FT4222H USB 2.0 to Quad-SPI/I2C Bridge IC

FT4222H USB 2.0 to Quad-SPI/I2C Bridge IC

The FT4222H is part of FTDI’s expansive USB offering. Compliant with the USB 2.0 high-speed standard, this is a feature-rich single-chip bridging solution with I2C and multi-channel SPI interface capabilities. With regard to SPI the device serves as a SPI master/slave interface controller and supports all four SPI modes (0, 1, 2, 3). It allows single, dual and quad data width transfer, so that total data rates of up to 27 Mbit/s are possible. The integrated configurable I2C master/slave interface controller conforms completely with both I2C v2.1 and v3.0 specifications. Support is given for operation in 100 kbit/s standard mode (SM), 400 kbit/s fast mode (FM), 1 Mbit/s fast mode plus (FM+) and 3.4 Mbit/s high-speed mode (HS). Configurable general purpose IOs (GPIOs) can be easily controlled by software applications via the USB bus. The USB 2.0 interface draws very little current either when it is active (75 mA typical) or while in suspend mode (375 μA typical).

As with other FTDI USB device controllers, the USB protocol is fully taken care of by the IC itself, so that such activities do not waste valuable resources on the system microcontroller, which could lead to performance compromises. The FT4222H’s integrated OTP memory allows the storage of USB vendor ID (VID), product ID (PID), device serial number and product description string information, along with various other items of vendor-specific data. The battery charger detection function furnishes USB peripherals that incorporate this IC with the ability to detect connection with a dedicated charging port (DCP) and thereby benefit from more rapid charging. FTDI proprietary, royalty-free USB drivers for the Windows operating system mean that engineers can avoid the inconvenience of having to develop their own drivers.

The FT4222H is offered in a compact, Pb-free 32-pin QFN package and an operational temperature range that spans from -40°C to +85°C makes this device suitable for use in demanding industrial environments.

Features and Benefits
  • Single-chip USB 2.0 hi-speed to SPI/I2C bridge with a variety of configurations
  • Configurable industry-standard SPI master/slave interface controller
  • SCK can support up to 30 MHz in SPI master
  • Support single-bit data transfer with full-duplex transfer in SPI slave
  • +5 V USB VBUS detection engine
  • Device supplied pre-programmed with unique USB serial number
  • Utilizing USB to add system modularity
  • USB to I2C master interface controller
  • USB to single-mode SPI master controller
  • Accessory connectivity solutions for mobiles and tablets

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