Is it possible to set non os mode in Philips CD130 with M50423FP signal processor? - diyAudio
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Old 11th October 2006, 02:11 PM   #1
Angelm is offline Angelm  Bulgaria
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Default Is it possible to set non os mode in Philips CD130 with M50423FP signal processor?

I found Philips CD130 (dac 1543) in mint condition, so I want to upgrade to non os mode.
Unfortunately, it is with Mitsubishi M50423FP signal processor.
In the PDF I found on page 17/18 described available mode.
Now it is set mode 5.
Do you think, it is possible to set mode 7 or 9.
Will this have effect on digital out - pin 4 DOTX

Sorry bother you with this strange processor.


http://www.datasheet4u.com/download.php?id=551540
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Old 11th October 2006, 06:34 PM   #2
singa is offline singa  Singapore
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Hi,
I read the datasheet of m50423fp.
For Fs or nos tda1543 MSB 1st.
Mode 7 is interpolation - For use with external digital filter.

That leaves mode 2 or 9. Fs bypass filter. Timing different.

Pin 4 DOTX = spdif.

You can hardwire to get what you want.Just follow the table 1.

1=Vcc or 0=Gnd. DASEL 1 - 4
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Old 13th October 2006, 03:49 PM   #3
Angelm is offline Angelm  Bulgaria
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Thank you singa,
I will try mode 9.
Anyone else has Close Encounters of the Third Kind
with this Mitsibushi processor ?
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Old 8th January 2007, 07:14 AM   #4
schtef is offline schtef  Croatia
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Default is it working?

I recently obtained a Philips 614 cd player with the same M50423FP ic. Have you managed to get non oversampled signal from the mitubitshi dsp? Which mode should i try?

Thnx
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Old 8th January 2007, 08:53 AM   #5
tubenut is offline tubenut  South Africa
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Would be keen to know as well, have a 614 also.
How does one change modes? Different pins to ground or Vs?
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Old 9th January 2007, 03:15 PM   #6
Angelm is offline Angelm  Bulgaria
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Hi schtef,
I haven't manage to set nos mode, yet.
I think, there are connections under chip on the board.
So the DASEL pins have to be desoldered, by air solder,
which i am looking for ....
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Old 9th January 2007, 03:23 PM   #7
Cobra2 is offline Cobra2  Norway
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Or just lift the mode-change-legs?
(maybe attach thin wires to the legs for testing)

Arne K
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Old 10th January 2007, 06:48 AM   #8
Angelm is offline Angelm  Bulgaria
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Quote:
Originally posted by Cobra2
Or just lift the mode-change-legs?
(maybe attach thin wires to the legs for testing)

Arne K

It's just my idea :-)
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Old 10th January 2007, 08:46 AM   #9
schtef is offline schtef  Croatia
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First I have to finish my dac. It's still on paper . Then I'll try with the dasel pins. Had the same idea with the pins.
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