Revised Date:

March 20, 2012

ds_pl2303HXD_v1.4.4

PL-2303HX (Rev D) Product Datasheet

- 15 -

Document Version 1.4.4

6.0 OTPROM Configuration

The default configuration descriptors are stored in the chip internally which will be loaded during

power-on reset or USB bus reset whenever OTPROM (One-Time Programmable ROM) is empty.

Several of the USB descriptors could be modified and stored to the PL2303HXD OTPROM during

device startup like Vendor ID (VID), Product ID (PID), Serial Number, Product String, and other

configuration descriptors. The OTPROM can be programmed twice using the Prolific PL2303 EEPROM

Writer utility software which can be requested from Prolific or authorized distributors.

Figure 6-1 PL2303 EEPROM Writer Program

Table 6-1 EEPROM Writer Configuration

Descriptors

Default Value

Description

Vendor ID (VID)

067B (hex)

USB unique Vendor ID of Company or

Manufacturer. This ID is applied and

registered from USB-IF.

Refer to this website for applying VID:

http://www.usb.org/developers/vendor/

Product ID (PID)

2303 (hex)

USB Product ID assigned by Company or

Manufacturer.

Rel. No. (BCD)

0400

This field reports the release number of USB

the device. This item is fixed and cannot be

modified.