9 / 21 page
CY7C65640A
Document #: 38-08019 Rev. *I
Page 9 of 21
7.4
Endpoint Descriptor
7.5
Interface Descriptor[3]
I
7.6
Endpoint Descriptor[3]
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
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