Datasheet

Revised Date:
April 16, 2007
ds_pl2303HXD_v1.1.doc
PL-2303HX (Rev D) Product Datasheet - 17 - Document Version 1.1
6.6 Endpoint 3 Descriptor: Bulk Data Input endpoint
Table 6-6 Endpoint3 Descriptor
Offset Field Size Value Description
0
bLength
Byte 07h Size of this descriptor (in bytes)
1
bDescriptorType
Byte 05h ENDPOINT descriptor type
2
bEndpointAddress
Byte 83h Input endpoint
3
bmAttributes
Byte 02h Transfer type is BULK
4
wMaxPacketSize
Word 0040h 64 bytes
6
bInterval
Byte 00h Ignored field
6.7 String Descriptors
PL-2303HX supports four string descriptors:
¾ Language ID
¾ Manufacturer
¾ Product
¾ Serial Number
Except for Serial Number, the other three string descriptors are stored in the internal Mask ROM, i.e.
their contents are fixed. The Serial Number is a special case. If the on-chip OTPROM is not properly
programmed, then the Serial Number would be hidden from the system. If the on-chip OTPROM is
properly programmed, then the Serial Number will be read from the on-chip OTPROM.
The following tables demonstrate the current defined value for each descriptor:
6.7.1 String Descriptor 0 – Language ID
Table 6-7a String Descriptor – Language ID
Offset Field Size Value Description
0
bLength
Byte 04h Size of this descriptor (in bytes)
1
bDescriptorType
Byte 03h STRING descriptor type
2
bLANGID[0]
Word 0409h English (United States)
6.7.2 String Descriptor 1 – Manufacturer
Table 6-7b String Descriptor – Manufacturer
Offset Field Size Value Description
0
BLength
Byte 32h Size of this descriptor (in bytes)
1
bDescriptorType
Byte 03h STRING descriptor type
2
bSTRING
⎯ ⇒
“Prolific Technology Inc.” in UNICODE