Specifications

V850E2/MN4 USB CDC (Communication Device Class) Driver
R01AN0010EJ0101 Rev.1.01 Page 15 of 117
Feb 01, 2012
Table 3.6 Interface Descriptor Format
Field
Size
(Bytes) Description
bLength 1 Size of the descriptor
bDescriptorType 1 Type of the descriptor
bInterfaceNumber 1 Identification number of this interface
bAlternateSetting 1 Presence or absence of alternate setting for this interface
bNumEndpoints 1 Number of endpoints used by this interface
bInterfaceClass 1 Class code
bInterfaceSubClass 1 Subclass code
bInterfaceProtocol 1 Protocol code
iInterface 1 Index of the string descriptor describing this interface
Table 3.7 Endpoint Descriptor Format
Field
Size
(Bytes) Description
bLength 1 Size of the descriptor
bDescriptorType 1 Type of the descriptor
bEndpointAddress 1
Transfer direction of this endpoint
Address of this endpoint
bmAttributes 1 Transfer type of this endpoint
wMaxPacketSize 2 Maximum packet size available for transfer at this endpoint
bInterval 1 Interval for polling this endpoint
Table 3.8 String Descriptor Format
Field
Size
(Bytes) Description
bLength 1 Size of the descriptor
bDescriptorType 1 Type of the descriptor
bString Arbitrary Arbitrary data string