Atmel AT83SND2C MP3 - Manual (Page 20)

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
S Y S T E M
_ R E S E T
S Y S T E M
_ A C K
G E T _ S T A T U S
C o n tro lle r_ R x
C o n tro lle r_ T x
A T 8 X C 5 1 S N D 2
R es et an d in it
SYSTEM
_ACK
GET_STATUS
Controller_Rx
Controller_Tx
AT8XC51SND2
Initialization
AT83SND2CMP3
Hardware Reset