Search found 73 matches

by Hannu
Fri 2019-11-01 16:51
Forum: DSP and Audio Software
Topic: Generating Frequency
Replies: 4
Views: 278

Re: Generating Frequency

If I tracked down to right Arduino library, https://github.com/madsci1016/Sparkfun-MP3-Player-Shield-Arduino-Library uint8_t SFEMP3Shield::enableTestSineWave(uint8_t freq) function is to enable the sine test. It uses the old sine test. Have a look at chapter 10.12.1 of the VS1053 datasheet http://ww...
by Hannu
Mon 2019-07-22 7:55
Forum: VS1010 Forum
Topic: VS1010 as a portable MIDI sequencer composing device
Replies: 3
Views: 242

Re: VS1010 as a portable MIDI sequencer composing device

Hi! I think this will end up as PCB project any way you go. If there was a ready solution, you could by it from some shop :) The VQFN68 package isn't easiest to solder, but it can be done with liberal amount of flux and hot air. The VS1010 doesn't require that much components. Have a look at minidem...
by Hannu
Fri 2019-07-12 8:41
Forum: VS1005 and VSOS Software
Topic: Buck converter for CVDD?
Replies: 3
Views: 286

Re: Buck converter for CVDD?

Hello! This is totally untested, so try and measure. It's true that best efficiency can be gained on CVDD. However this might have bad effects on audio performance if the switcher noise gets through. The recipe to investigate this is to set core voltage some working minimum voltage on given clock fr...
by Hannu
Wed 2019-07-10 7:24
Forum: Slave Decoder Applications
Topic: Schematic & PCB view for VS1003B-L
Replies: 7
Views: 540

Re: Schematic & PCB view for VS1003B-L

Hi!

I Checked that library. It has VS1003.

I took VS1003 from the web pack and saved it to own library. Hopefully this helps. And you get the power and groud pins. There might be the next issue as they are behind invoke symbol... But let's fix that if this library doesn't help.
by Hannu
Mon 2019-07-08 8:28
Forum: Stand-Alone Applications
Topic: Schematic Review for VS1003 application (power supply & signal tieoffs)
Replies: 8
Views: 915

Re: Schematic Review for VS1003 application (power supply & signal tieoffs)

Hi Berry! We haven't done any new VS1003 design in last few years and couldn't find fresh and good BOM to check this out. VS1103 is close relative to VS1003 and the VS1103 module VSMD301 http://www.vlsi.fi/fileadmin/modules/vs1103mod04_sch.pdf has quite close to your capacitor and it uses 22p capaci...
by Hannu
Tue 2019-06-25 15:52
Forum: Slave Decoder Applications
Topic: Compatibility chart
Replies: 0
Views: 839

Compatibility chart

Hello!

I wrote this nice and colorful representation how compatible VS10xx are in voltages and pins. May be useful for someone who debugs designs with different VS10xx chips.
by Hannu
Tue 2019-06-25 15:37
Forum: Stand-Alone Applications
Topic: Schematic Review for VS1003 application (power supply & signal tieoffs)
Replies: 8
Views: 915

Re: Schematic Review for VS1003 application (power supply & signal tieoffs)

Hi , Sorry for the delay, as I’m currently out of town and on travel until next week. 2. Regarding the placement of the caps, yes, I saw a similar schematic in the datasheet. However, looking at the PCB footprint, all the power pins are spread across all edges of the chip, even for the same rail. S...
by Hannu
Tue 2019-06-18 10:01
Forum: Stand-Alone Applications
Topic: Schematic Review for VS1003 application (power supply & signal tieoffs)
Replies: 8
Views: 915

Re: Schematic Review for VS1003 application (power supply & signal tieoffs)

Thanks for the feedback, to follow up 2. So I guess the 10uF are still required in addition to the LDO caps. Where should the 10uF be placed, any recommendations? I understand 1x 100nF caps should be placed each power pin, but where to place the 1x 10uF cap of each rail, beside any particular pin? ...
by Hannu
Mon 2019-06-17 8:34
Forum: VS1005 and VSOS Software
Topic: Memory management issues
Replies: 19
Views: 1064

Re: Memory management issues

Hi! The output is for I, X and Y memory. # is kernel or something which frags doesn't know which library uses that part of memory. The capital letter designates the library reserving the memory area and each letter is 64 words (If I counted right). The key for letters is the libs: line Anyway you ar...
by Hannu
Tue 2019-06-11 8:04
Forum: Slave Decoder Applications
Topic: Schematic & PCB view for VS1003B-L
Replies: 7
Views: 540

Re: Schematic & PCB view for VS1003B-L

Hi Berry, Component you are looking at is VS23S010D-S. And it is memory. There should be all chips which VLSI makes in that library, including VS1003. add_vs1003.png I don't know that much about 3D CADs or Altium, but you can take almost any LQFP48 component and use its 3D model as long as its packa...