FT260Q-R datasheet(20/61 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

5.2.3 I2C Slave Address

The FT260 is configured as a USB to I²C master bridge and is able to issue any value of 7-bits slave

address. Users can issue I2C commands towards an I2C slave device to read or write data via the

applications defined in USB host side. For details, refer to the FT260 Application Notes.

When the FT260 is powered up, the I2C master controller will start to scan the external I2C device. The

scanning address range is from 50h to 57h for the types of EEPROM. For further details refer to section

9.2.

5.2.4 I2C Timing

Figure 5.2 I2C Bus Timing

Parameter

Min(ns)

Typ(ns)

Max(ns)

Description

T0@12MHz

83.333

T0 is the period when operating clock=12MHz

T0@24MHz

41.666

T0 is the period when operating clock=24MHz

T0@48MHz

20.833

T0 is the period when operating clock=48MHz

T1@SM/HM

16*T0

8*(1+N)*T0

SCK Period when I2C as master with standard speed

mode(SM) and HS speed mode

T1@FM/HM

12*T0

6*(1+N)*T0

SCK Period when I2C as master with FM, FM+ speed

mode

8*T0

4*(1+N)*T0

SCK high pulse width when I2C as master with

standard speed mode(SM) and HS speed mode

4*T0

2*(1+N)*T0

SCK high pulse width when I2C as master with FM,

FM+ speed mode

2*(1+N)*T0

SDA output setup time to SCL rising edge when I2C as

master

2*(1+N)*T0

SDA output hold time to SCL falling edge when I2C as

master

＞＝

input setup time requirement from SDA to SCL rising

edge when I2C as master

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