Operating at 12Mbits/s and designed to the USB 2.0 specification, the new controllers support direct memory access (DMA) operation, whilst providing system interfaces for 8-bit parallel bus and SPI (Serial Pheripheral Interface) Slave. The FT12 series is configurable as a standard device class, and as such there is no need to add USB drivers. It was designed specifically so that engineers can quickly understand the device functionality and architecture, as well as taking advantage of application software and standard class drivers currently available and installed within the market.
Composed of three members, and inspired by the industry standard D12, the FT12 series offers unique features like battery charging detection, numerous interface options and optimised device footpints - allowing the designer to choose the best-fit chip. A serial interface engine (SIE) built into each FT12 handles the USB protocol and carries out packet recognition, checking and sequencing. Multiple USG transfer modes are supported, enabling bulk and isochronous data transfer activity, as well as supporting interrupt protocol.
The FT121 and FT122 handle all clock generation internally and require no crystal, thus freeing valuable PCB area and lowering system cost. A dedicated clock output pin with no programmable clock frequency (from 4MHz to 24MHz) is also included.
Visit us at Embedded World 2014, Stand 4A-328 or visit our website, www.ftdichip.com for more information.