So if you look into the difference between the different format, the only difference is the timing of the data signal during the LRclock cycle. For 16 bit, if you delay the LRCLK signal of a Sony ( aka EIAJ ) signal by 7 BCK cycles, and invert it as well, you will fool the DAC into thinking it is a I2S signal. This can be done easily with a simple shift register.
To convert from I2S to Sony ( aka EIAJ ), the delay the Data of the I2S by 7 BCK cycles, and invert the LRCLK. This will foll the DAC to think that the signal is EIAJ rather than I2S.
My implementation of the shift register for a EIAJ to I2S is as attached:
To convert from I2S to Sony ( aka EIAJ ), the delay the Data of the I2S by 7 BCK cycles, and invert the LRCLK. This will foll the DAC to think that the signal is EIAJ rather than I2S.
My implementation of the shift register for a EIAJ to I2S is as attached:
Attachments
found my original post. Schematic, PCB and circuit description somewhere along the thread.
http://www.diyaudio.com/forums/showthread.php?s=&threadid=25177&perpage=10&highlight=&pagenumber=4
http://www.diyaudio.com/forums/showthread.php?s=&threadid=25177&perpage=10&highlight=&pagenumber=4
Why don't you use a scoket and try various types. Some people can tell the diference between different types but I cannot. To me logic is logic. I used 74F04 and 74HC04 with no problem. Actaully, I think any high speed 74xx04 will work. Similarly for the 74374. The max freq is only 2.12MHz which is easily handled by any TTL circuit.
CM
CM
TDA1541A: I2S and EAIJ?
I don't quite see why it's needed to convert the I2S signal into EIAJ because the TDA1541A can be operated in both modes, right? Ok, so the spec sheet doesn't really say that the "EIAJ" mode corresponds to the "MUX OB" mode. Can anyone tell me if the "MUX OB" mode is the Sony format? The thing is that I have a Sony cd-player which I'd like to modify.
I don't quite see why it's needed to convert the I2S signal into EIAJ because the TDA1541A can be operated in both modes, right? Ok, so the spec sheet doesn't really say that the "EIAJ" mode corresponds to the "MUX OB" mode. Can anyone tell me if the "MUX OB" mode is the Sony format? The thing is that I have a Sony cd-player which I'd like to modify.
Here are two different 300dpi PNGs containing single sided PCBs for cm's EIAJ to I2S converter. The first is bigger and requires tons of jumpers and the second is smaller, has bigger traces, but the jumpers need to be wires instead of resistor leads(longer). These are my two first PCBs, done using ExpressPCB and a slightly modified version of FreePDF to print PNGs instead(More programs can be used to remove the grid). I removed the ExpressPCB grid in the second version only.
Here
http://www.diyaudio.com/forums/showthread.php?postid=297035#post297035
for the scheme
http://www.diyaudio.com/forums/showthread.php?postid=699972#post699972
for the sch and pcb files for ExpressPCB. V2 uses the same scheme, but the PCB file for v2 is not in the post I linked.
http://www.diyaudio.com/forums/showthread.php?postid=297035#post297035
for the scheme
http://www.diyaudio.com/forums/showthread.php?postid=699972#post699972
for the sch and pcb files for ExpressPCB. V2 uses the same scheme, but the PCB file for v2 is not in the post I linked.
Hello
As CXD2500 spit out EIAJ format-> PCM1798 can only accept I2S, Leftjustified or standard 16 or 24 bit format.
What if using DF1704 instead off EIAJ to I2S converter
Am I being confused here?
Kim
PS: PCM1798 datasheet http://focus.ti.com/lit/ds/symlink/pcm1798.pdf
As CXD2500 spit out EIAJ format-> PCM1798 can only accept I2S, Leftjustified or standard 16 or 24 bit format.
What if using DF1704 instead off EIAJ to I2S converter
Am I being confused here?
Kim
PS: PCM1798 datasheet http://focus.ti.com/lit/ds/symlink/pcm1798.pdf
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