CY7C65640A

Document Number: 38-08019 Rev. *N

Page 10 of 25

Table 7. Endpoint Descriptor

Table 8. Interface Descriptor[3]

I

Table 9. Endpoint Descriptor[3]

Table 10. Device Qualifier Descriptor

Byte

Full Speed

High Speed

Field Name

Description

0

0x07

0x07

bLength

7 Bytes

1

0x05

0x05

bDescriptorType

ENDPOINT_DESCRIPTOR

2

0x81

0x81

bEndpointAddress

IN Endpoint #1

3

0x03

0x03

bmAttributes

Interrupt

4,5

0x0001

0x0001

wMaxPacketSize

Maximum packet size

6

0xFF

0x0C

bInterval

Polling rate

Byte

Full Speed

High Speed

Field Name

Description

0

N/A

0x09

bLength

9 Bytes

1

N/A

0x04

bDescriptorType

INTERFACE_DESCRIPTOR

2

N/A

0x00

bInterfaceNumber

Interface descriptor index

3

N/A

0x01

bAlternateSetting

Alternate setting for the interface

4

N/A

0x01

bNumEndpoints

Number of endpoints defined

5

N/A

0x09

bInterfaceClass

Interface class

6

N/A

0x00

bInterfaceSubClass

Interface sub-class

7

N/A

0x02

bInterfaceProtocol

Interface protocol

8

N/A

0x00

bInterface

Interface string index

Note

3. If TetraHub is configured for single-TT only (from the external EEPROM), this descriptor is not present.

Byte

Full Speed

High Speed

Field Name

Description

0

N/A

0x07

bLength

7 Bytes

1

N/A

0x05

bDescriptorType

ENDPOINT_DESCRIPTOR

2

N/A

0x81

bEndpointAddress

IN Endpoint #1

3

N/A

0x03

bmAttributes

Interrupt

4,5

N/A

0x0001

wMaxPacketSize

Maximum packet size

6

N/A

0x0C

bInterval

Polling rate

Byte

Full Speed

High Speed

Field Name

Description

0

0x0A

0x0A

bLength

10 Bytes

1

0x06

0x06

bDescriptorType

DEVICE_QUALIFIER

2,3

0x0200

0x0200

bcdUSB

4

0x09

0x09

bDeviceClass

5

0x00

0x00

bDeviceSubClass

6

0x02

0x00

bDeviceProtocol

7

0x40

0x40

bMaxPacketSize0

8

0x01

0x01

bNumConfigurations

9

0x00

0x00

bReserved

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