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USB to I2S 384Khz - DSD Converter

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#2,182
polaron said:
I tried Amanero with those boards. It works but it is not a good idea because it makes a lot of "plops" and "pops". Use the diyinHK board with vol control. That 4490 dac board also sounds very good with XMOS,. For my surprise, I did not feel the need of amanero, and I can say I am an amanero fan...
Anyway, if you want, I will send you a drawing with the connections. Did this answer help you? Feel free to ask.
Click to expand...



I am having the clicks even with the special long mute AKM Amanero firmware so I have to work out how to mute this externally.
The wiring and connections I have are correct so it is some software issue.
I am using the 7 bit i2c address which I would normally use for Arduino which I think also applies to the Amanero.
 
#2,183
Today assembled my diyinhk ak4490 board with some mods. Looking through datasheets to figure how to connect it to amanero for dsd and pcm playback. Looking at i2c controls of amanero usb board to configure ak4490 board. How do you guys connect amanero to ak4490? Cannot find anywhere on the net for connections and software configuration of those two.

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#2,184
Hi birca1987,

Today assembled my diyinhk ak4490 board with some mods. Looking through datasheets to figure how to connect it to amanero for dsd and pcm playback. Looking at i2c controls of amanero usb board to configure ak4490 board. How do you guys connect amanero to ak4490? Cannot find anywhere on the net for connections and software configuration of those two.
Click to expand...

I may suggest that you look at the datasheet for the AK4490 - available from AKM's website - and the attached amanero preliminary datasheet.

Depending on whether you run the AK4490 in Serial control mode or PCM mode you need to connect different pins. If in PCM control mode (i.e. without an external microcontroller to set internal registers in the AK4490) the pins you need to connect are MCLK, LRCK, SDATA and BICK (AK4490).

The equivalent pins on the Amanero board are pins 3 (SDATA), 4 (BICK), 5 (LRCK) & 6 (MCLK).

Best regards,

Jesper
 

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#2,187
amanero said:
The module is self powered (USB VBUS) in the output connector you have 3.3V from the LDO. For example you can use this pin to know when the cable is plugged.

If you don't like the USB VBUS supply, you can remove the LDO and power the module directly from the 3.3V pin present in the output connector.
Click to expand...

amanero said:
the power consumption is about 600 mW at max speed. LDO near R6 is the right one. P3 is used to erase the flash and force a firmware update via USB.

DSD_OE is 1 when a DSD stream is incoming.

The pin called Mute has been assigned to PIN 11 and is asserted to 1 when a sample rate change is incoming or when there is a stream format change DSD / I2S you can use this pin to avoid noise when the dsd is detected.

The pin 6 is the Master Clock MCLK 22,5792Mhz or 24.576Mhz.

TWC.D is an I2C bus, i m preparing a ConfigTool that let's the user configure Events in the module. For example you can assign I2C address and values to put in the I2C bus when the volume is changing or when a sample rate is changing. blah blah

🙂
Domenico

PS
For each package there is a note with output connector description.
Click to expand...

Could someone confirm if the maximum external supply are 3.3VDC 0.185mA 0.6W?

TIA
Felipe
 
#2,188
Is there a complete firmware history with complete description firmware, not abbreviated? There Amanero Technologies have a very brief description. In OEMTool117 longer firmware versions: 15 for CPLD, 21 for the CPU. We need a complete list with description.

Most likely, the versions up to 1080 had shortcomings. Older versions have some add-ons to the basic version.

Regards, Alexey
 
#2,189
Can somebody please help me diagnosing a problem with my set up? As a way of background everything was working fine until I connected 4 DAC boards to the Amanero in a quad dual mono set up.
Using an AC setting on the multimeter, I measure an output of approx 3.3V on the output pins except the MCLK which measures around 2.1V. Is this normal or have I destroyed the Amanero?


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#2,194
ljufa said:
Has anyone managed to run diyinhk ak4490 board in serial control mode with amanero's i2c?
Click to expand...



I think the main issue here is that the AK4490 chip requires a reset to open the analogue outputs so you have write the "reset" to the register first followed by the actual value you want. Not sure how you can get a time delay with the available Amanero i2c commands.


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