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Communication Protocol
3-16 AT83SND2CMP3 User Guide
7525A–MP3–07/05
3.7 Player Management
3.7.1 Player Reset After a Player warm or cold reset, Remote Controller shall wait on its RX line the
SYSTEM_ACK frame. This means that the AT83SND2CMP3 is ready to communicate.
Figure 3-4 . Warm Reset
Table 3-7 . Hardware Reset
Note: After AT83SND2CMP3 power-up, Remote Controller shall wait to receive the
SYSTEM_ACK frame on its RX line.
3.7.2 Player’s Status Player status byte reflects in real time all the events that occur in the AT83SND2CMP3:
memory error, playing or not, new file name available, USB events...
Remote Controller should have a polling management with the GET_STATUS com-
mand to refresh the Player’s status.
The Player’s Status Byte contains informations like:
Playing or idle
Memory Error
USB Connection
USB File Transfer
New File Name available
CheckSum Error
SYSTEM
_RESET
SYSTEM
_ACK
GET_STATUS
Controller_Rx
Controller_Tx
AT8XC51SND2
Reset and init
SYSTEM
_ACK
GET_STATUS
Controller_Rx
Controller_Tx
AT8XC51SND2
Initialization
AT83SND2CMP3
Hardware Reset