Table 5-18. USB Default Interface 0, Alternate Setting 2, Bulk Endpoint Descriptors
Field Description
bLength Length of this Endpoint Descriptor
Offset
0
1
2
3
4
5
6
0
1
2
3
4
5
6
0
1
2
3
4
5
6
0
1
2
3
4
5
6
0
1
2
3
4
5
6
0
1
2
3
4
5
6
Value
07H
05H
82H
02H
40H
00H
00H
07H
05H
02H
02H
40H
00H
00H
07H
05H
84H
02H
40H
00H
00H
07H
05H
04H
02H
40H
00H
00H
07H
05H
86H
02H
40H
00H
00H
07H
05H
06H
02H
40H
00H
00H
bDescriptor Type
bEndpointAddress
bmAttributes
Descriptor Type = Endpoint
Endpoint Direction (1 is in) and Address = IN2
XFR Type = BULK
wMaxPacketSize (L) Maximum Packet Size = 64 Bytes
wMaxPacketSize (H) Maximum Packet Size - High
bInterval
Polling Interval in Milliseconds (1 for iso)
Length of this Endpoint Descriptor
Descriptor Type = Endpoint
bLength
bDescriptorType
bEndpointAddress
bmAttributes
Endpoint Direction (1 is in) and Address = OUT2
XFR Type = BULK
wMaxPacketSize (L) Maximum Packet Size = 64 Bytes
wMaxPacketSize (H) Maximum Packet Size - High
bInterval
Polling Interval in Milliseconds (1 for iso)
Length of this Endpoint Descriptor
Descriptor Type = Endpoint
bLength
bDescriptorType
bEndpointAddress
bmAttributes
Endpoint Direction (1 is in) and Address = IN4
XFR Type = BULK
wMaxPacketSize (L) Maximum Packet Size = 64 Bytes
wMaxPacketSize (H) Maximum Packet Size - High
bInterval
Polling Interval in Milliseconds (1 for iso)
Length of this Endpoint Descriptor
Descriptor Type = Endpoint
bLength
bDescriptorType
bEndpointAddress
bmAttributes
Endpoint Direction (1 is in) and Address = OUT4
XFR Type = ISO
wMaxPacketSize (L) Maximum Packet Size = 64 Bytes
wMaxPacketSize (H) Maximum Packet Size - High
bInterval
Polling Interval in Milliseconds (1 for iso)
Length of this Endpoint Descriptor
Descriptor Type = Endpoint
bLength
bDescriptorType
bEndpointAddress
bmAttributes
Endpoint Direction (1 is in) and Address = IN6
XFR Type = BULK
wMaxPacketSize (L) Maximum Packet Size = 64 Bytes
wMaxPacketSize (H) Maximum Packet Size - High
bInterval
Polling Interval in Milliseconds (1 for iso)
Length of this Endpoint Descriptor
Descriptor Type = Endpoint
bLength
bDescriptorType
bEndpointAddress
bmAttributes
Endpoint Direction (1 is in) and Address = OUT6
XFR Type = BULK
wMaxPacketSize (L) Maximum Packet Size = 64 Bytes
wMaxPacketSize (H) Maximum Packet Size - High
bInterval
Polling Interval in Milliseconds (1 for iso)
The bulk endpoints for alternate setting 2 are identical to alternate setting 1.
Page 5-20
Chapter 5. EZ-USB CPU
EZ-USB TRM v1.9
CYPRESS [ CYPRESS ]
