AK5373 Datasheet, PDF (48/53 Pages) Asahi Kasei Microsystems – 24-bit Stereo ADC with USB Interface

[AK5373]
■ Audio Endpoint Control Request
1. Set Endpoint Control Request
Offset
0
1
2
Field
bmRequestType
bRequest
wValue
4 wIndex
6 wLength
Size Value
1 0x22
1 0x01
2 0x0100
2 0x0081
2 0x0003
Description
SET_CUR
Upper byte: SAMPLING_FREQ_CONTROL (0x01)
Lower byte: Zero
Upper byte: Zero
Lower byte: Endpoint Address (0x81)
Length of parameter block
The parameter block of mute control is the following.
Offset
Field
Size
Value
0 iSampleFreq
3 0xYYYYYY
Description
0x001F40: 8kHz
0x002B11: 11.025kHz
0x003E80: 16kHz
0x005622: 22.05kHz
0x007D00: 32kHz
0x00AC44: 44.1kHz
0x00BB80: 48kHz
2. Get Endpoint Control Request
Offset
0
1
2
Field
bmRequestType
bRequest
wValue
4 wIndex
6 wLength
Size Value
1 0xA2
1 0x81
2 0x0100
2 0x0081
2 0x0003
Description
GET_CUR
Upper byte: SAMPLING_FREQ_CONTROL (0x01)
Lower byte: Zero
Upper byte: Zero
Lower byte: Endpoint Address (0x81)
Length of parameter block
The parameter block of mute control is the following.
Offset
Field
Size
Value
0 iSampleFreq
3 0xYYYYYY
Description
0x001F40: 8kHz
0x002B11: 11.025kHz
0x003E80: 16kHz
0x005622: 22.05kHz
0x007D00: 32kHz
0x00AC44: 44.1kHz
0x00BB80: 48kHz
MS1202-E-00
- 48 -
2010/06