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Opus 3.3v point?
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simbloke  
#1 Posted : Sunday, June 12, 2011 8:27:20 AM(UTC)
simbloke

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Hi,

I'm looking for a suitable point to take 3.3v from the Opus to power one side of an i2c isolator but I can't really see anywhere.

One thought I had was to take a line high with the DIP switch and take 3.3v from the corresponding I/O pad. According to the WM8741 datasheet pin22 (OSR) is unused in software mode and this is available on the switch.

Does this sound OK?

Sim
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Russ White  
#2 Posted : Monday, June 13, 2011 5:44:53 AM(UTC)
Russ White

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At the switch would be fine, or at C1 or even the regulator itself.
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simbloke  
#3 Posted : Monday, June 13, 2011 6:05:13 AM(UTC)
simbloke

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Thanks, now on to my next i2c issue...
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