Protocol Frame Description

Table 5-7 .SYSTEM_GET_STATUS Frame Format

 

Protocol

Data

 

CheckSu

Frame Start Channel

Command

Length

Data

m

 

 

 

 

Select Memory and install file

 

 

Not used,

 

 

system on:

 

7Eh

04h

01h

• On-Board Player Memory

Yes

FFh

 

 

 

(Nand Flash)

 

 

 

 

 

 

 

 

 

 

• Card (SD/ MMC card)

 

Table 5-8 .Data Parameter for Select Memory Command.

Memory to Select

Data Parameter Value (1 byte)

 

 

Memory Card (SD / MMC)

01h

 

 

On Board Player Memory: Nand Flash

02h

 

 

Reserved

82h

 

 

Reserved

03h

 

 

SYSTEM_SET_SOUND System Set Sound Command is used to configure AT83SND2CMP3 Sound system Command after a POWERDOWN Command or a general system RESET.

Player response is PLAYER_VOLUME* frame.

 

 

Protocol

Data

 

CheckSu

Frame Start

Channel

Command

Length

Data

m

 

 

 

 

 

 

 

 

 

 

Byte 0: MP3 DIGITAL VOLUME

 

 

 

 

 

LEFT

 

 

Not used,

 

 

Byte 1: MP3 DIGITAL VOLUME

 

7Eh

05h

05h

RIGHT

Yes

FFh

 

 

 

Byte 2: MP3 BASS

 

 

 

 

 

 

 

 

 

 

Byte 3: MP3 MEDIUM

 

 

 

 

 

Byte 4: MP3 TREBBLE

 

 

 

 

 

 

 

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

5-30

AT83SND2CMP3 User Guide

7525A–MP3–07/05