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Old 27th June 2008, 04:17 PM   #1
mr-mac is offline mr-mac  Scotland
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Join Date: Jul 2001
Location: Dunfermline, Scotland
Default add digital out to PDA with WM9705

Hi,

I have a pda (well more like a mini laptop - clamshell with keyboard and 5" TFT screen).

Been wanting to add a SPDIF digital out to it so started investigating if it might be possible, what chip it had installed etc.

The datasheet at http://www.wolfsonmicro.com/uploads/...705_Rev4.4.pdf confirms that there is an SPDIF out on the chip.

Pin 48 is marked as SPDIF but I am not sure where I would attach the ground. Also just noticed pin 44 is SPDIF hardware enable PIN and I2s out (what would I need to provide to this pin to enable the SPDIF out?)

Also if I wanted a digital out can I just take the signal straight from the chip to a socket for the digital-out? or would I need to feed it through some components to make it suitable to be attached to a DAC?

Any advice and info greatly appreciated.

John
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