FT2232L Dual USB UART / FIFO I.C.
5.2
IO Pin Definitions by Chip Mode
The FT2232L will default to dual serial mode (232 UART mode on both channel A and B, if no external EEPROM is
used, or the external EEPROM is blank. The definition of the following pins vary according to the chip’s mode :-
Channel A
Pin Definitions by Chip Mode
**Note 2
Pin#
Generic
Pin
Name
232 UART 245 FIFO
Mode
Mode
Enhanced
Asynchronous
MPSSE
and
**Note 4
Synchronous
Bit-Bang Modes
D0
D1
D2
D3
D4
D5
D6
D7
WR#
**Note 6
RD#
**Note 6
WR#
**Note 7
RD#
**Note 7
SI/WUA
TCK/SK
TDI/D0
TDO/DI
TMS/CS
GPIOL0
GPIOL1
GPIOL2
GPIOL3
GPIOH0
GPIOH1
GPIOH2
GPIOH3
**Note 8
Fast
MCU
Opto-
Host Bus Isolated
Emulation Serial
Mode
Mode
**Note 5
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
I/O0
I/O1
IORDY
OSC
**Note 8
**Note 3
24
23
22
21
20
19
17
16
15
13
12
11
10
ADBUS0
ADBUS1
ADBUS2
ADBUS3
ADBUS4
ADBUS5
ADBUS6
ADBUS7
ACBUS0
ACBUS1
ACBUS2
ACBUS3
SI/WUA
TXD
RXD
RTS#
CTS#
DTR#
DSR#
DCD#
RI#
TXDEN
SLEEP#
RXLED#
TXLED#
SI/WUA
D0
D1
D2
D3
D4
D5
D6
D7
RXF#
TXE#
RD#
WR
SI/WUA
**Note 2 :
232 UART, 245 FIFO, CPU FIFO Interface, and Fast Opto-Isolated modes are enabled in the external
EEPROM. Enhanced Asynchronous and Synchronous Bit-Bang modes, MPSSE, and MCU Host Bus Emulation
modes are enabled using the driver command set bit mode. See Section 5.2 for details.
**Note 3 :
Channel A can be configured in another IO mode if channel B is in Fast Opto-Isolated Serial Mode. If both
Channel A and Channel B are in Fast Opto-Isolated Serial Mode all of the IO will be on Channel B.
**Note 4 :
MPSSE is Channel A only.
**Note 5 :
MCU Host Bus Emulation requires both Channels.
**Note 6 :
The Bit-Bang Mode (synchronous and asynchronous) WR# and RD# strobes are on these pins when the
main Channel mode is 245 FIFO, CPU FIFO interface, or Fast Opto-Isolated Serial Modes.
**Note 7 :
The Bit-Bang Mode (synchronous and asynchronous) WR# and RD# strobes are on these pins when the
main Channel mode is 232 UART Mode.
**Note 8 :
SI/WU is not available in these modes.
DS2232L Version 1.4
© Future Technology Devices International Ltd. 2005 Page 12 of 51
FTDI [ FUTURE TECHNOLOGY DEVICES INTERNATIONAL LTD. ]
