Future Technology Devices has released two serial interface converter cables that incorporate transceivers to facilitate connecting RS422- or RS485-based peripherals to a PC’s USB port.
Using the company’s FT232RQ USB to asynchronous serial interface IC, the USB-RS485-WE converter cable includes an RS485 transceiver while the USB-RS422-WE cable uses an RS422 transceiver. The far end of the 1.8 m cables are wire ended (no connector).
With the electronics encapsulated in the USB connector, the cables provide a quick, easy and transparent method of supporting these serial interface standards. With the complete USB protocol being managed within the FT232RQ device, there is no requirement for designers or users to worry about the USB standard.
Additionally, royalty-free device drivers for the FT232RQ are available for free download. Both VCP and D2XX drivers are available for most popular operating systems such as Windows, MAC OS X and Linux.
FT232RQ also provides a user-writeable EEPROM area. This allows the cable’s USB interface to be customised using MPROG. The internal EEPROM can be programmed in-circuit over the USB interface without any additional voltage requirements.
Phone: 02 9889 2520
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