Innovativ chip gør det let at koble Android-enheder til periferi-devices
FTDI Chip lancerer dedikeret USB-til-UART bridge chip, der er optimeret til Android baserede systemer (in english).
FTDI Chip has further expanded its hardware and firmware support for the Android operating system with the introduction of innovative new silicon. The FT312D is a full speed (12 Mbit/s), USB host bridge IC that is designed to provide fast and simple integration of a USB link into various peripheral hardware from an Android platform (smartphone or tablet computer) that has a USB device port.Complementing the well-received FT311D device that was released last year, the FT312D is specifically targeted at UART interfacing. It has the ability to bridge the USB port to a UART interface via the Android Open Accessory protocol.
Running off a 3.3V supply, the FT312D’s host bridge has been optimized for performance and targeted specifically for a UART interface. The chip’s internal buffering mechanism consists of 5512Bytes on the UART receiver side (if the UART application on the Android platform is not accepting data) and 256Bytes on the UART transmitter side. This enables smooth data streaming between the USB port and the UART port of the IC.
The FT312D host solution handles the entire USB protocol itself, without the need for any USB or Android specific firmware programming. The host IC is suitable for use on any Android platform supporting Android Open Accessory Mode (typically for support of version 3.1 onwards).
- After offering the FT311D with 6 interface options, we found that the UART interface was the most popular, so by offering the FT312D, it makes engineers task of implementing Android support that much easier, which is another example of our Design Made Easy philosophy, says Dave Sroka, FTDI Chip’s Global Product Director.
