Data Sheet

Shenzhen Waytronic Electronics Co., Ltd. WT2003S-16S Chip
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Combination play means that continue sending 10 or less music group code to WT200S-16S.
WT2003S-16S plays audio in turn, according to the sequence of receiving code The difference from
directly sending file name to control music play is that before finishing playing music, send the next code,
it will not be interrupted. After receiving command, it will do FIFO processing.
For example: When WT2003S-16S continues receiving seven groups of data 7E 04 B0 01 B5 EF”,
“7E 05 B0 00 01 B6 EF”, “7E 05 B0 00 02 B7 EF”, “7E 05 B0 00 03 B8 EF”, “7E 05 B0 00 04 B9 EF”,
“7E 05 B0 00 05 BA EF”, ”7E 04 B0 FF B3 EF”, it will specify to play the first, second, third, fourth, fifth
audio file in SD card. 7E 04 B0 01 B5 EF is start code, 7E 04 B0 FF B3 EF is end code.
Note:
1. Before combination play, if want to play file in other storage, you must first send specified storage
play command (that is, mark word of start code), then send the latter audio command to realize
combination play or directly switch mode.
Mark word:00 stands for inserting the specified index address in SPI-FLASH.
01 stands for inserting the specified index address in SD card.
02 stands for inserting the specified index address in U disk.
2. For continuous combination play, support 10 groups at most. During playing, if there is new play
command, it will be interrupted and execute new command.
Note:
1. Timeout judgment: for example: if only send the code 7E 04 B0 01 XX EF, after code receiving is
finished, start timing; if timekeeping over 3s with no response, need to delete relative information.
2. After sending 7E 04 B0 01 XX EF, if receiving 7E 06 B0 01 00 01 XX EF and other command, delete
the recorded time and re-timing again until exceeding 10 groups, or receiving the end code or waiting
more than 3s. If start code and address code are received, but end code is not received, after overtime
or over 10 commands, it will directly start to play audio according the command. In other words, if the
address code of combination play has been sent, even the timer expires, it will not directly empty out all,
but start to play the received data.
3. During combination playing, sending other command will interrupt the play.
3.4.3.15. Inter-cut play command (B1)
Start code
Length
Command
Mark
word
High order of
track
Low order
of track
Check
code
End
code
7E
06
B1
01
00
01
XX
EF
Note: When this command is received, the current playing audio will pause and the specified audio will
be played. After finishing playing, it will continue to play the pause audio (error within 1s is OK)
If the inter-cut play is not finished at the first time, the command will be invalid even sending the second
command. After finishing the first inter-cut play, waiting 50ms, then it can have the next inter-cut play.
Support inter-cut play between the same devices or different devices.