PL2303 datasheet(16/30 Pages) PROLIFIC

16 / 30 page

Revised Date:

March 20, 2013

ds_pl2303HXD_v1.4.4

PL-2303HX (Rev D) Product Datasheet

- 16 -

Document Version 1.4.4

Serial No. (8 hex characters)

Disabled

This field sets the product USB serial number.

Entering a unique serial number allows the

device to be assigned the same COM Port

number even when plug to other USB ports of

the same PC.

Product String Descriptor

None

This field when entered will be the string

displayed by Windows and other OS when

device is first detected and before driver is

loaded or driver not installed.

Enable for RS422/RS485

Disabled

Enable this for RS422 or RS485 support.

Remains

PL2303HXD has an integrated OTPROM

which allows to write EEPROM settings

without the use of an external one. However,

the OTPROM can only be written twice and

cannot be erased. PL2303HXD does not

support external EEPROM.

Functions

Default Value

Description

Serial Port Output

Disable

This option allows setting the serial port output

pin signals (TXD, RTS, DTR) to HIGH during

suspend mode.

USB Load Mode

Light Load (100mA)

This option sets the USB device maximum

power if 100mA (low-power) or 500mA (high

power).

Flow Control Setting

No Flow Control

This option allows to set the flow control initial

setting to none, H/W, or S/W control.

Note: H/W and S/W flow control can also be

set and configured on customer/user serial

communication software.

Wakeup Trigger Pin

Wakeup trigger on

This option allows setting the trigger pin for

remote wakeup function. When in suspend

mode, changes on the enabled serial port

input signals could trigger a wakeup event.

NOTE: To support Selective Suspend function, you

need to write and enable this option in OTPROM.

Shutdown Pin Mode

Output LOW during

suspend

This option allows setting the Shutdown pin

mode to Output HIGH or LOW on normal

mode or Suspend mode.

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