digital output

[glewis4744]

I purchased a Magnavox CDB-480 and 482 single box cd players and would like to add a digital output to drive a outboard DAC. The cd player have a Phillips SAA7210 A chip, a Motorola XC99659P (CD-88 P105) B chip I think, and the DACs are TDA-1543. I also own a Magnavox CDB 582 single box cd player and I took the signal off pin 14 of the SAA-7220 filter chip and reduced the amplitude to .5 volts pp. I think I have provided enough info, if not email me for specific info to complete this project.

George

 

[guido]

George,

I think there were early philips (=magnavox) players out there without the filter. No oversampling! The motorola chip might be only the system controller. Check if the I2S signals from the TDA1543 come from the 7210 or the motorola chip.

If they come from the 7210, or the Mot chips is the dig filter but has no spdif out, you need to implement a chip to give you spdif out. Crystal makes them, the opposite of a 8412 so to say.

Greetings,

Guido B.

 

[michael_nipomo]

Digital or spdif output for cdb 480, 482 , 262, 502

Does anyone know of a Mod to add digital or spdif output to those Magnavox cdb units that have the 1543 and the saa7210. Is there a written detail description of a mod of that type? Does anyone have kit or pcb for such a mod?

 

[Bill Fuss]

Working from memory, the 502 has SPDIF available on pin 4 of the M50423fp processor chip. None of the others has SPDIF in them, AFAIK. You would have to add an encoder chip, as has been mentioned.

Best, Bill

 

[abraxalito]

If you're not afraid of getting your hands dirty (i.e. a true diyer ) then you could make a start with this article about spdif on a Parallax Propellor.

S/PDIF Digital Audio on a Microcontroller : scanlime

I have a plan to use an LPC1113 as an spdif transmitter at some point, but haven't got around to coding it yet. I think its cheaper than the Parallax.