D/A converter YBA special

[maxpou]

Hi,
i have a YBA special with teac CDP1100 inside and i wanted to change D/A converter by PCM1725 but does not function. I don't have sound to output. i cannot send you my old D/A datasheet because is too big. Somebody can help me? Thank You!
Maxpou

old D/A datasheet: http://www.datasheetcatalog.com/datasheets_pdf/K/D/A/0/KDA0316.shtml

DSP: http://www.datasheet4u.com/html/K/S/9/KS9211_Samsungsemiconductor.pdf.html

pcm1725: http://focus.ti.com/docs/prod/folders/print/pcm1725.html

 

[Kochkurov Maxim]

KS9211 has RJ output format with 48 x BCK. PCM1725 understand only RJ with 64x BCK and does not understand 64x BCK RJ. You need CPLD to convert from 48xBCK RJ to 64x BCK RJ

 

[maxpou]

thank you

Thank you Kochkurov Maxim,
but i don't understand 48x RJ, what is this RJ and CPLD? Do you know a IC for convert this. Where do you found this information in datasheets. Thank You! Maxpou

 

[Kochkurov Maxim]

RJ=Right Justified , 48x mean that 1 period of LRCK consist 48 clocks of BCK, CPLD = Complex Programmable Logic Device. I don't know IC that convert from 48x to 64x and I suppose that IC don't exist in the world :-( If you want to convert from 48x to 64x, you must use 2 shift registers. 48x data is wrote to first register and ,when it filled, data is transfered into second. From second register data is got out clocked by 64x BCK. At this moment first register receive next data frame. You may realize this structure on CPLD, for example Altera EPM3256ATC144-10 or EPM240T100-10

 

[maxpou]

thank you for the explanations. if i want to change my D/A converter what D/A can be used. I would like to know where do you found this information (48x RJ for KS9211) in datasheet. If i want use PCM1730 he does not function too. thank you! Maxpou

 

[Kochkurov Maxim]

I would like to know where do you found this information (48x RJ for KS9211) in datasheet.

Fig.21 in KS9211 datasheet

 

[maxpou]

Thank you!
but i would like to know too where do you found this information for pcm1725 because i want to ckeck if the pcm1728 or another DAC function with my DSP. thank you! Maxpou

 

[jaycee]

PCM1725 is obsolete and replaced by PCM1754. This does seem to support 48fs right justified 16-bit.

You could also use an ASRC like AD1895 to convert format....

 

[maxpou]

Thank you!
but i would like to know too where do you found this information (48 x RJ ) for pcm1725. Maxpou

 

[maxpou]

Hi,
i try with PCM1754 and it does not function. i have no sound. I selected 16bit RJ, no de-emphasis and mute off. somebody can help me please? Thank you!! Maxpou

 

[maxpou]

pin in pin out

Hi,
somebody can assure me if i have a good pin in and pin out?


KDA0316 vs PCM1754
LRCK = LRCK
WDCK = SCK
DATA = DATA
BIT CK = BCK

THANK YOU!
Maxpou

 

[maxpou]

Hi,
I took some measurement with my scope. For the LRCK i have 88.2Khz, BCK 4.2Mhz and for WDCK 176.4Khz. Somebody confirm to me why it does not function. Thank You! Maxpou

 

[rfbrw]

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