Atmel AT83SND2C MP3 - Manual (Page 32)

Protocol Frame Description
5-28 AT83SND2CMP3 User Guide
7525A–MP3–07/05
5.2 System Command
SYSTEM_RESET Command Reset the AT83SND2CMP3. There is no answer for this command.
After a Player warm or cold reset, Remote Controller shall wait on its RX line the
followings response SYSTEM_ACK frame. This means that the AT83SND2CMP3 is
ready to communicate.
Table 5-2 . SYSTEM_RESET Frame Format
Note: As Audio analog capacitors (Headset and Power Amplifier) need to be discharged before
Player Reset, the reset can occurs after 1 or 2s.
SYSTEM_CONFIG Command The SYSTEM_CONFIG command configure the player information like:
„ USB number of logical unit (mass storage)
„ USB VID update
„ USB PID update
Default number of USB logical unit in is 1.
Table 5-3 . SYSTEM_CONFIG Frame Format
SYSTEM_GET_STATUS
Command
The SYSTEM_GET_STATUS frame can be send at any time to ask AT83SND2CMP3
status.
Frame Start Channel
Protocol
Command Data Length Data CheckSum
7Eh
Not used,
FFh
00h 00h No Yes
Frame Start Channel
Protocol
Command Data Length Data CheckSum
7Eh
Not used,
FFh
01h 05h Yes Yes
SYSTEM_CONFIG
Parameters Description
Byte 0
USB Number of logical unit
- for Nand flash only: 01h
- for MMC/SD card only: 02h
- for Nandflash and MMC/SD card: 03h
Byte 1:2
USB Vendor ID
Atmel VID is 03EBh (default value)
Byte 1: MSB(VID)
Byte 2: LSB(VID)
Byte 2:3
USB Product ID
Atmel PID is 2010h (default value)
Byte 2: MSB(PID)
Byte 3: LSB(PID)