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USB-COM422 Datasheet(PDF) 3 Page - List of Unclassifed Manufacturers |
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USB-COM422 Datasheet(HTML) 3 Page - List of Unclassifed Manufacturers |
3 / 24 page Copyright © 2010 Future Technology Devices International Limited 2 Document Reference No.: FT_000135 USB-COM422-PLUS2 Datasheet Version 1.2 Clearance No.: FTDI#103 1.2 LED Description The USB-COM422-Plus2 uses five LEDs to indicate a valid link as well as data traffic according to the following table: LED Colour Function Description Yellow x 1 Power ON when USB-COM-Plus is configured and ready Red x 2 TxD Activity Flashes when data is transmitted from the USB-COM422-Plus2 to the attached RS422 device Green x 2 RxD Activity Flashes when data is transmitted from the attached RS422 device to the USB-COM422-Plus2 Table 1.1 – LED Description 1.3 Block Diagram FTDI FT2232H Hi-Speed USB Serial Bridge RS422 Level Shifter USB B Client Connector DE-9P Connector RS422 Level Shifter DE-9P Connector Channel A Channel B Figure 1.2 USB-COM422-PLUS2 Block Diagram 1.3.1 Block description USB B Client Connector This connector provides the interface for connection to a USB Host or Hub port. The maximum cable length is 5 meters, according to the USB 2.0 specification. FTDI FT2232H FT2232H Hi-Speed USB2.0 (480Mb/s) is a dual serial UART interface IC device. Operating system device drivers are required in order to work with the one to provide the Virtual COM Port serial functionality. Dual RS422 Level Shifter The RS422 level shifter converts the signals provided by the FT2232H into the voltage levels required by RS422 devices. Dual DE-9P Connector (Male) The DE-9P connector is configured in an industry standard (TIA/EIA-574) pin-out to provide connection to RS422 peripherals through standard cables. See section 3.1.2 |
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