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PDF VS1003B Data sheet ( Hoja de datos )
| Número de pieza | VS1003B | |
| Descripción | 16/32-Button Player | |
| Fabricantes | VLSI | |
| Logotipo |  |
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VLSI
Solution y
Controlled Document
VS1003B 16/32-Button Player
VSMPG “VLSI Solution Audio Decoder”
Project Code:
Project Name: VSMPG
Revision History
Rev. Date Author
1.06 2010-08-31 PO
1.05 2009-03-02 PO
1.04 2008-03-20 PO
1.03 2008-01-25 PO
1.02 2008-01-10 PO
1.01 2007-11-02 PO
1.00 2007-10-26 PO
Description
coff2boot.exe and perl.exe in the source package
(use ”make bins” to compile and generate images).
SD-card mini player sources added. Shuffle added.
Changed the polynomial fit for 32-button detection.
Source code packet added, but no instructions yet.
Improved responsiveness of the buttons.
Increased MMC/SD SEND OP COND timeout.
32-button version and saving of song added.
First version with 16 buttons.
Rev. 1.06
2010-08-31
Page 1(12)
1 page  
VLSI
Solution
PO
y
VS1003B 16/32-Button Player
VSMPG
3. 16-BUTTON USER INTERFACE
3 16-Button User Interface
10k
B13
10k
B14
10k
B15
10k
B16
10k
10k
B9
10k
B10
10k
B11
10k
B12
10k
B5
10k
B6
10k
B7
10k
B8
10k
B1
10k
B2
10k
B3
10k
B4
VS1003
optional LED
xCS
xDCS
SI
SCLK
DREQ swMOSI
1 kOhm
minimum
GBUF
LINE
1n
Figure 3.1: 16-button interface connection
A 16-button interface is implemented with 16 buttons and a 17 resistors. A 1 nF capacitor
is used for noise filtering and to bias the LINE input. There are no other connections
than shown here in the LINE input pin. Supply voltage for the resistor ladder is taken
from GBUF to remove chip-to-chip gain variation in AD conversion. The GBUF pin has
additional connections, as it is also used as the common voltage for the headphones.
Only one button is detected simultaneously. If two adjacent buttons are pressed, normally
one of them is detected. The user interface provides the most needed controls.
Button Short Keypress Long Keypress
B1
Volume down
Volume down
B2 Volume up
Volume up
B3 Pause/Play
Play mode: Toggle loudness
Pause mode: Toggle shuffle play
B4 Previous song
B5 Next song
B6 Song #1
B7 Song #2
.. ..
B16 Song #11
The number of buttons can also be 32 (continue the button chain by adding 16 buttons
and 10 kΩ resistors for each). Remember to use the right EEPROM image (player1003-
32but.bin or player1003nw-32but.bin).
A LED indicates system activity. In play mode a long blink of the LED indicates loudness
ON, in pause mode a long blink indicates shuffle play ON. Otherwise the LED shows
MMC activity. In pause mode the LED lights up dimly.
Rev. 1.06
2010-08-31
Page 5(12)
5 Page 
VLSI
Solution
PO
y
VS1003B 16/32-Button Player
VSMPG
7. PLAYING ORDER
7 Playing Order
The playing order of files is not the same order as how they appear in Windows’ file
browser. The file browser sorts the entries by name and puts directories before files. It
can also sort the entries by type, size or date. The standalone player does not have the
resources to do that. Instead, the player handles the files and directories in the order
they appear in the card’s filesystem structures.
If the filename suffix does not match any of the valid ones for the specific chip, the file is
ignored.
Normally the order of files and directories in a FAT filesystem is the order they were
created. If files are deleted and new files added, this is no longer true. Also, if you copy
multiple files at once, the order of those files can be anything. So, if you want a specific
play order: 1) only copy files into an empty card, 2) copy files one at a time in the order
you like them played.
There are also programs like LFNSORT that can reorder FAT16/FAT32 entries by dif-
ferent criteria. See ”http://www8.pair.com/dmurdoch/programs/lfnsort.htm” .
The following picture shows the order in which the player processes files. First DIR1 and
then DIR2 has been created into an empty card, then third.jpg is copied, DIR3 is created
and the rest of the files have been copied. song.mid was copied before start.wav, and
example.mp3 was copied before song.mp3 because they appear in their directories first.
Root
DIR1/
DIR2/
song.mid
start.wav
1
2
example.mp3 3
song.mp3 4
third.jpg
DIR3/
jump.wma
fourth.wma 6
5
Figure 7.1: Play Order with subdirectories
Because DIR1 appears first, all files in it are processed first, in the order they are located
inside DIR1, then files in DIR2. Because third.jpg appears in the root directory before
DIR3, it is next but ignored because the suffix does not match a supported file type, then
files in DIR3, and finally the last root directory file fourth.wma.
Rev. 1.06
2010-08-31
Page 11(12)
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet VS1003B.PDF ] | |
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