BU94601KV_12 Datasheet, PDF (33/70 Pages) Rohm – AAC/WMA/MP3 +SD Memory Card + iPod

BU94601KV BU94603KV BU94604BKV
Datasheet
22. MODE2
22.1 Command operation
You can operate commands via the I²C serial interface. When using the LSI in MODE2, it can be operated by
setting SEL_SLAVE to L. The length of command to be sent varies depending on which command is selected.
Table 12. shows the command specifications.
Table 13. shows enabled/disabled state of each command.
Table 12. Command Operation Description
Command
name
PLAY
PAUSE
STOP
VOL+
VOL-
REPEAT
RANDOM
Comman
d byte
length ^1st
Command
2nd 3rd
0x01 -
0x02 -
0x03 -
0x04 -
2 0x50 ^{0x05 -}
0x06 -
0x07 -
Operation description
4th-
· When receiving “PLAY” command during stop, the master starts
playing the file currently selected. The order sorted from the
root folder is initially set.
· When receiving “PLAY” command during pause, the master
restarts playing the file from that point.
- · When a state which disables MP3 decoding for more than 5
seconds during play, status “DECO_ERR” is set to H. MP3
decoding is continued.
· When receiving “PLAY” command during fast forward (or
backward) playing, the master restarts normal playing the file
from current point.
-
· When receiving “PAUSE” command during play, the master
stops playing the files temporarily.
· When receiving “STOP” command during play, pause or file
search, the master stops playing the file.
- · When receiving “STOP” command during fast forward (or
backward) playing, the master stops playing the file.
· “STOP” command can be received even during BUSY.
· When SEL_VOL is set to H, “VOL+” command is enabled.
· When receiving “VOL+” command, the master controls sound
-
volume.
· Sound volume can be controlled at 32 steps from -∞ (minimum
volume) to 0dB (maximum volume).
· When SEL_VOL is set to H, “VOL-“command is enabled.
· When receiving “VOL-“command, the master controls sound
-
volume.
· Sound volume can be controlled at 32 steps from -∞ (minimum
volume) to 0dB (maximum volume).
· This command selects the mode during repeat.
· REPEAT command toggles like: “repeat all tunes in memory” Æ
“repeat one tune” Æ “repeat within folder”.
· When STATUS RPT_OFF is set as ON by "REPRAND"
command, REPEAT command toggles like: “all play in memory”
Æ “one file play” Æ “play within folder”. In this mode, it stops
-
upon completion of playing.
· When selecting “repeat within folder”, the master repeats files
within the folder being played.
· The initial setting is “repeat all tunes in memory”.
· The last setting to “REPRAND”, “REPEAT” and “RANDOM”
commands will be enabled.
· This command is as same as the “REPEAT” command in
MODE1.
· This key plays the range of ± 128 files from the current one
being played in the order of sort at random.
· When STATUS RPT_OFF is set as ON by "REPRAND"
command, REPEAT command toggles like: “one random file
-
play” Æ “all play with random in memory”. In this mode, it stops
upon completion of playing.
· The last setting to “REPRAND”, “REPEAT” and “RANDOM”
commands will be enabled.
· This command is as same as the “RANDOM” command in
MODE1.
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
33/66
TSZ02201-0V2V0E600010-1-2
2012.07.12 Rev.001