Atmel AT83SND2C MP3 - Manual (Page 31)

Protocol Frame Description
AT83SND2CMP3 User Guide 5-27
7525A–MP3–07/05
STATUS byte is in byte 0 of data field of SYSTEM_ACK frame Player’s response.
In case of Status ERROR, the Remote Controller should re-send the command again
else retry its command after Time-out.
2
USB_TRANS USB Transfer
This bit is set when an USB data transfer is being processed.
This bit is cleared when there is no USB transfer.
1 Reserved Reserved.
0
FNA File name available.
This bit is set when new file name is available.
This bit is cleared when Remote Controller has read the new file
name.
This bit is set when new FAT is installed on memory after a
SYSTEM_SELECT_MEMORY command.
Bit Number Bit Mnemonic Description