BU94601KV_12 Datasheet, PDF (61/70 Pages) Rohm – AAC/WMA/MP3 +SD Memory Card + iPod

BU94601KV BU94603KV BU94604BKV
Datasheet
23.3 Folder information/File information
For analysis performed by “GET_DIRECT” command, read 76 bytes from the status register “COMAREA
(0x20-0x6B)” using status commands “READ_FOLDER_INFO” and “READ_FILE_INFO”. Each of the status
register structures when “READ_FOLDER_INFO” and “READ_FILE_INFO” are sent is shown below.
(1) Folder information
When the folder is specified using “SET_DIRECT”, the LSI allows you to fetch the folder information in the
specified folder from the memory device at “GET_DIRECT” and read folder information using
“READ_FOLDER_INFO”.
Table 24. shows the status register structure.
Table 24. Folder Information Register Structure
Status
OFFSET
0x20-0x25
0x26-0x27
0x28-0x2B
0x2C-0x6B
Folder information
Access data [6 bytes]
Reserve [2 bytes]
Cluster number [4 bytes]
Folder name [64 bytes]
i. Access data
:
ii. Reserve
:
iii. Cluster number :
iv. Folder name :
Shows the position where the folder information is written in the memory.
All “0s” are output.
Shows the cluster number where the folder information is written in the memory.
Outputs the folder name from the leftmost position.
(2) File information
When the folder is specified using “SET_DIRECT”, the LSI allows you to fetch the file information in the
specified folder from the memory device at “GET_DIRECT” and read file information using
“READ_FILE_INFO”.
Table 25. shows the status register structure.
Table 25. File Information Register Structure
Status
OFFSET
0x20-0x25
0x26
0x27
0x28-0x2B
0x2C-0x6B
File information
Access data [6 bytes]
Judge file type[1 bytes] *
Reserve [1bytes]
Cluster number [4 bytes]
File name [64 bytes]
i.Access data
:
ii. Judge file type :
iii. Reserve
:
iv. Cluster number :
v. File name
:
Shows the position where the file information is written in the memory.
Output “0” when play MP3 file, output “1” when play WMA file, output “2” when play
AAC file.
All “0s” are output.
Shows the cluster number where the file information is written in the memory.
Outputs the file name from the leftmost position.
* “Reserve [1bytes]” when BU94601KV.
23.4 Language Code Information
This LSI outputs Language Code Information to Status register. (OFFSET=0x1C and 0x1D)
See Chapter 22.5.
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2012.07.12 Rev.001