FT260Q-R datasheet(17/61 Pages) FTDI

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FT260 HID-CLASS USB TO UART/I2C BRIDGE IC

Version 1.1

Document No.: FT_001272 Clearance No.: FTDI#484

FT260 Configuration and Bus Interfaces

5.1

Device Interface Configuration

The FT260 has 2 HID interfaces and can be selected by {DCNF1, DCNF0}. The first HID Interface is for

the bridge function from USB HID driver to I2C bus interface. And, the second HID Interface is for the

bridge function from USB HID driver to UART bus interface. The following table shows the USB interfaces

corresponding to the chip configuration mode.

DCNF1

DCNF0

HID Interfaces

Both interfaces for I2C and UART are enabled. Interfaces will be created as :

Interface-0 is set as the interface for I2C to send and receive data via I2C connection

Interface-1 is set as the interface for UART to send and receive data via UART connection

DIO3 and DIO4 are set as RXD and TXD for UART by default

Only the interface for I2C is enabled. The interface will be created as :

Interface-0 is set as the interface for I2C to send and receive data via an I2C connection

DIO3 and DIO4 are set as GPIO functions by default.

Only the interface for UART is enabled. The interface will be created as :

Interface-0 is set as the interface for UART to send and receive data via a UART connection

DIO3 and DIO4 are set as RXD and TXD for UART by default

Both Interfaces for I2C and UART are enabled. Interfaces will be created as :

Interface-0 is set as the interface for I2C to send and receive data via an I2C connection

Interface-1 is set as the interface for UART to send and receive data via a UART connection

DIO3 and DIO4 are set as RXD and TXD for UART by default

Table 5.1 FT260 USB Device Interface Configuration

Note that the default functions for the pins, GPIOC and GPIOD, will be determined by Device Interface

Configuration. When the interface for UART is enabled, the pin DIO3 is assigned as RXD for UART and

DIO4 is assigned as TXD for UART.

DIO5 and DIO6 are default designed as SCL and SDA for the I2C bus. It means that the I2C master

controller is enabled by default no matter if the interface for I2C is enabled or not. Users can set the DIO5

and DIO6 as the GPIO functions via USB commands if the interface for the I2C is disabled and

connectivity to the external I2C devices is not required.

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