BU94501AMUV Datasheet, PDF (58/73 Pages) Rohm – AAC/WMA/MP3 +SD Memory Card + iPod

BU9450xAxxx series
Datasheet
14. System Operation MODE
The LSI starts operation by setting up System Operation MODE after download of the program by IPL after a power
supply and reset release.
Possible operation changes with each modes of operation.
Only the one mode can set up mode of operation with a command.
The mode which is simultaneously different cannot be set up.
A microcomputer sets up the change in System Operation MODE with a command.
Please be sure to perform the changes to each mode via CONFIG mode.
The changes between PLAYER mode and FILEREAD mode cannot be performed directly.
The settlement of the following command is to do a re-setup because it is returned in the initial value when it passes
through the CONFIG mode.
REPEAT, RANDOM, SET_EQ, SET_NEXT, SET_REPRAND, SET_TAG, SET_PRM
Command CHG_SYSTEM_MODE
N=0x00 ; CONFIG MODE
It is in the state which changes after a power supply
It is the mode which performs initial setting of a system.
Please change to the mode of other operation after setting up with an initial-setting command.
In this mode, even if it detects insertion of a memory, mount of a memory is not performed.
The mount of a memory carried out behind each mode changes.
N=0x01 ; PLAYER MODE
It is the mode which performs decoding play of the file in a memory.
File browsing (structural analysis in a memory) can be performed.
N=0x02 ; FILE Read MODE
It is the mode which Reading can perform about the specific file in a memory.
A specific file can be deleted.
File browsing (structural analysis in a memory) can be performed.
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2012.12.10 Rev.003