Future Technology Launches USB Device Controller

Future Technology Devices has released a USB device controller that is suitable for connection to a variety of logic devices, micro-processor units (MPUs) and field-programmable gate arrays (FPGAs). The FT232H USB2.0 Hi-Speed device is claimed to allow engineers to easily add Hi-Speed USB connectivity into new and legacy peripheral designs with minimum design and support effort. This versatile single-channel USB-to-UART/-FIFO interface device is bundled with the company's established USB device drivers and can be configured via Eeprom to use a variety of serial or parallel interfaces.

The associated UM232H evaluation module allows engineers to quickly prototype and test the FT232H's suitability for incorporation into new system designs. This highly integrated USB device controller contains USB, serial and parallel protocol engines, eliminating any requirement for USB-specific firmware development. The device supports input/output (I/O) interface levels of 3.3V with 5V tolerant inputs. As well as supporting asynchronous serial (UART) interfacing, the FT232H also supports interface to many synchronous I/Os such as SPI, I2C, JTAG and FPGA programming interfaces, via its built-in multi-protocol synchronous serial engine (MPSSE), which is capable of communication speeds of up to 30Mbit/s.

In addition, MPSSE can be utilised by design engineers to implement their own synchronous serial bus protocols. Incorporated as an interface option into the FT232H is the new FT1248 bus - a proprietary, synchronous, half-duplex serial/parallel interface capable of communicating with external logic at data rates of up to 30Mbyte/s. The FT1248 bus is able to trade off bandwidth against the number of physical data lines (one, two, four or eight) available to connect the FT232H to external logic.

Integrated 1.8V and 3.3V low-drop-out (LDO) voltage regulators reduce external component requirements, while the 1Kbyte transmitter and receiver data buffers coupled with USB2.0 Hi-Speed technology offer improved data throughput and reduced latency response times compared with existing USB2.0-compliant full-speed products. Royalty-free drivers for Windows, Linux, MAC and WinCE operating systems are available to download from the FTDI website. Package options for the FT232H are 48-pin LQFP (FT232HL) or 48-pin QFN (FT232HQ) lead-free packages.

Both FT232H variants have an operational temperature range of -40C to +85C. FT232HL devices are priced at USD2.75 (GBP1.69) for 1,000-piece quantities, while FT232HQ devices are priced at USD2.60 for 1,000-piece quantities. The UM232H customer evaluation module enables the rapid prototyping/testing of the FT232H platform and connects to a standard, 0.6in-wide, 28-pin DIP socket. UM232H modules are priced at USD20 each for one to nine pieces.

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