BU94605AKV Datasheet, PDF (49/84 Pages) Rohm – AAC/WMA/MP3 +SD Memory Card +CD-ROM+MP3 Record

BU94605AKV BU94607AKV BU94702AKV BU94705AKV
Datasheet
26. Command
26.1 Control Command
The LSI allows command operations from an external microcomputer via a slave I²C serial interface.
The command length to be sent varies depending on the command.
Table 31 shows the command specifications.
Table 32 shows enabled/disabled state of each command.
Table 31. Command Operations
Command name Comm Command
Explanation of operation
and
length 1st 2nd 3rd 4th
CONFIG
CHG_SYSTEM_M 4 0x60 0x00 N 0x00 ・Set up System Operation Mode.
ODE
・Please choose 3rd byte N from the following. The other setup does not
receive a command.
N= 0x00 ; CONFIG Mode
N= 0x01 ; PLAYER Mode
N= 0x02 ; FILE RW Mode
N= 0x03 ; PLAY LIST Mode
N= 0x04 ; CD-DA Mode (*1 BU94702AKV and BU94705AKV only.)
N= 0x05 ; CD-ROM Mode
STOP
ABORT
CHG_DEV
DIS_WDT
SET_WDT
SET_SORT
N= 0x07 ; IPL WRITE Mode
The initial setting is N= 0x00.
2 0x60 0x01 - - ・When receiving the STOP command, end the present processing and
shift to the initial state in each system operation mode.
・Playing of a file will be stopped when receiving the STOP command
during Playing, a stop, and file search.
・Playing of a file will be stopped when receiving the STOP command
during fast forward or fast back Playing.
・After stopping playing the file, the LSI restarts playing it from the tune
being stopped. However, if the memory is removed and new one is
inserted before restarting, the LSI returns to the top tune of the memory.
4 0x60 0x02 0x01 0x00 ・Suspends folder analysis. After suspend, the analysis state becomes
"not analyzed" and the cursor position becomes invalid. In order to reset
this status, it is necessary to transmit an ANALYZE_ROOT command,
and it is necessary to make the cursor position valid. After
ANALYZE_ROOT command, contents acquisition of a desired folder can
be performed. It is not necessary to analyze intermediate folders one by
one from a route folder.
・The LSI suspends analysis only and continues playing the file when
receiving the ABORT command.
2 0x60 0x03 - - ・This command select device between USB memory and SD memory
card.
To do this, both devices must be connected or one device is provided
against the other (USB memory against SD memory card, and vice
versa). Any other cases will be ignored.
・After the device is selected, the system operation mode remains the
previous mode (before selecting) and goes to the initial state.
・The setting values of the individual commands remain as they are.
However, those of the REPEAT and RANDOM commands return to the
initial values
2 0x60 0x04 - - ・This command disables Watchdog Timer.
・Initial setting is that Watchdog Timer function is effective.
2 0x60 0x05 - - ・This command writes “1” to STATUS WDT_RFLG when it is executed.
4 0x60 0x06 N 0x00 ・Set up file sorting operation in a memory.
・Select N at the 3^rd byte from the following. Any setting other than
N=0x00 is considered to specify N=0x01.
N=0x00: Disables sorting of files/folders.
Data is read out in the order that is written to FAT.
N=0x01: Enables sorting of files/folders.
・Initial setting is N= 0x01. A sorting function is effective.
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TSZ02201-0V2V0E600090-1-2
2012.12.10 Rev.002