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Old 30th March 2007, 10:16 PM   #1
maxpou is offline maxpou  Canada
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Default D/A converter YBA special

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/data.../KDA0316.shtml

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

pcm1725: http://focus.ti.com/docs/prod/folder...t/pcm1725.html
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Old 31st March 2007, 03:53 PM   #2
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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
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Old 31st March 2007, 05:07 PM   #3
maxpou is offline maxpou  Canada
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Default 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
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Old 31st March 2007, 06:10 PM   #4
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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
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Old 31st March 2007, 07:28 PM   #5
maxpou is offline maxpou  Canada
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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
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Old 1st April 2007, 04:19 AM   #6
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Quote:
I would like to know where do you found this information (48x RJ for KS9211) in datasheet.
Fig.21 in KS9211 datasheet
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Old 1st April 2007, 02:15 PM   #7
maxpou is offline maxpou  Canada
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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
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Old 1st April 2007, 02:45 PM   #8
jaycee is offline jaycee  United Kingdom
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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....
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Old 2nd April 2007, 11:46 AM   #9
maxpou is offline maxpou  Canada
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Thank you!
but i would like to know too where do you found this information (48 x RJ ) for pcm1725. Maxpou
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Old 3rd April 2007, 11:45 PM   #10
maxpou is offline maxpou  Canada
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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
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