Atmel AT83SND2C MP3 - Manual (Page 28)

Design
4-24 AT83SND2CMP3 User Guide
7525A–MP3–07/05
status report in host system:
„
USB_MANUFACTURER_NAME: unicode character string (default “ATMEL”)
„ USB_PRODUCT_NAME: unicode characters string( “MP3 STORAGE”)
„ USB_SERIAL_NUMBER: unicode characters string (“4710765066451”)
„ SBC_VENDOR_ID: 8 ASCII characters string (default “03EBh”, ATMEL VID)
„ SBC_PRODUCT_ID:16 ASCII characters string (default “2010h”, ATMEL PID)
„ SBC_REVISION_ID: 4 ASCII characters string (“1.00”)
Default number of USB logical unit s one (= number of drive seen by Windows explorer).
It is necessary to select one memory (NandFlash or MMC/SD card) before entering
mass storage mode.
To have 2 logical unit (= number of drive seen by Windows explorer), please refer to
command SYSTEM_CONFIG.
4.1.3 File system AT83SND2CMP3 supports file system FAT12/16 and FAT32.
4.1.4 AT83SND2CMP3
IRQ IO The SND2_IRQ IO P4_3 is used as an output for interrupt request from
AT83SND2CMP3 to Controller. This IO is cleared when Player status is updated by:
„
initialization finished (after Reset),
„ USB connection/detach,
„ end of MP3 file reached when playing,
„ Memory format is OK.
„ FAT install finished and OK.
This IO is set when status is read by any command by the Remote Controller
(SYSTEM_GET_STATUS command for example).
4.1.5 Audio Gain The Audio gain default value are:
„
MP3 VOLUME LEFT: MP3 digital volume left channel (default value : settings
Medium: 0Fh)
„ MP3 VOLUME RIGHT: MP3 digital volume right channel (default value : settings
medium: 0Fh)
„ MP3 BASS (default value : settings medium: 0Fh)
„ MP3 MEDIUM (default value : settings medium: 0Fh)
„ MP3 TREBBLE (default value : settings medium: 0Fh)
„ Line out (default value i: 02h, -3 dB).
„ Power Amplifier (default value : 07h, +2 dB).
„ Line in (default value : 08h, -9 dB).
„ Auxiliary in (default value: 07h, -6 dB).
„ Dac Master Gain (default value : 0Ch, -6 dB).
All these values can be updated with commands from Remote Controller.