Data Sheet

Shenzhen Waytronic Electronics Co., Ltd. WT2003S-16S Chip
- 6 -
Note: “Length” (number of bytes) = length (1 byte) + command code (several bytes) + parameters
(several bytes) + check sum (1 byte);
Cumulative sum check means the low byte of the cumulative summation of “length + command code +
parameter”.
Communication Control Command
CMD
Corresponding Function
Parameters
A0
Specify SPI-FLASH index play.
File index
A1
Specify SPI-FLASH root directory file-name play
File name
AA
Play/Pause command
None
AB
Stop command
None
AC
Next audio command
None
AD
Previous audio command
None
AE
Volume control command
Volume levels
AF
Specify play mode
Loop mode
B1
Inter-cut play
Track information
B2
Specify EQ format
EQ format
BA
Set whether need to return code
BA XX
Communication Check Command
CMD
Corresponding Function
Parameters
C1
Query the current volume settings
C1 XX
C2
Query the current working status
C2 XX
C3
Query the total number of music files in SPI Flash
C3 XXXX
Start code
Length
Command code
Parameters
Cumulative sum
check
End code
0X7E
See below
See below
See below
See below
0XEF