The capability and intelligence to handle both the USB and SDIO protocols is all in hardware, allowing the IC to seamlessly translate data between the two formats. A unique and important user benefit of the device is its universal support for any SDIO device, allowing it to run with any manufacturer’s existing driver and application software without the need for any modification – drivers integrate into the standard operating system SD/SDIO driver stack.
The SDIO Host function conforms to the SDIO Host specification with a generic USB “wrapped” interface to extend SDIO host controller support to the USB bus. Key features of the device include low power, small package size and high data throughput.
With a USB2.0 Hi-Speed connection, transfer rates of up to 480 Mbps are possible, but the VUB300 is also backward-compatible with Full-Speed USB2.0 and USB1.1 ports.
The VUB300’s SDIO interface supports 1bit or 4bit SDIO and SD Interrupt with automatic card detection. It is also suitable for bus-powered applications, requiring < 450mW from a 3.3V supply. RoHS-compliant VUB300 is instantly live on power-up and includes an integrated USB 2.0 Hi-Speed PHY. The VUB300 is supplied as a 36-pin 6 x 6mm QFN device with industrial temperature range (-40 to +85degC).
The VUB300 will find applications in PC motherboards, Express cards, USB Dongles, embedded PCs, ultra-mobile PCs, smart phones and portable internet devices.