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Old 6th April 2012, 11:47 AM   #1011
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Originally Posted by Turbon View Post
Now what's the best way to control this beast thru an MCU? Can everything be set from a MCU? No jumpers needed at all? No choises that has to be made before build it in?

Brgds
Simply leave the firmware chip (an MCU) off, and connect your MCU to the I2C header... Full control.
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Old 6th April 2012, 12:05 PM   #1012
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Hmmm, I feel an urge to have one of these...

Struggling.

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Old 6th April 2012, 12:50 PM   #1013
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Originally Posted by merlin el mago View Post
Thank you it's a very good information, connecting a wire between "B" on the Sidecar & pins 1 or 3 on the selector switch it's OK?
You can do it with whatever 2-bit selector position you like, but I would still disable SPDIF auto-detect in *all* cases where you are using PCM/DSD.
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Old 6th April 2012, 03:31 PM   #1014
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OK, Russ, for the two pole switch fix, just to be clear in my mind, like the attached image? And where should we ground B4?
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Last edited by Russ White; 6th April 2012 at 11:20 PM.
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Old 6th April 2012, 03:37 PM   #1015
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Originally Posted by Russ White View Post
The best way to do this is with dual pole single throw switch. One pole should be connected to GND and "B5" on the Buf III I/O header - the other to 5V and "B" on the Sidecar. In this way when PCM/DSD is selected SPDIF auto-detection is disabled. You also get to use all 4 SPDIF selections.

Cheers!
Russ
Dual pole single throw switch, like this?

Click the image to open in full size.

So one position connected to GND and "B5" on the Buf III I/O header - the other to 5V and "B" on the Sidecar so you switching between:

-GND on the Buf III I/O header and 5V on the Sidecar
-"B4" on the Buf III I/O header and "B" on the Sidecar

Where have I to connect the two middle pins of the switch?

Last edited by Russ White; 6th April 2012 at 11:20 PM.
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Old 6th April 2012, 10:32 PM   #1016
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sry but Im a little confused:
according to leonbv B5 is IRR bandwidth (page 34 switch 6)
if one wants to change s/pdif autodetect switch 5 aka B4 is the one to throw to gnd
or did I miss something?

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Old 6th April 2012, 11:13 PM   #1017
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Originally Posted by SCompRacer View Post
OK, Russ, for the two pole switch fix, just to be clear in my mind, like the attached image? And where should we ground B5?
Yes the switch is correct.

You connect to B4 at EXT_IO. Refer to the integration guide.
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Last edited by Russ White; 6th April 2012 at 11:19 PM.
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Old 6th April 2012, 11:13 PM   #1018
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Quote:
Originally Posted by merlin el mago View Post
Dual pole single throw switch, like this?

Click the image to open in full size.

So one position connected to GND and "B5" on the Buf III I/O header - the other to 5V and "B" on the Sidecar so you switching between:

-GND on the Buf III I/O header and 5V on the Sidecar
-"B5" on the Buf III I/O header and "B" on the Sidecar

Where have I to connect the two middle pins of the switch?
Look at the post above yours. The switch you show is not a DPST, but a DPDT.
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Old 6th April 2012, 11:15 PM   #1019
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Quote:
Originally Posted by leifchristensen View Post
sry but Im a little confused:
according to leonbv B5 is IRR bandwidth (page 34 switch 6)
if one wants to change s/pdif autodetect switch 5 aka B4 is the one to throw to gnd
or did I miss something?

best
Leif
B4 is SPDIF auto-detect Bypass (Switch 2:5) I will correct my post.

I forgot that the ports are 0 indexed and the switches 1 indexed.

I tried to edit posts to make this more clear.

Switch 2:5 is indeed EXT I/O port B4. Sorry for any confusion.
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Last edited by Russ White; 6th April 2012 at 11:22 PM.
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Old 6th April 2012, 11:43 PM   #1020
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Good catch Leif. Thanks Russ! I attached a corrected image noting B4 in this post. I don't have the power to delete or change the image in my prior post but would encourage those who do to change it or delete it. Thanks!

Do I ground B4 to the chassis, VG on the Sidecar or a ground on the external I/O connector header?
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