lscangus said:
The SAA70x0 chipset is a first generation chipset and has absolutely no native support for SPDIF. Adding a SPDIF output of any kind cannot be considered a mod. It is a small digital design problem and unless you use programmable logic, and I don't mean PALs or GALs, you are looking at a lot of TTL ICs. It would be easier to mod the dac and have it accept simultaneous L/R data and clock.
If, OTOH, you insist on going down this path the next thing you need to do select an SPDIF transmitter and download the datasheet as that wiil determine the required logic. You will also need to work out how much space is available in the CD player.
lscangus said:
There may well be something out there as it has cropped up in usenet on occasion but I have nothing fit for human consumption.
I do believe the CD player in question is a CD54. It is similar in size to a CD104. If I am to fit anything into my '104, it will have to be SMD and that calls for a PCB. Buying another CD player may well prove to be a cheaper option.
Hi rfbrw, I'm also interested in this, and was hoping for a report on how you got on?
Very interested...
But my electronic know-how is a little limited, mostly self taught on early Philips players, so talk s-l-o-w-l-y.
Now is the time for new chalenges, adding SPDIF (or I2S possibly?)
and I second Iscangus: please help
Cheers
philippe
Those old chip set
SAA7000
SAA7010
SAA7020
usualy comes with CDM-0 transport
whthout a loader, but all mechanism goes in and out
during disc loading...
Like Philips CD303
and Revox B225 (maybe a CDM-1 i do not know exactly)
probably with 4x oversampling with SAA7020...
but type of the transport is from non importance for this topic...
The old chip SAA 7010 is predecessor of newer SAA 7210 from whom
we can get I2S bus.
But from SAA 7010 we coudnt because the cip is designed to drive
14bit DAC TDA1540 with different type of input digital signal
(check in data files...).
I think that SAA7010 runs at 4.xxx MHz clock, ws SAA7210 is higher...
You can try to drive the TDA1541A with SAA7010 by choosing the right format
input by option (see the TDA1541 datas...) and perform a better IV conversion,
or avoid oversampling (SAA7020) and leave the very unique DAC TDA 1540,
with of course better IV stage and changed decoupling capacitors...
But if Your intension was to use device just like exelent transport mechnism,
it is very hard to achieve this, mostly because of lack of the phisical space in those old machines.
That is peety because I was interested in that idea too...
But maybe some of DIYs can design the circuit for this that will be of great help
for many people i am positive about that...
By
SAA7000
SAA7010
SAA7020
usualy comes with CDM-0 transport
whthout a loader, but all mechanism goes in and out
during disc loading...
Like Philips CD303
and Revox B225 (maybe a CDM-1 i do not know exactly)
probably with 4x oversampling with SAA7020...
but type of the transport is from non importance for this topic...
The old chip SAA 7010 is predecessor of newer SAA 7210 from whom
we can get I2S bus.
But from SAA 7010 we coudnt because the cip is designed to drive
14bit DAC TDA1540 with different type of input digital signal
(check in data files...).
I think that SAA7010 runs at 4.xxx MHz clock, ws SAA7210 is higher...
You can try to drive the TDA1541A with SAA7010 by choosing the right format
input by option (see the TDA1541 datas...) and perform a better IV conversion,
or avoid oversampling (SAA7020) and leave the very unique DAC TDA 1540,
with of course better IV stage and changed decoupling capacitors...
But if Your intension was to use device just like exelent transport mechnism,
it is very hard to achieve this, mostly because of lack of the phisical space in those old machines.
That is peety because I was interested in that idea too...
But maybe some of DIYs can design the circuit for this that will be of great help
for many people i am positive about that...
By