Document No.: FT_000061
FT2232H DUAL HIGH SPEED USB TO MULTIPURPOSE UART/FIFO IC
Datasheet Version 2.09
Clearance No.: FTDI#77
4.3 Dual Port FT232 UART Interface Mode Description
The FT2232H can be configured in similar UART modes as the FTDI FT232 devices. The following
examples illustrate how to configure the FT2232H with an RS232, RS422 or RS485 interface. The FT2232
can be configured as a mixture of these interfaces.
4.3.1 Dual Port RS232 Configuration
Figure 4.1 illustrates how the FT2232H can be configured with an RS232 UART interface. This can be
repeated for channel B to provide a dual RS232, but has been omitted for clarity.
LED1
+1.8V +1.8V +1.8V +3.3V +3.3V +3.3V +3.3V
220
TxD_LED
+3.3V
+3.3V
+3.3V
+3.3V
100nF
100nF 100nF 100nF 100nF
100nF 100nF
LED2
220
RxD_LED
4.7uF 4.7uF 100nF 100nF
GND GND GND GND
GND GND GND GND GND GND GND
+3.3V
+1.8V
LDO +3.3V
+3.3V
TTL_TxD1
ADBUS0
+3.3V
Vin
Vout
VREGIN
50
100nF
16
TTL_RxD1
GND
ADBUS1
17
TTL_RTS1
VREGOUT
49
ADBUS2
GND
18
TTL_CTS1
100nF
100nF
ADBUS3
100nF
100nF
100nF
19
TTL_DTR1
ADBUS4
3.3uF
21
28
26
TTL_DSR1
C1+
VCC
V+
ADBUS5
22
TTL_DCD1
24
1
GND
ADBUS6
C1-
23
27
TTL_RI1
GND
GND
GND
C2+
C2-
ADBUS7
24
MAX3241EUI
2
TTL_TxD1 14
TTL_RTS1 13
TxD1
VBUS
D-
ACBUS0
26
1
2
3
4
9
DM
7
ACBUS1
27
RTS1
DTR1
D+
DP
8
ACBUS2
28
CON1
RS232-A
10
RxD_LED
ACBUS3
GND
12
29
TTL_DTR1
TxD_LED
REF
ACBUS4
30
6
DCD1
DSR1
RxD1
RTS1
TxD1
CTS1
DTR1
RI1
1
6
2
7
3
8
11
1K
ACBUS5
21
20
32
+3.3V
RESET#
14
ACBUS6
33
ACBUS7
34
11
0Ω
GND
12K
BDBUS0
38
TTL_RxD1
RxD1
CTS1
DCD1
10
19
+3.3V
BDBUS1
39
4
5
6
7
8
4
BDBUS2
40
TTL_CTS1 18
TTL_DCD1 17
9
5
GND
BDBUS3
41
GND
BDBUS4
43
BDBUS5
10K
10K
10K
44
BDBUS6
45
TTL_DSR1
16
DSR1
RI1
BDBUS7
46
EECS
63
EECS
TTL_RI1 15
EECLK
BCBUS0
48
EECLK
62
EEDATA
61
BCBUS1
100nF
EEDATA
52
23
25
PWREN#
Suspend
SHDN
V-
BCBUS2
53
BCBUS3
+3.3V
22
3
GND
54
GND
GND
OSCI
2
BCBUS4
55
BCBUS5
100nF
57
CS
VCC
Q
12MHz
BCBUS6
58
BCBUS7
1
8
2.2K
ORG
D
6
3
2
59
OSCO
TEST
3
4
PWREN
GND
SCL
PWREN#
SUSPEND#
60 SUSPEND
1
3
DU
7
13
36
GND
5
27pF
27pF
GND
GND
GND
GND
Figure 4.1 RS232 Configuration
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21
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