Broken USB DAC (XMOS/PCM5102)

[magicwolf]

Hi!

I buy dac:
http://www.mistertao.com/beta/pages/ite ... 56776.html
But this usb dac not defined as a device in Windows XP. I attach an usb-cable, to shine a light-emitting diode 384K, but the new device in Windows XP doesn't appear.

I'm trying to understand why does not work DAC. I found that the frequency of 13Mhz resonator has the form of a sine instead of a rectangle and this sinusoidal signal is applied to pin 9 CLK XMOS chip and no frequency signal to pin 1 on the chip CLKOUT USB3320. Is that correct?

Sergey

[Ross]

You should probably contact the module provider for support or return if it is faulty.

This forum is for people programming and designing for xmos devices rather than end users.

[magicwolf]

Thanks for the response. I addressed to the supplier - he can't help. As I didn't work with XMOS me some details of operation of XMOS therefore I ask them to tell interest. Sorry, if I was mistaken with a forum.

[Ross]

Thanks for the response. I addressed to the supplier - he can't help. As I didn't work with XMOS me some details of operation of XMOS therefore I ask them to tell interest. Sorry, if I was mistaken with a forum.

No problem, if you'd like to get involved with programming the device we'd be glad to have you on board! :)

The first step would be getting JTAG access to the chip and acquiring an XTAG.

[magicwolf]

The first step would be getting JTAG access to the chip and acquiring an XTAG.

Forgive, but I understood nothing ;( ;).
I found that on pin REFCLK (usb3320) is a frequency and frequency is absent on pin CLKOUT. Therefore not data on ULPI. It is necessary to replace usb3320. Thanks for the help!