DS
_FT311D
USB ANDROID HOST IC Datasheet
Version 1.0
Document No.: FT_000660 Clearance No.: FTDI#
305
29
30
31
IOBUS4
IOBUS5
IOBUS6
INPUT/OUTPUT
INPUT/OUTPUT
INPUT/OUTPUT
I/O signal. Function depends on CNFG pin setting. See table 3.4
I/O signal. Function depends on CNFG pin setting. See table 3.4
I/O signal. Function depends on CNFG pin setting. See table 3.4
Table 3.3 Interface Pins
Notes:
1. When used in Input Mode, the input pins are pulled to VCCIO via internal 75kΩ (approx.) resistors.
3.2 Interface Selection
The FT311D has multiple interfaces available for connecting to external devices. The resources available
are GPIO, UART, PWM, I2C(Master), SPI(Slave) and SPI(Master). The selection of what interface the user
requires is configured using the CNFG0, CNFG1 and CNFG2 input pins as per table 3.4.
CNFG2
GND
GND
CNFG1
GND
GND
CNFG0
GND
Leave
Open
GND
Mode
GPIO
UART
GND
Leave
Open
Leave
Open
GND
PWM
GND
Leave
Open
GND
I2C (Master)
Leave
Open
Leave
Open
SPI (Slave)
GND
Leave
Open
SPI (Master)
Table 3.4 CBUS Configuration Control
Note 1: When left open the pin is a logic 1.
Note 2: Mode “110” is a factory test mode and should not be used.
Note 3: Mode “111” will default to GPIO mode.
3.2.1 Interface pinout
The actual pinout for each interface type is detailed in table 3.5
Pin No
Pin
Name
GPIO
UART
PWM
I2C
(Master)
SPI
(Slave)
SPI
(Master)
23
24
25
IOBUS0
IOBUS1
IOBUS2
GPIO0
GPIO1
GPIO2
UART_TXD
UART_RXD
UART_RTS
#
UART_CTS
#
PWM0
PWM1
PWM2
I2C_CLK
I2C_DATA
-
-
-
-
-
-
-
26
IOBUS3
GPIO3
PWM3
-
SPI_S_SS0
SPI_M_SS0
8
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FTDI [ FUTURE TECHNOLOGY DEVICES INTERNATIONAL LTD. ]
