FT2232C Dual USB UART / FIFO I.C.
Channel B
Pin Definitions by Chip Mode **Note 2
Enhanced
Fast
Opto-
Host Bus Isolated
Emulation Serial
Generic
Pin
Name
232 UART 245 FIFO CPU FIFO Asynchronous
MPSSE
**Note 4
MCU
Pin#
Mode
Mode
Interface
Mode
and
Synchronous
Bit-Bang Modes
Mode
Mode
**Note 5
40
39
38
37
36
35
33
32
30
29
28
27
26
BDBUS0 TXD
D0
D0
D0
AD8
FSDI
BDBUS1 RXD
BDBUS2 RTS#
BDBUS3 CTS#
BDBUS4 DTR#
BDBUS5 DSR#
BDBUS6 DCD#
BDBUS7 RI#
D1
D1
D1
AD9
FSCLK
FSDO
D2
D2
D2
AD10
AD11
AD12
AD13
AD14
AD15
CS#
D3
D3
D3
FSCTS
**Note 3
D4
D4
D4
D5
D5
D5
D6
D6
D6
D7
D7
D7
BCBUS0 TXDEN
BCBUS1 SLEEP#
BCBUS2 RXLED#
BCBUS3 TXLED#
RXF#
TXE#
RD#
WR
SI/WUB
CS#
A0
WR# **Note 9
RD# **Note 9
WR# **Note 7
RD# **Note 7
SI/WUB
ALE
RD#
WR#
**Note 8
RD#
WR#
**Note 8
SI/WUB
SI/WUB
**Note 8
SI/WUB
**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.
**Note 9 : 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. Bit-Bang mode is not available on Channel B when Fast Opto-
Isolated Serial Mode is enabled.
DS2232C Version 1.2
© Future Technology Devices International Ltd. 2004
Page 13 of 54
FTDI [ FUTURE TECHNOLOGY DEVICES INTERNATIONAL LTD. ]
