Copyright © 2010 Future Technology Devices International Limited

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Document Reference No.: FT_000152

USB-COM422-PLUS4 Datasheet

Version 1.1

Clearance No.: 107

1.2 LED Description

The USB-COM422-PLUS4 uses 9 LEDs to indicate a valid link as well as data traffic according to the

following table:

LED

Color

Function

Description

Quantity

Yellow

Enumerated

ON when USB-COM-PLUS4 is configured and ready

1

Red

TxD Activity

Flashes when data is transmitted from the USB-COM422-

PLUS4 to the attached RS422 device

4

Green

RxD Activity

Flashes when data is transmitted from the attached RS422

device to the USB-COM422-PLUS4

4

Table 1.1 – LED Description