BU94601KV_12 Datasheet, PDF (62/70 Pages) Rohm – AAC/WMA/MP3 +SD Memory Card + iPod

BU94601KV BU94603KV BU94604BKV
Datasheet
24. Watchdog Timer
This system builds Watchdog timer(WDT) function.
After RESET, WDT function is enabled on MODE1, MODE2 and MODE3. WDT is enabled always on MODE1. On
MODE2 and MODE3, WDT function can disable by command “SET_WDT”(0x5A,0x00). After WDT function is
disabled, this function cannot enable until a reset from external pin.
When WDT function is enabled and system is hang-up, Watchdog Timer function generates RESET.
When you want to watch RESET of WDT from master micro controller, write command “SET_WDT”(0x5A,0x01). After
write command “SET_WDT”(0x5A,0x01), status “WDT_RFLG” is “1”.
“WDT_RFLG” is bit6 of STATUS5(offset;x04). This status is “0” after RESET. Therefore, when this status returned to
“0” from “1”, this system generated a reset.
25. IRPTO (Only BU94604BKV)
The device can be controlled about MODE2 and 3 about the device where two CONFIGURATION or more is
detected at USB device connection Enumeration by the following commands.
25.1 Command operation
As for the command specification that can be used, it is table VII. It shows in 6.1.
Command
name
1st
2nd
GET_
DESCRIPTOR
0x00
GET_CONFIG
0x01
SET_CONFIG
0x5C
0x01
GET_STRING
0x02
3rd
0x00
0x01
0x00
0x01
0x02
0x00
0x01
Table 26. Command operation explanation
Command
bmRe
quest
Type
bReq
uest
wValue
wIndex wLength
4th
5th
6th
7th
8th
Explanation
0x80 0x06 0x0100
0x0000
0x0008
0x00
－*1
－
－
－
Acquire the size of the device descriptor.
0x80
0x06 0x0100 0x0000
Set value
Set value
－
－
－
－
Acquire the descriptor of the number of bytes for a set
value.
0x80 0x06 0x02_
0x0000
0x0008
Set value
Set value
－
－
－
－
Acquire the size of the configuration descriptor of the
index of a set value.
0x80 0x06 0x02_
0x0000
Set value 2
Set value 1
Set value 1 Set value 2
－
－
－
Acquire the configuration descriptor of the block of set
value 2(one block 96 bytes) of the index of set value 1.
0x00 0x09 Set value 0x0000
0x0000
Set value
－
－
－
－
Set it to the configuration of a set value. *2
0x00
0x00
0x00
－
0x80 0x06 0x0300
0x0000
0x0040
－
Acquire language ID.
0x80 0x06 0x03_
Set value 0x0040
Set value 1 Set value 2 Set value 3
－
Set value 1 2_3
－
Acquire the size of the string of the index of setting 1 of
languages ID of set values 2 and 3.
0x80 0x06 0x03_
Set value Set value 2
Set value 1 Set value 2 Set value 3 Set value 4
－
Set value 1 3_4
Acquire the string of the size of index and set value 2 of
set value 1 of languages ID of set values 3 and 4.
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2012.07.12 Rev.001