Cypress EZ-USB HX2LP - Manual (Page 11)

CY7C656xx PRELIMINARY
Document #: 38-08037 Rev. *D Page 11 of 23
8.4 Endpoint Descriptor
8.5 Interface Descriptor [9,10]
8.6 Endpoint Descriptor [9,10]
8.7 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
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 0x01 [4]
0x02
[5]
0x00 bDeviceProtocol
7 0x40 0x40 bMaxPacketSize0
8 0x01 0x01 bNumConfigurations
9 0x00 0x00 bReserved
Note:
9. If CY7C65640B is configured for singled-TT only or CY7C65630 or CY7C65620 (from the external EEPROM), this descriptor is not present.
10. If connected at high-speed