Data Sheet

Shenzhen Waytronic Electronics Co., Ltd. WT2003S-16S Chip
3.3.1. Key control.....................................................................................................................................18
3.4. Serial port control.....................................................................................................................................18
3.4.1. Protocol command format...........................................................................................................18
3.4.2. Command list................................................................................................................................ 19
3.4.3. Write operation command...........................................................................................................20
3.4.3.1. Return code format of write operation command........................................................20
3.4.3.2. Specify SD card file index play (A2).............................................................................. 21
3.4.3.3. Specify SD card file name play (A3)..............................................................................21
3.4.3.4. Index play in the specified SD card folder (A4)........................................................... 21
3.4.3.5. Index play in the specified U disk root directory (A6)................................................. 21
3.4.3.6. File name play in the specified U disk (A7).................................................................. 22
3.4.3.7. File index play in the specified U disk folder (A8)....................................................... 22
3.4.3.8. Play/Pause command (AA)............................................................................................. 22
3.4.3.9. Stop command (AB)......................................................................................................... 22
3.4.3.10. Next command (AC).......................................................................................................22
3.4.3.11. Previous command (AD)............................................................................................... 23
3.4.3.12. Volume control command (AE).................................................................................... 23
3.4.3.13. Specified play mode (AF)..............................................................................................23
3.4.3.14. Combination Play Command (B0)............................................................................... 23
3.4.3.15. Inter-cut play command (B1)........................................................................................ 24
3.4.3.16. Switch the current work drive letter (D2).................................................................... 25
3.4.4. Reading operation command..................................................................................................... 25
3.4.4.1. Query the current volume setting (C1)..........................................................................25
3.4.4.2. Read the current operation state (C2).......................................................................... 25
3.4.4.3. Query the total number of music files in SD card (C5)...............................................25
3.4.4.4. Query the total number of music files in the specified SD card folder (C6)............26
3.4.4.5. Query the total number of music files in U disk (C7).................................................. 26
3.4.4.6. Query the total number of music files in specified U disk folder (C8)......................26
3.4.4.7. Query the file track currently playing (C9).................................................................... 26
3.4.4.8. Query the current external connection status (CA).................................................... 27
3.4.4.9. Query the song name of the current play (CB)............................................................27
3.4.5. Attention......................................................................................................................................... 28
3.5. Audio file sorting.......................................................................................................................................28
3.6. Reference circuit...................................................................................................................................... 29
3.6.1. Micro SD card version smallest system circuit (include amplifier).......................................29
3.6.2. USB socket connection circuit................................................................................................... 29
3.6.3. Key circuit...................................................................................................................................... 30
4. Chip package dimension................................................................................................................................ 31
5. History version.................................................................................................................................................. 31