FT4222HQ-C-R datasheet(37/49 Pages) FTDI

37 / 49 page

FT4222H USB2.0 TO QUADSPI/I2C BRIDGE IC

1.3

Document No.: FT_001011 Clearance No.: FTDI#405

In Figure 8.3, a control IC with an I2C slave interface but without a USB device interface can easily

connect to USB by integrating the FT4222H into the system. With FTDI’s mature and stable D2XX driver,

and easy to use support library, LibFT4222, the FT4222H can easily connect an application to USB. With a

suitable pull-high resistor value on I2C bus, the transfer speed at this I2C interface can be sped up to the

HS mode defined in I2C specification.

Figure 8.3 Application Example 3

In Figure 8.4, a control IC with an I2C master interface but without a USB upstream port (USB device

interface) can easily connect to USB by integrating the FT4222H into the system. With an I2C slave

interface defined in the FT4222H and easy to use API defined in LibFT4222, it is easy to connect an

application to USB via the FT4222H. With a suitable pull-high resistor value on I2C bus, the transfer

speed at this I2C interface can be speed up to the HS mode.

Figure 8.4 Application Example 4

FT4222HQ-C-R Arkusz danych(PDF) 37 Page - Future Technology Devices International Ltd.