DS_FT311D Datasheet, PDF (27/40 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
8.5 USB to SPI (Slave) 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
3V3
10k
VCC
VCCIO
RESET#
USBDM
USBDP
VBUSCTRL#
IOBUS0
IOBUS1
IOBUS2
CNFG2
CNFG1
CNFG0
IOBUS3
FT311D
IOBUS4
IOBUS5
IOBUS6
1V8 PLL VCC IN
VREGOUT
IOBUS7
100nF
GND
GND
SPI_S_SS#
SPI_S_CLK
SPI_S_MOSI
SPI_S_MISO
SPI MASTER
e.g. MCU,
FPGA
Figure 8.5 Application Example showing USB to SPI (Slave) Converter
This example shows the CNFGx pins set for mode 100 – SPI (Slave).
The external SPI Master controls the slave select line and the clock to the FT311D.
SPI_S_MOSI is the FT311D data input line which may be Most or Least Significant Bit first.
SPI_S_MISO is the FT311D data output line which may be Most or Least Significant Bit first.
Example SPI masters include MCU‟s and FPGA‟s
The unused pins may be left unterminated.
Power to the USB port is enabled by the VBUSCTRL# signal
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