DS_FT311D Datasheet, PDF (24/40 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
8.2 USB to UART 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
GND
3V3
100nF
+
4.7uF
10k
3V3
VCC
VCCIO
RESET#
USBDM
USBDP
VBUSCTRL#
IOBUS0
IOBUS1
IOBUS2
CNFG2
CNFG1
CNFG0
IOBUS3
FT311D
IOBUS4
IOBUS5
IOBUS6
1V8 PLL VCC IN
VREGOUT
IOBUS7
UART_TXD
UART_RXD
UART_RTS#
UART_CTS#
UART_TX_ACTIVE
100nF
GND
GND
MCU/FPGA
Figure 8.2 Application Example showing USB to UART Converter
This example shows the CNFGx pins set for mode 001 - UART.
The UART signals are at 3V3 level and may be used to drive directly into a FPGA or MCU with a 3V3
interface, or could be level shifted with an RS232, RS422 or RS485 transceiver. The UART_TX_ACTIVE
signal is used mostly with RS485 transceivers to enable the transmit drivers.
The unused pins may be left unterminated.
Power to the USB port is enabled by the VBUSCTRL# signal
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