
Multiple data widths are supported: 8, 16, 24, and 32 bits.
Multiple data alignments are supported: I2S, DSP1, DSP2, MSB-Justified, and LSB-Justified modes.
The term 'transmitter' as described below is from the QN8007's point of view.
6.2 I2S BUS Signal Description
A 3-line serial bus is used consisting of a line for two time-multiplexed data channels, a word select line, and a clock line.
The following figure shows how to use these three signals in the QN8007.
Figure 12: Top Level Block Diagram of I2S
In Master mode, the serial clock signal SCK and the word selection signal WS are generated by the QN8007 and are output
to the external device. In Slave mode, those two signals are input signals from the external device.
The QN8007 receives the serial data from the external device by the SD signal.
Rev 2.09 (11/09)
Confidential A
Copyright ©2009 by Quintic Corporation
Confidential Information contained herein is covered under Non-Disclosure Agreement (NDA).
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