Hi,
I have Philips CD614 cd player in excellent condition with Mitsubishi M50423FP processor inside which, among other things, acts as digital filter and Philips TDA1543 dac. My question is which of dac interface modes I should select for nonoversampling filterless mode of operation (among modes 2,4 and 9, right?) which will correspond to I2S?
Link for M50423FP datasheet...
http://www.datasheetarchive.com/pdf/2135132.pdf
I have Philips CD614 cd player in excellent condition with Mitsubishi M50423FP processor inside which, among other things, acts as digital filter and Philips TDA1543 dac. My question is which of dac interface modes I should select for nonoversampling filterless mode of operation (among modes 2,4 and 9, right?) which will correspond to I2S?
Link for M50423FP datasheet...
http://www.datasheetarchive.com/pdf/2135132.pdf
Update...from TDA1543 datasheet "...the most significant bit (bit 1) must always be first" so that rules out dac interface mode no. 4 as that one is LSM first, therefore I'm left with interface mode 2 & 9...Could someone help me what I should look for as I'm not able to figure out from I2S time diagram?
Thank for repay Tico, but inside cd player already is TDA1543 and is fed from M50423FP with 4fs signal, and I don't want EIAJ format for TDA1543A, I just want 1fs I2S signal from M50423FP that can be digest by TDA1543 (or TDA1541A eventually).
I'm reasonably sure that Philips players with this Mitsubishi chip have the A version of the dac.
sp
sp
...but I'm reasonably sure that Philips player in front of me and service manual at my screen with this Mitsubishi chip have the non A version of the dac 😀
Just for the record, a few years ago, while I was experimenting with 4 x TDA1543 in parallel with 8VDC from W.Jung SupeRegulator, passive I/V conversion, fed from the same M50423FP chip with 4fs, the sound was excellent.
From M50423FP datasheet can be seen that in mode 6 it supports dual dac operation in 4fs. What that exactly means, does this mean that one can use two TDA1543's and get differential output of single channel in each chip in elegant, easy way? If that is so, how to connect them to M50423FP (you see, differential configuration is of more interest to me than nonos)?
aparatusonitus said:
No. It is intended for the likes of the PCM56 and the AD1856 though with a bit of work it could be made to work with the TDA1541 in simultaneous mode.
Like mode 2 + I2S splitter (HEF4562 + 74HC132 +74HC157) for 1fs or mode 5 + I2S splitter (HEF4517 + 74HC132 +74HC157) for 4fs?
No, like not using the 1541 in I2S mode 
edit: not shure if the coding of the data is compatible, can't find it quickly.
And you need glue logic.
edit: not shure if the coding of the data is compatible, can't find it quickly.
And you need glue logic.
Hi aparatusonitus,
can you send me the CD614 service manual? ...... thanks
After almost 2 years (d'oh) I realise that this lowly M50423FP seems to be able to support the 1543 and 1543A versions so must be able to connect directly to dacs using the philips or japanese version of I2S and with various levels of oversampling.
If this is correct it seems to be quite useful and I'm wondering about it's quality. Any views?
sp
can you send me the CD614 service manual? ...... thanks
After almost 2 years (d'oh) I realise that this lowly M50423FP seems to be able to support the 1543 and 1543A versions so must be able to connect directly to dacs using the philips or japanese version of I2S and with various levels of oversampling.
If this is correct it seems to be quite useful and I'm wondering about it's quality. Any views?
sp
Just send me a pm and I'll forward Philips CD614 service manual, no probs🙂
For I2S 1Fs output you need to (as per M50423FP datasheet, page 18, table 1, mode 2) disconnect pins 8 and 10 from Vcc (I've just cut a line to Vcc few mm from pins 8/10), solder pins 8/9/10 together to gnd (pin 9 is already low/grounded) and finally desolder pin 11 from gnd/pcb, put it in the air and connect it wit short wire to Vcc.
Last edited:
fs and direct clocking DAC?
Hi,
I also tweaked my cd614 with all kinds of mods, one of them is the non oversampling mod from 4fs to fs. With 4fs I clocked the DAC direct with the Tentclock on pin 1. Now with fs that does not work anymore and I had to clock it from the M50423FP again wich I don't like.
Any thoughts anyone? Can I use MODE 9 for that and clock the DAC direct?
Bas.
Hi,
I also tweaked my cd614 with all kinds of mods, one of them is the non oversampling mod from 4fs to fs. With 4fs I clocked the DAC direct with the Tentclock on pin 1. Now with fs that does not work anymore and I had to clock it from the M50423FP again wich I don't like.
Any thoughts anyone? Can I use MODE 9 for that and clock the DAC direct?
Bas.
fs and direct clocking DAC?
Hi,
I also tweaked my cd614 with all kinds of mods, one of them is the non oversampling mod from 4fs to fs. With 4fs I clocked the DAC direct with the Tentclock on pin 1. Now with fs that does not work anymore and I had to clock it from the M50423FP again wich I don't like.
Any thoughts anyone? Can I use MODE 9 for that and clock the DAC direct?
Bas.
Hi,
I also tweaked my cd614 with all kinds of mods, one of them is the non oversampling mod from 4fs to fs. With 4fs I clocked the DAC direct with the Tentclock on pin 1. Now with fs that does not work anymore and I had to clock it from the M50423FP again wich I don't like.
Any thoughts anyone? Can I use MODE 9 for that and clock the DAC direct?
Bas.
- Status
- Not open for further replies.