Hi,
I'm trying to connect an iancanada i2S to PCM board to my TDA1541A chip, however I do not get any sound out of the TDA1541A. I'm under the impression I'm missing something basic here.
This is the setup:
Philips CD player PDIF out -> LHY DIR9001 board -> IanCanada i2s PCM - > TDA1541A
I've connected pin 27 on the TDA1541A to -5V for simultaneous mode
The I2S led, on the i2s - PCM board lights up (as do the other two), and also connecting the DIR9001 directly to the TDA (in non-simultaneous mode) results in sound. So it looks the i2s signal comes across, and the issue seems to be somewhere between the PCM board and the TDA1541A. I've tried running the PCM board at half speed and full speed, and I've played around with the clock frequency of the LHY board (at 512 the i2s LED on the PCM board no longer lights up, but at all other frequencies it does).
What am I missing? Can I connect the wires straight from the i2s - PCM board to the chip?
Thanks! Matthew
I'm trying to connect an iancanada i2S to PCM board to my TDA1541A chip, however I do not get any sound out of the TDA1541A. I'm under the impression I'm missing something basic here.
This is the setup:
Philips CD player PDIF out -> LHY DIR9001 board -> IanCanada i2s PCM - > TDA1541A
I've connected pin 27 on the TDA1541A to -5V for simultaneous mode
The I2S led, on the i2s - PCM board lights up (as do the other two), and also connecting the DIR9001 directly to the TDA (in non-simultaneous mode) results in sound. So it looks the i2s signal comes across, and the issue seems to be somewhere between the PCM board and the TDA1541A. I've tried running the PCM board at half speed and full speed, and I've played around with the clock frequency of the LHY board (at 512 the i2s LED on the PCM board no longer lights up, but at all other frequencies it does).
What am I missing? Can I connect the wires straight from the i2s - PCM board to the chip?
Thanks! Matthew
Spent all evening checking all wires and connections, tried a few different TDA1541(A) chips, feeding the DIR9001 and I2S PCM board from a different PS, but all to no avail.
With this board the TDA1541 should be running in simultaneous mode, are there perhaps other best practices I should think off? Places I should look for troubleshooting? Many thanks!
With this board the TDA1541 should be running in simultaneous mode, are there perhaps other best practices I should think off? Places I should look for troubleshooting? Many thanks!
I was hoping to save myself the embarrassment of having to show the current stage of breadboarding, but here you go:
Between all the spaghetti above, this is how the Iancanada board feeds the chip
@eclipsevl good suggestion, I have a DMM and an (ancient) scope, let me see if there are signals at the TDA1541 pins.
Between all the spaghetti above, this is how the Iancanada board feeds the chip
@eclipsevl good suggestion, I have a DMM and an (ancient) scope, let me see if there are signals at the TDA1541 pins.
You must slave the I2S to PCM with the Mclk on the dedicated uf-l pad, but weither it is conected it should works as you didn't forget the gnd link between the TDA DGND aera and the PCM board ?!
Thanks! That jumper setting was in a desperate attempt to run the pcm at half speed. (Then pin 3 should also be shorted). I’ll double check the digital ground, but I think I got that connected (note I’m using the connector pins not those fancy if-I pads 🙂 )
In the meantime I’ve also measured a block wave on the clock pin, however I also see that same block when measuring between the different grounds, so something funny going on there. Will post back when I’ve located the source of that! Thanks in any case much appreciated!
In the meantime I’ve also measured a block wave on the clock pin, however I also see that same block when measuring between the different grounds, so something funny going on there. Will post back when I’ve located the source of that! Thanks in any case much appreciated!
Btw, maybr you can help : I remember there was a trick posted on that to makethat board in true 16 bits for the TDA1541A ? Do you remember where it is perhaps ! Is it what you tried ?
The half speed is not recommended unless the DAC cannot keep up, so I don’t think it’s worth pursuing🙂
In my case no fancy tricks I’m just trying to run the DAC in simultaneous mode.
In the meanwhile I disconnected everything except for the regulators, and what I thought was a clock signal seems to be regulator related
In my case no fancy tricks I’m just trying to run the DAC in simultaneous mode.
In the meanwhile I disconnected everything except for the regulators, and what I thought was a clock signal seems to be regulator related
I cleaned up the spaghetti a bit, more like noodles now and measured some more.
I was not sure what to measure at the DAC pins, but for comparison I also measured the output of the DIR9001 board. There I see ~200mv RMS, also when I toggle between inputs on that board I see the wave form of the clock signal change.
The above screenshot shows a blip of a few milivolts, but noise compared to the 200mV RMS, in other words there is data going into the i2s-pcm board, but no data out 🙂
From the DIR9001 board I take the following signals:
GND, MCLk, LCRK and Data, that should suffice right?
And then I take the following outputs:
DR, DL, LLLR, CLK, and G.
Any clues more than welcome. I’ll be away a few days so don’t read into when I’m slow in responding, thanks again!
I was not sure what to measure at the DAC pins, but for comparison I also measured the output of the DIR9001 board. There I see ~200mv RMS, also when I toggle between inputs on that board I see the wave form of the clock signal change.
The above screenshot shows a blip of a few milivolts, but noise compared to the 200mV RMS, in other words there is data going into the i2s-pcm board, but no data out 🙂
From the DIR9001 board I take the following signals:
GND, MCLk, LCRK and Data, that should suffice right?
And then I take the following outputs:
DR, DL, LLLR, CLK, and G.
Any clues more than welcome. I’ll be away a few days so don’t read into when I’m slow in responding, thanks again!