DS_FT311D USB ANDROID HOST IC Datasheet
Version 1.2
Document No.: FT_000660 Clearance No.: FTDI# 305
8.6 USB to SPI (Master) 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
10k
5
SPI_M_SS#
SPI_M_CLK
47pF
47pF
SHIELD
FT311D
100nF
SPI SLAVE
e.g. EEPROM,
RTC, CODECs
CNFG2
CNFG1
CNFG0
GND
SPI_M_MOSI
SPI_M_MISO
GND
1V8 PLL VCC IN
GND
VREGOUT
D
N
D
N
G
A
3V3
G
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.
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