Integration Guide

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Hardware Integration Guide
Audio
4.2. Digital Audio
The AirPrime AR7552 provides a 4-wire digital audio interface. This interface can be configured as
either a PCM or an I2S.
Table 18. Digital Audio Interface Pads
Pad
Name
Direction
1
PCM
Function
Direction
I2S Function
If Unused
DB3
PCM_FS
Output
PCM Frame
Sync
Input/Output
I2S_WS
Leave Open
DA3
PCM_CLK
Output
PCM Clock
Input/Output
I2S_SCLK
Leave Open
DC2
PCM_DOUT
Output
PCM Data Out
Output
I2S_DOUT
Leave Open
DD2
PCM_DIN
Input
PCM Data In
Input
I2S_DIN
Leave Open
1 Direction when defined in Master mode.