Future Technology Devices International Ltd USB-COM232-PLUS4 Datasheet Document Reference No.: FT 000148 Version 1.2 Issue Date: 2010-04-12 Future Technology Devices International Ltd (FTDI) Unit 1, 2 Seaward Place, Centurion Business Park, Glasgow, G41 1HH, United Kingdom Tel.: +44 (0) 141 429 2777 Fax: + 44 (0) 141 429 2758 E-Mail (Support): support1 ftdichip.com Web: Document Reference No.: FT 000148 USB-COM232-PLUS4 Datasheet Version 1.2 Clearance No.: FTDI 97 1 Introduction 1.1 Functional Description The USB-COM-Plus modules are a family of communication devices. This model, USB-COM232-PLUS4, provides a simple method of adapting four legacy RS232 serial devices to a modern USB port. This is accomplished by incorporating the industry standard FTDI FT4232H USB2.0 Hi-Speed serial bridge chip. The integrated electronics of the USB-COM232-PLUS4 utilise the FTDI FT4232H plus four RS232 level shifters and TXD/RXD LEDs to provide a visual indication of data traffic through the module. Figure 1.1 USB-COM232-PLUS4 The module uses a standard USB-MINIB device connector for connection to an upstream host or hub port. RS232-level signals, including modem handshake signals, are available on an industry-standard DE-9P connector. The maximum RS232-level data rate is 1Mbps. The USB-COM232-PLUS4 module requires USB device drivers, available free from www.ftdichip.com, which are used to make the USB-COM232-PLUS4 appear as four Virtual COM Ports (VCP). This allows existing serial communications software, such as HyperTerminal, to exchange data through the USB- COM232-PLUS4 to a legacy RS232 peripheral device. 1.2 LED Description The USB-COM232-PLUS4 uses nine LEDs to indicate a valid link as well as data traffic according to the following table: LED Function Description quantity Colour Yellow Enumerated ON when USB-COM-Plus is configured and ready 1 TxD Activity Flashes when data is transmitted from the USB-COM232-PLUS4 to Green the attached RS232 device 4 RxD Activity Flashes when data is transmitted from the attached RS232 device to Red the USB-COM232-PLUS4 4 Table 1.1 LED Description 1.3 Block Diagram Copyright 2010 Future Technology Devices International Limited 1