AK5373 Datasheet, PDF (28/53 Pages) Asahi Kasei Microsystems – 24-bit Stereo ADC with USB Interface

[AK5373]
■ Descriptors Specification (for example)
□ Customizable Block
All Descriptor contents are stored in EEP-ROM and customizable with some restrictions.
a) Device Descriptor, String Descriptor
- Maximum Packet Size
- idVendor
- idProduct
- Manufacturer Name (max. 126bytes)
- Product Name (max. 126bytes)
- Serial Number (max. 126bytes)
- Language ID
b) Configuration Descriptor
- Power Consumption
c) Feature Unit Descriptor: <Active> or < Bypass>
- If Feature Unit is not defined in the descriptor, the volume is fixed to the initial value which is described in
the EEP-ROM header block
d) PCM format (Note that the AK5373 supports 7 sample rates even when only 1 sample rate is specified in the
descriptor.)
e) Endpoint Number
f) Maximum Value of Digital Gain
g) Minimum Value of Digital Gain
h) Initial Value of Digital Gain
□ Uncustomizable Block
a) Configuration Number (1)
b) Interface Number (1)
c) Input Terminal ID (1)
d) Output Terminal ID (2)
e) Feature Unit ID (3)
f) Synchronization way (support Synchronous Type)
g) Maximum Alternate Setting number (7)
h) Endpoint Number (1-7)
1. Device descriptor
Offset
0
1
2
Field
bLength
bDescriptorType
bcdUSB
4 bDeviceClass
5 bDeviceSubClass
6 bDeviceProtocol
7 bMaxPacketSize0
8 idVendor
10 idProduct
12 bcdDevice
14 iManufacturer
15 iProduct
16 iSerialNumber
17 bNumConfigurations
Size Value
1 0x12
1 0x01
2 0x0200
1 0x00
1 0x00
1 0x00
1 0x08
2 0x0556
2 0x0006
2 0x0100
1 0x01
1 0x02
1 0x03
1 0x01
Description
Size of this descriptor in bytes
DEVICE descriptor
2.0 – USB Specification Release Number in Binary-Coded
Decimal.
Device defined at Interface level
Not used. Must be set to 0.
Not used. Must be set to 0.
8 bytes – Maximum packet size for endpoint zero
AKM – Vendor ID (assigned by the USB-IF)
AK5373 – Product ID (assigned by the manufacturer)
1.00 – Device release number in binary-coded decimal
Index of string descriptor describing manufacturer
Index of string descriptor describing product
Index of string descriptor describing the device’s serial
number
One configuration
MS1202-E-00
- 28 -
2010/06