DS
_FT311D
USB ANDROID HOST IC Datasheet
Version 1.0
Document No.: FT_000660 Clearance No.: FTDI#
305
8.6 USB to SPI (Master) Converter
P Channel Power
MOSFET
5V_SW
Switched 5V Power to
USB
5V
3V3
REGULATOR
3V3
0.1uF
0.1uF
Ferrite
Bead
1
2
3
VCC
5V_SW
27R
USBDM
VCCIO
RESET#
VBUSCTRL#
IOBUS0
IOBUS1
USBDP
27R
3V3
4
5
47pF
SHIELD
100nF
GND
IOBUS2
SPI_M_SS#
SPI_M_CLK
IOBUS4
SPI_M_MOSI
IOBUS5
SPI_M_MISO
SPI SLAVE
e.g. EEPROM,
RTC, CODECs
47pF
10k
FT311D
CNFG2
CNFG1
CNFG0
IOBUS3
GND
GND
1V8 PLL VCC IN
IOBUS6
IOBUS7
VREGOUT
AG
ND
GN
D
3V3
100nF
+
4.7uF
100nF
GND
GND
Figure 8.6 Application Example showing USB to SPI (Master) Converter
This example shows the CNFGx pins set for mode 101 – SPI (Master).
The FT311D SPI Master controls the slave select line and the clock to the external SPI slave.
SPI_M_MOSI is the FT311D data output line which may be Most or Least Significant Bit first.
SPI_M_MISO is the FT311D data input line which may be Most or Least Significant Bit first.
Example SPI Slave devices include memory, RTC, and codec devices.
The unused pins may be left unterminated.
Power to the USB port is enabled by the VBUSCTRL# signal
Copyright © 2012 Future Technology Devices International Limited
28
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