Atmel AT83SND2C MP3 - Manual (Page 34)

Protocol Frame Description
5-30 AT83SND2CMP3 User Guide
7525A–MP3–07/05
Table 5-7 . SYSTEM_GET_STATUS Frame Format
Table 5-8 . Data Parameter for Select Memory Command.
SYSTEM_SET_SOUND
Command
System Set Sound Command is used to configure AT83SND2CMP3 Sound system
after a POWERDOWN Command or a general system RESET.
Player response is PLAYER_VOLUME* frame.
Data are 5 bytes of Volume settings
– MP3 VOLUME LEFT: MP3 digital volume left channel
– MP3 VOLUME RIGHT: MP3 digital volume right channel
– MP3 BASS
– MP3 MEDIUM
– MP3 TREBBLE
Each of these 5 bytes must be in the following:
•
Settings Minimum: 00h
• Settings Medium: 0Fh
• Settings Maximum: 1Fh
Frame Start Channel
Protocol
Command
Data
Length Data
CheckSu
m
7Eh
Not used,
FFh
04h 01h
Select Memory and install file
system on:
•
On-Board Player Memory
(Nand Flash)
• Card (SD/ MMC card)
Yes
Memory to Select Data Parameter Value (1 byte)
Memory Card (SD / MMC) 01h
On Board Player Memory: Nand Flash 02h
Reserved 82h
Reserved 03h
Frame Start Channel
Protocol
Command
Data
Length Data
CheckSu
m
7Eh
Not used,
FFh
05h 05h
Byte 0: MP3 DIGITAL VOLUME
LEFT
Byte 1: MP3 DIGITAL VOLUME
RIGHT
Byte 2: MP3 BASS
Byte 3: MP3 MEDIUM
Byte 4: MP3 TREBBLE
Yes