Atmel AT83SND2C MP3 User Manual
Page 52
Protocol Frame Description
5-48
AT83SND2CMP3 User Guide
7525A–MP3–07/05
Table 5-57 . CUSTOM_GET_SYS_VERSION command
Player response is CUSTOM_SYS_VERSION* frame.
CUSTOM_SYSTEM_SLEEP
Command
Ask the Player to enter in power down mode (keep audio capacitors charged).
Note:
To avoid any extra-power consumption in power down mode because of keeping audio
capacitors charged, refer to SYSTEM_POWER_DOWN command.
Table 5-58 . CUSTOM_SYSTEM_SLEEP command
CUSTOM_VOLUME Set volume for DAC master playback gain (analog volume).
This command is the same as the AUDIO_SET_GAIN (DAC Master Gain 04h).
Table 5-59 . CUSTOM_VOLUME command
Note:
Refer to AUDIO_SET_GAIN command description for Gain Value.
Player response is SYSTEM_ACK or SYSTEM_NACK.
CUSTOM_GETTOTALTIME
Command
Get MP3 file total play time.
Note:
The player response is only right whend MP3 file is Constant bit rate MP3.
Table 5-60 . CUSTOM_GETTOTALTIME Command
Player response is CUSTOM_TOTALTIME* frame.
CUSTOM_PLAYER_LAST
Command
Go to the last file of current directory .
Frame Start
Channel
Protocol
Command
Data Length
Data
CheckSum
7Eh
If not used,
FFh
94h
00h
No
Yes
Frame Start
Channel
Protocol
Command
Data Length
Data
CheckSum
7Eh
If not used,
FFh
95h
00h
No
Yes
Frame Start
Channel
Protocol
Command
Data Length
Data
CheckSum
7Eh
If not used,
FFh
F0h
01h
Byte 0: Gain Value
Yes
Frame Start
Channel
Protocol
Command
Data Length
Data
CheckSum
7Eh
If not used,
FFh
F1h
00h
No
Yes