DS_FT311D USB ANDROID HOST IC Datasheet
Version 1.2
Document No.: FT_000660 Clearance No.: FTDI# 305
8.5 USB to SPI (Slave) Converter
5V
3V3
3V3
REGULATOR
VCC
Ferrite
Bead
VCCIO
1
RESET#
IOBUS0
IOBUS1
IOBUS2
IOBUS3
IOBUS4
IOBUS5
IOBUS6
IOBUS7
27R
27R
2
3
USBDM
USBDP
4
3V3
5
SPI_S_SS#
SPI_S_CLK
10k
47pF
47pF
SHIELD
FT311D
SPI MASTER
e.g. MCU,
FPGA
100nF
CNFG2
CNFG1
CNFG0
GND
SPI_S_MOSI
SPI_S_MISO
GND
1V8 PLL VCC IN
GND
VREGOUT
D
N
D
N
G
A
3V3
G
100nF
+
4.7uF
100nF
GND
GND
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.
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