Data Sheet
Shenzhen Waytronic Electronics Co., Ltd. WT2003S-16S Chip
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3.4.3.2. Specify SD card file index play(A2)
This command can specify to play the audio file in the SD card, influenced by the file storage order,
sorting files according to the index order.
Start code
Length
Command
High order of track
Low order of track
Check code
End code
7E
05
A2
00
01
XX
EF
Note: If the specified track does not exist, it will not influence the current play.
3.4.3.3. Specify SD card file name play(A3)
This command can specify file-name play under the root directory of SD card. (The file name supports 8
characters at most.)
Start
code
Length
Command
File name (from high to low)
Check
code
End
code
7E
07
A3
54‘T’
30(‘0’)
30(‘0’)
32(‘2’)
XX
EF
“54, 30, 30, 32” are ASCII codes of T002. Only file names are in the from of ASCII code while other data
is Hexadecimal; above commands mean T002XXX.mp3 audio file playing in the specified root directory;
only corresponding to the first 4 bits is OK.
3.4.3.4. Index play in the specified SD card folder (A4)
This command can play by file index under the specified root directory (folder name is fixed 5
characters).
Start
code
Length
Command
Folder name(from high to low)
File index(from high to low)
Check
code
End code
7E
0A
A4
‘M’
‘U’
‘S’
‘I’
‘C’
00
01
XX
EF
Only folder name are in the form of ASCII code while other data is Hexadecimal; above commands mean
the second audio play (index number is 0001) in the MUSIC folder under the specified root directory.
3.4.3.5. Index play in the specified U disk root directory (A6)
This command can specify to play the audio file of U disk, influenced by the file order, sorting files
according to the index order.
Start code
Length
Command
High order of track
Low order of track
Check code
End code
7E
05
A6
00
01
XX
EF
Note: If the specified track does not exist, it will not influence the current play.