FT4222H USB to Quad SPI (I2C Bridge)

Download the FT4222H USB to Quad SPI (I2C Bridge) driver here. The FT4222H, housed in a compact 32-pin QFN package, is a versatile High/Full Speed USB2.0-to-Quad SPI/I2C device controller. To enable the internal PLL functionality, an external 12MHz crystal is required. With support for multi-voltage IO (1.8/2.5 and 3.3V), it offers flexibility in various configurations.

FT4222H USB to Quad SPI (I2C Bridge)

Table of Contents

Additionally, it features 128 bytes of one-time-programmable (OTP) memory space dedicated to storing vendor-specific information. Featuring both SPI and I2C interfaces, the FT4222H provides configurable options to suit different applications. The SPI interface can be set as a master mode, allowing data width transfers of single, dual, and quad bits.

Alternatively, it can be configured as a slave mode with single bit data width transfer. Likewise, the I2C interface can be configured as either a master or slave mode. In summary, the FT4222H offers a compact solution with a range of features, including its USB2.0-to-Quad SPI/I2C device control capabilities, support for multi-voltage IO, external crystal requirement, OTP memory for vendor-specific information, and the flexibility of configurable SPI and I2C interfaces in various modes.

Hardware Features

The FT4222H is a single chip USB2.0 Hi-speed to SPI/I2C bridge, offering a wide range of configurations to suit various applications. It provides a seamless integration of the entire USB protocol on the chip, eliminating the need for USB-specific firmware programming. Likewise see the FT201X Full Speed USB to I2C Bridge Driver and the FT200XD Full Speed USB to I2C Bridge Driver.

One notable feature of the FT4222H is its on-chip OTP memory, which stores essential USB Vendor ID (VID), Product ID (PID), device serial number, product description string, and other vendor-specific data. This allows for easy customization and identification of the device.

Communication

For SPI slave applications, the FT4222H supports full-duplex transfer with single-bit data width. It also provides support for up to 4 channels of slave selection control pins in SPI master applications, allowing for versatile connectivity options.

The FT4222H also features a configurable I2C interface, conforming to the I2C v2.1 and v3.0 specifications. It supports various data transfer speeds, including standard mode (100kbit/s), fast mode (400kbit/s), fast mode plus (1Mbit/s), and high-speed mode (3.4Mbit/s), providing flexibility for different I2C applications.

With its configurable GPIOs, the FT4222H allows easy control of General Purpose Input/Output pins through software applications via the USB bus. It also includes USB Battery Charger Detection, enabling USB peripheral devices to detect higher current power sources for faster charging capabilities. Note also the FT220X USB to 4-Bit SPI (FT1248 Bridge) and the FT221X USB to 8-bit SPI (FT1248 Bridge).

Configuration

The device is supplied pre-programmed with a unique USB serial number. Likewise ensuring individual device identification. It supports various USB power configurations, including bus-powered, self-powered, and bus-powered with power switching. Additionally, it features a +5V USB VBUS detection engine and a true 3.3V CMOS drive output. In addition TTL input, which can operate down to 1.8V with external pull-ups.

Other notable features of the FT4222H include configurable I/O pin output drive strength. Likewise an integrated power-on-reset circuit, low operating and suspend currents. In addition compatible with USB2.0 standards, and compatibility with UHCI/OHCI/EHCI host controllers.

In summary, the FT4222H offers a highly versatile USB2.0 Hi-speed to SPI/I2C bridge solution with a range of configurable options. Likewise including on-chip OTP memory, SPI master/slave interface, I2C master/slave interface. In addition ther eis also GPIO control, USB Battery Charger Detection, power configurations, compatibility with various host controllers, and efficient power management.

Summary

The FT4222H is a compact single chip that serves as a USB2.0 Hi-speed to SPI/I2C bridge. It offers a variety of configurations to cater to different applications. The chip handles the entire USB protocol without requiring USB-specific firmware programming.

It features on-chip OTP memory to store crucial information like USB Vendor ID (VID), Product ID (PID), device serial number, and product description string. The SPI interface supports master mode with flexible data width transfer options of single, dual, and quad bits.

Likewise the SCK can achieve speeds of up to 30MHz in SPI master mode, facilitating fast data transfer rates. In addition the I2C interface can be configured as a master or slave, adhering to the I2C v2.1 and v3.0 specifications. The chip also includes GPIO control, USB Battery Charger Detection, configurable I/O pin output drive strength, and compatibility with UHCI/OHCI/EHCI host controllers. In addition learn the working principles of RS485 as well.

Lastly see the CP2102 USB to UART bridge controller and the usb\vid_0403&pid_6001&rev_0600 Hardware ID code.