AK5371AVQP AKM Semiconductor Inc, AK5371AVQP Datasheet - Page 29

• Manufacturer Part Number: AK5371AVQP
• Description: IC ADC STER W/USB 16BIT 48LQFP
• Manufacturer: AKM Semiconductor Inc
• Type: ADCr

Specifications of AK5371AVQP

• Resolution (bits): 16 b
• Sampling Rate (per Second): 8k ~ 48k
• Data Interface: USB
• Voltage Supply Source: Analog and Digital
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 48-LFQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 974-1030

5.2 Endpoint Control Request
The AK5371A supports five sampling frequencies. The sampling rate is changed when “Set Endpoint Control
Request ” is issued. SET_CUR, GET_CUR of bRequest is only supported. GET_MIN, GET_ MAX, and GET_RES of
bRequest are not supported.
5.2.1
Offset
0
1
2
4
6
The parameter block of mute control is the following.
Offset
0
If the iSampleFreq is different from the above values, the AK5371A forces sampling frequency to the appropriate
value.
5.2.2
Offset
0
1
2
4
6
The parameter block of mute control is the following.
Offset
0
MS0546-E-01
Set Endpoint Control Request
Get Endpoint Control Request
Field
bmRequestType
bRequest
wIndex
wLength
Field
iSampleFreq
Field
bmRequestType
bRequest
wIndex
wLength
Field
iSampleFreq
wValue
wValue
Size
Size
Size
Size
3
3
1
1
2
2
2
1
1
2
2
2
Value
0xYYYYYY
Value
0xYYYYYY
Value
0x22
0x01
0x0100
0x0081
0x0003
Value
0xA2
0x81
0x0100
0x0081
0x0003
Description
SET_CUR
Upper byte: SAMPLING_FREQ_CONTROL (0x01)
Lower byte : zero
Upper Byte : zero
Lower Byte : Endpoint Address (0x81)
The Length of Sampling Frequency Parameter
Block
Description
The following five values are valid.
invalid.
0x001F40 : 8kHz
0x002B11 : 11.025kHz
0x005622 : 22.05kHz
0x00AC44 : 44.1kHz(default)
0x00BB80 : 48kHz
Description
GET_CUR
Upper byte: SAMPLING_FREQ_CONTROL (0x01)
Lower byte : zero
Upper Byte : zero
Lower Byte : Endpoint Address (0x81)
The Length of Sampling Frequency Parameter
Block
Description
The following five values are valid.
invalid.
0x001F40 : 8kHz
0x002B11 : 11.025kHz
0x005622 : 22.05kHz
0x00AC44 : 44.1kHz
0x00BB80 : 48kHz
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Others are
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2008/11