DS_FT311D Datasheet, PDF (26/40 Pages) Future Technology Devices International Ltd. – The FT311D is a Full Speed USB host specifically targeted at providing access to peripheral hardware from an Android platform with a USB device port.

DS_FT311D USB ANDROID HOST IC Datasheet
Version 1.0
Document No.: FT_000660 Clearance No.: FTDI# 305
8.4 USB to I²C (Master) Converter
5V
3V3
3V3
REGULATOR
P Channel Power
MOSFET
0.1uF
5V_SW
Switched 5V Power to
USB
0.1uF
1
2
3
4
5
SHIELD
Ferrite
Bead
5V_SW
27R
27R
47pF
47pF
100nF
GND
GND
3V3
100nF
+
4.7uF
GND
10k
3V3
3V3
VCC
VCCIO
RESET#
USBDM
USBDP
10k
VBUSCTRL#
IOBUS0
I2C_CLK
IOBUS1
I2C_DATA
IOBUS2
CNFG2
CNFG1
CNFG0
IOBUS3
FT311D
IOBUS4
IOBUS5
IOBUS6
1V8 PLL VCC IN
VREGOUT
IOBUS7
10k
I2C Peripheral
e.g. Memory,
RTC, CODECs
100nF
GND
GND
Figure 8.4 Application Example showing USB to I²C (Master) Converter
This example shows the CNFGx pins set for mode 011 – I²C (Master).
Only two signal lines are required for I²C interfacing. The clock is an output from the FT311D while the
data line is bi-directional.
Examples of I2C peripherals include EEPROMs, Real time Clocks (RTC) and audio or video codecs.
The unused pins may be left unterminated.
Power to the USB port is enabled by the VBUSCTRL# signal
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