SAA7310 I2s problems - diyAudio
Go Back   Home > Forums > Source & Line > Digital Source

Digital Source Digital Players and Recorders: CD , SACD , Tape, Memory Card, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 6th February 2012, 08:02 PM   #1
diyAudio Member
 
buzzforb's Avatar
 
Join Date: Oct 2010
Location: Burlington, NC
Default SAA7310 I2s problems

trying to pull I2s from my Sa7310 chip directly to offboard Peter Daniels TDA 1543 and had some questions. If i remove the onboard chip and route the wires from vacated holes to my offboard chip, do i need to make any connections with the open holes on main board? Everything is wired properly and should be working, but nothing. THe DAC has its own PSU so i did not attach ground of seperate psu to ground pin on main board, assuming it was unnecessary, but have I broken a necessary link for the I2s lines. Normally they would be routed to ground through TDA chip present onboard.
  Reply With Quote
Old 6th February 2012, 11:25 PM   #2
diyAudio Member
 
Join Date: Jan 2008
Location: Virginia
It usually needs the SAA7220 or SAA7320 DAC to provide the clock...
  Reply With Quote
Old 7th February 2012, 12:27 AM   #3
diyAudio Member
 
buzzforb's Avatar
 
Join Date: Oct 2010
Location: Burlington, NC
Bck, ws, and data are going to pins 1,2, and 3 resoectively. The question is whether the ground pin needs to be connected to the ground plain of the source of this lines versus what is now its own floating supply. The internal diagram shows a ground reference, which i have, but it is referenced to battery powered regulator and therefore not connected in anyway to main i2s signal board except for three i2s connections
  Reply With Quote
Old 7th February 2012, 01:46 AM   #4
diyAudio Member
 
Join Date: Jan 2008
Location: Virginia
Electricity neeeds two wires to flow. That is two wires for each signal.
Ground is a common return wire for all of them. If you don't have the ground connected, no current will flow.
  Reply With Quote
Old 7th February 2012, 10:53 AM   #5
diyAudio Member
 
buzzforb's Avatar
 
Join Date: Oct 2010
Location: Burlington, NC
Ok. Once i saw the internal it confirmed my suspicion. Would have been ok if using standard trafo based psu.
  Reply With Quote
Old 7th February 2012, 11:53 AM   #6
marce is offline marce  United Kingdom
diyAudio Member
 
Join Date: Jun 2007
Location: Blackburn, Lancs
The signals require a return current path, I2S is realy designed for use on a single PCB with one contigous ground. How are the return currents going to get back to the source without a GND connection. The best way would be to have a gnd return for each signal kept as close as possible, both through the wire and where they connect on the board.
Otherwise your signals are going to be messy, especialy the clock signal.
  Reply With Quote
Old 7th February 2012, 11:59 AM   #7
diyAudio Member
 
buzzforb's Avatar
 
Join Date: Oct 2010
Location: Burlington, NC
How about the pin 8(V+)? Does it need to be jumpered onboard? I connected the offboard ground pin to the pin4 location onboard and still getting error when trying playback.

Last edited by buzzforb; 7th February 2012 at 12:07 PM.
  Reply With Quote
Old 7th February 2012, 12:09 PM   #8
diyAudio Member
 
Join Date: Jan 2008
Location: Virginia
Did you just asked if you need to connect the "V+" to the ground???
No offense, I think you are over your head in this project.
  Reply With Quote
Old 7th February 2012, 12:38 PM   #9
diyAudio Member
 
buzzforb's Avatar
 
Join Date: Oct 2010
Location: Burlington, NC
None taken. Onboard, all pins had a reference to the ground plane through pin 4. With that chip pulled, i am running wires from onboard holes for pin 1,2,3 and 4. Now the offboard chip has ground reference to main board, with all pins having access to this point through pin 4. All should be working correct? Having a standalone regulated chip supply using a battery supply should not be causing any problems. So why an error signal? Is the fact that the now open pin 8 onboard is without a ground reference a problem?
  Reply With Quote
Old 8th February 2012, 11:59 AM   #10
marce is offline marce  United Kingdom
diyAudio Member
 
Join Date: Jun 2007
Location: Blackburn, Lancs
How long are the wires?
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Connecting SAA7310 to YM3434 znarfomat Digital Source 9 16th April 2006 07:41 PM
Direct Wiring a DDDAC USB-->I2S to a P3A DAC I2S DIN input dkj7a Digital Source 1 26th March 2006 05:46 PM
Add SPDIF on SAA7310/TDA1543 Combination Tubeee Digital Source 7 20th July 2004 03:57 PM
Help : Marantz CD52 HF signal to SAA7310 <1Vp-p tbklbl Digital Source 2 5th January 2004 09:12 AM
I2S Problems maczrool Digital Source 41 18th March 2003 05:28 AM


New To Site? Need Help?

All times are GMT. The time now is 03:56 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2