pl-2303x Prolific Technology Inc., pl-2303x Datasheet - Page 18

• Manufacturer Part Number: pl-2303x
• Description: Pl-2303x Edition Chip Rev A Usb To Serial Bridge Controller
• Manufacturer: Prolific Technology Inc.

6.7.3 String Descriptor 2 – Product
6.7.4 String Descriptor 3 – Serial Number
Note:
The size of Serial Number is fixed in PL-2303X design. It must be exactly 8 UNICODE characters (or 16 bytes). Note that in
USB Specification, this serial number must be unique for each device.
7.0 USB Standard Requests
PL-2303X supports the following USB standard requests. For non-supported requests, or requests with
invalid parameters, PL-2303X will respond with STALL packet.
PL-2303XA Product Datasheet
Offset
Offset
0
1
2
0
1
2
Blength
bDescriptorType
bSTRING
bLength
bDescriptorType
bSTRING
Clear Feature
Get Configuration
Get Descriptor
Get Status
Set Address
Set Configuration
Set Feature
o
o
o
Field
Field
Device Status
Interface Status
Endpoint 0, 1, 2, and 3 Status
Table 6-7-4 String Descriptor – Serial Number
Table 6-7-3 String Descriptor – Product
Size
Byte
Byte
Size
Byte
Byte
⎯
⎯
Value
Value
2Ch
03h
12h
03h
⇒
⇒
- 18 -
Size of this descriptor (in bytes)
STRING descriptor type
“USB-Serial Controller” in UNICODE
Size of this descriptor (in bytes)
STRING descriptor type
“X
7
X
6
X
5
X
4
X
3
X
Description
Description
2
X
1
X
0
” in UNICODE
ds_pl2303XA_v15F.doc
Document Version 1.5F
Revised Date:
July 4, 2006