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leres  
#1 Posted : Sunday, September 16, 2012 3:30:02 AM(UTC)
leres

Rank: Member

Groups: Member
Joined: 9/11/2012(UTC)
Posts: 1
United States

I have a satellite radio that is uses a CS4349 to do volume control and digital to analog conversion. I'm trying to use a WM8804 board add digital output by converting I2S to S/PDIF.

I believe I need to configure the WM8804 for slave mode (AIF/MS L) and the receive source to the audio interface (TXSRC H). Since the CS4349 is configured for I2S with up to 24 bit data (DIF0 H, DIF1 L and DIF2 L) I configured the WM8804 for 24 bit left justified (AIFCONF1 H, AIFCONF0 L). The dip switches are right, left, right and left.

Convenient test points on the tuner give access to SCLK (2.3 MHz):

SCLK

LRCLK (44.1 KHz):

LRCLK

and SDIN:

SDIN

I'm not having luck getting the WM8804 to sync up and haven't found any examples of folks using the W8804 to do I2S to S/PDIF conversion. What am I doing wrong? The CS3449 does not have a master clock input do I need to supply this to the W8804? Would I be better off using a CS8406 to do this?

Edited by user Sunday, September 16, 2012 5:48:46 PM(UTC)  | Reason: Not specified

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