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Protocol Frame Description
AT83SND2CMP3 User Guide 5-33
7525A–MP3–07/05
Table 5-14 . SYSTEM_VOLUME_UP command format
SYSTEM_VOLUME_DOWN Master gain volume down (one step). Player response is PLAYER_VOLUME* frame.
Table 5-15 . SYSTEM_VOLUME_DOWN command format
SYSTEM_PLAYER_MODE Set player mode for the selected memory:
Repeat / No Repeat the Play mode
Play modes:
– Play single file
– Play Dir
– Play Disk
Table 5-16 . Player Mode
Frame Start Channel
Protocol
Command Data Length Data CheckSum
7Eh
Not used,
FFh
0Bh 00h No
Yes
Frame Start Channel
Protocol
Command Data Length Data CheckSum
7Eh
Not used,
FFh
0Ch 00h No
Yes
76543210
REPEAT - - FILETYP2 FILETYP1 FILETYP0 MOD1 MOD0
Bit
Number
Bit
Mnemonic
Description
7 REPEAT Repeat Mode
Clear for no repeat mode.
Set for repeat mode.
6:5 - Reserved
4:2 FILETYP Player File type
Set to 000b to see MP3 files only, set to 100b to see all files extensions on
selected memory (file transfer mode).
1:0 MOD Play mode.
Refer to Table 5-17 . Play Mode (MOD 1:0).