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Messages - CharlieC

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1
General Board / Re: vs1011e won't run
« on: 03.02.2007 at 16:52:56 »
Just to tidy up this hanging thread:  yes, of course, you need an external crystal for this device.  I had completely mis-read the data sheet.  I suppose its using a lot of PICs with internal clock oscillators that has spoilt me.  I now have a working system with crystal clear music, thanks to you!

Cheers and best wishes to all.
Charles

2
General Board / Re: vs1011e won't run
« on: 19.01.2007 at 20:51:57 »
Ah hah, on re-reading the various parts of the data sheet I can now see where I have gone wrong!  Very many thanks Michael, I think you've just put me on the right track.

The mp3 player I am building is based on a 16F877 chip, reading from a compact flash card.  I thought the vs1011e was going to be the easy bit but I've wasted quite a lot of time on it so far.  I'll try an external crystal next week and let you know.

Again, thanks a million.

(I like the look of your new mp3 player, small isn't it?)

Best wishes
Charles

3
General Board / Re: vs1011e won't run
« on: 19.01.2007 at 20:18:28 »
Page 25 of the data sheet says: "24.0MHz internal clock is enough is enough for vs1011e to be able to decode all bitrates and sample rates with bass enhancer and treble control active".  There are other references, one says that if you are using the internal clock then there is no need to set the register that gives small degrees of clock change.

Regards
Charles

4
General Board / Re: vs1011e won't run
« on: 19.01.2007 at 14:31:11 »
Forgot to mention: TEST is pulled high too.
Charles

5
General Board / vs1011e won't run
« on: 19.01.2007 at 14:11:09 »
Hi guys

New to this board, regards to all.

 I have just added a vs1011e (48 pin quad flatpack, on jelu 48 pin adapter board) to an mp3 project.  All the digital and analogue voltages are present (3.29v) and all the grounds are correct.  I want to use the internal osc so have connected pins 17 and 18 together.  TEST is connected to +vdd (3.29v) and all suggested pulldowns are there.  RESET is high: my software now pulls it low for 0.5 sec then high for 0.5 sec, in a loop so I can check things.  RCAP is always 0v.  GBUF is always 0v.  The XTAL0,1 pins (joined) go low when RESET goes low.

The datasheet seems to suggest that simply applying power should cause a few things to happen (RCAP goes to 1.5v or similar).  I have put a scope on the osc pins and can see nothing except they go to 0v when RESET is low. I don't have to load any registers to get things moving, do I?

As an experienced engineer I am now at a loss, except to think that the chip is bad, which would be unlikely.

Any help greatly appreciated
Charles

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