Is anybody can help me with my PCM2702

burderly · 1st August 2006, 06:20 AM

I took PCM2702 with wire in a circuit board. At first, I forgot to give 3.3V to 2 and 4 feet of PCM2702. When I connected it with USB port of computer, it appeared unknown device in my computer. At this level I remembered the status of PLAYBACK and SSPND, the LED to these two feet was normal.
When I gave 3.3V to 2 and 4 feet of PCM2702, I found the LED to PALYBACK did not brighten but the other SSPND could. I checked it many time and anywhere of the circuit, but I could not find the reason and I am very strange that the voltage in PLAYBACK foot is 3.3 always. I want to know any guys have good idea for this problem. Thanks.
Another thing, I do not very sure if I connected the correct way for the CLOCK OSCILLATOR, I checked the voltage at XTI was 1.78V and XTO was 2.8V, are there correct?

burderly · 1st August 2006, 08:51 AM

I took PCM2702 with wire in a circuit board. At first, I forgot to give 3.3V to 2 and 4 pin of PCM2702. When I connected it with USB port of computer, it appeared unknown device in my computer. At this level I remembered the status of PLAYBACK and SSPND, the LED to these two pins was normal.
When I gave 3.3V to 2 and 4 pin of PCM2702, I found the LED to PALYBACK did not brighten but the other SSPND could. I checked it many times and anywhere of the circuit, but I could not find the reason and it¡¯s very strange that the voltage in PLAYBACK pin is 3.3 always. I want to know any guys have good idea for this problem. Thanks.
Another thing, I am not very sure if I connected the correct way for the CLOCK OSCILLATOR, I checked the voltage at XTI was 1.78V and XTO was 2.8V, are there correct?

burderly · 1st August 2006, 03:09 PM

pic

Akira386 · 3rd August 2006, 11:34 PM

Schematic?

burderly · 5th August 2006, 03:51 PM

Quote:

Originally posted by Akira386
Schematic?

At first I used 4 pins CLOCK OSCILLATOR, now I changed it with 2 pins CLOCK OSCILLATOR, and it work very well, the sound is very good too.

1st August 2006, 06:20 AM	#1
burderly diyAudio Member Join Date: Feb 2005 Location: GuangZhou	Is anybody can help me with my PCM2702 I took PCM2702 with wire in a circuit board. At first, I forgot to give 3.3V to 2 and 4 feet of PCM2702. When I connected it with USB port of computer, it appeared unknown device in my computer. At this level I remembered the status of PLAYBACK and SSPND, the LED to these two feet was normal. When I gave 3.3V to 2 and 4 feet of PCM2702, I found the LED to PALYBACK did not brighten but the other SSPND could. I checked it many time and anywhere of the circuit, but I could not find the reason and I am very strange that the voltage in PLAYBACK foot is 3.3 always. I want to know any guys have good idea for this problem. Thanks. Another thing, I do not very sure if I connected the correct way for the CLOCK OSCILLATOR, I checked the voltage at XTI was 1.78V and XTO was 2.8V, are there correct? __________________ flying without wings

1st August 2006, 08:51 AM	#2
burderly diyAudio Member Join Date: Feb 2005 Location: GuangZhou	I amend some grammar mistake I took PCM2702 with wire in a circuit board. At first, I forgot to give 3.3V to 2 and 4 pin of PCM2702. When I connected it with USB port of computer, it appeared unknown device in my computer. At this level I remembered the status of PLAYBACK and SSPND, the LED to these two pins was normal. When I gave 3.3V to 2 and 4 pin of PCM2702, I found the LED to PALYBACK did not brighten but the other SSPND could. I checked it many times and anywhere of the circuit, but I could not find the reason and it¡¯s very strange that the voltage in PLAYBACK pin is 3.3 always. I want to know any guys have good idea for this problem. Thanks. Another thing, I am not very sure if I connected the correct way for the CLOCK OSCILLATOR, I checked the voltage at XTI was 1.78V and XTO was 2.8V, are there correct? __________________ flying without wings

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3rd August 2006, 11:34 PM	#4
Akira386 diyAudio Member Join Date: May 2005 Location: Sao Paulo	Schematic?