W99681CF Datasheet, PDF (33/78 Pages) Winbond – JPEG USB Dual Mode Camera Chip

W99681CF
Table 7.10 W99681CF Alternate Setting 1-16 Data-In Endpoint Descriptor
Offset Field
Size Value Description
0
bLength
1
bDescriptorType
2
bEndpointAddress
3
bmAttributes
1
0x07 Size of this descriptor in bytes
1
0x05 Endpoint Descriptor Type
1
0x81 Endpoint number. Direction is set to IN.
1
0x01 Isochronous transfer type
4
wMaxPacketSize
2
Note 1 Maximum packet size of this alternate setting
6
bInterval
Note 1. Refer to Table 7.11.
1
0x01 Interval in milliseconds for polling endpoint for
data transfers
Table 7.11 shows bAlternateSetting fields and wMaxPacketSize fields for these alternate settings.
Table 7.11 The Maximum Data Payload Size in Bytes for Alternate Settings
Alternate Setting 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
bAlternateSetting 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
wMaxPacketSize 1023 959 895 831 767 703 639 575 511 447 383 319 255 191 127 63
7.4.3.3 String Descriptors
The W99681CF includes strings describing the manufacturer and product as shown in Table 7.12.
Table 7.12 W99681CF Default Stream Descriptors
Offset Field
Size Value Description
0
bLength
1
0x04 Length of String descriptor in bytes
1
bDescriptorType
1
0x03 String Descriptor Type
2
bString
2
0x0409 Array of two-byte LangID codes (English
American)
4
bLength
1
0x10 Length of String descriptor in bytes
5
bDescriptorType
6
bString
1
0x03 String Descriptor Type
14 WINBOND Manufacturer
20 bLength
21 bDescriptorType
22 bString
1
0x10 Length of String descriptor in bytes
1
0x03 String Descriptor Type
14 W99681C Product
F
- 33 -
Publication Release Date: March 2000
Revision A1