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參數(shù)資料
| 型號(hào)： | AK5371VQ |
| 廠商： | Asahi Kasei Microsystems Co.,Ltd |
| 英文描述： | AB 5C 2#8 3#12 SKT WALL MT REC |
| 中文描述： | 2聲道的A / D轉(zhuǎn)換器的USB我/女 |
| 文件頁數(shù)： | 26/32頁 |
| 文件大?。?/td> | 256K |
| 代理商： | AK5371VQ |
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26
MS0103-E-00
MS0103-E-00
ASAHI KASEI
[AK 5371]
2001/06
5
Device specific equests
AKM USB Microphone supports ONLY SET_CUR as bRequest field in Set Request Values.
5.1
Audio Control Request
AKM USB microphone support ONLY Feature Unit Control Request, not support other requests. Addition to this,
it only supports SET_CUR value as bRequest field in Set Feature Unit Control Request Values. All Audio Control
Requests are applied to channel 0,1,2, which means master , left and right channel.
5.1.1
AKM USB Microphone supports only one form of parameter block. Mute control is applied to master channel
(channel 0)
a) Mute Control
Offset
F ield
Size
Value
Description
0
bmRequestType
1
0x21
1
bRequest
1
0x01
SET_CUR
2
wValue
2
0x0100
MUTE_CONTROL | CHANNEL_0
4
wIndex
2
0x0300
Upper Byte : bUnit ID field in Feature Unit
Descriptor.(0x03)
Lower Byte : Audio Control Interface(0x00)
6
wLength
2
0x0001
The Length of Mute Control Parameter Block
Set F eature Unit Control Request
The parameter block of mute control is the following.
Offset
F ield
0
bMute
Size
1
Value
0x01
0x00
Description
TRUE
FALSE
a)
Volume Control
Left (channel 1) volume and right (channel 2) volume are controlled independently.
Offset
F ield
Size
Value
0
bmRequestType
1
0x21
1
bRequest
1
0x01
2
wValue
2
0x0201
0x0202
4
wIndex
2
0x0300
Description
SET_CUR
VOLUME_CONTROL | CHANNEL_1
VOLUME_CONTROL | CHANNEL_2
Upper Byte : bUnit ID field in Feature Unit
Descriptor.(0x03)
Lower Byte : Audio Control Interface(0x00)
Volume Control
6
wLength
2
0x0002
The parameter block of mute control is the following.
Offset
F ield
0
wVolume
Size
2
Value
0xZZZZ
Description
The value is mapped to the volume register value.
(refer to Table 1 conversion table )
ZZZZ is assigned by the host
If the wVolume exceeds the range, the AK5371 forces the value into the range. Please see the conversion table in
the Get Feature Unit Control Request.
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| AK5373 | 制造商:AKM 制造商全稱:AKM 功能描述:24-bit Stereo ADC with USB Interface |
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| AK5374ENP-L | 制造商:Asahi Kasei Microsystems Co Ltd 功能描述: |
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