Document No.: FT_000061
FT2232H DUAL HIGH SPEED USB TO MULTIPURPOSE UART/FIFO IC
Version 2.21
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.
+3.3V
+3.3V
+1.8V +1.8V +1.8V +3.3V +3.3V +3.3V +3.3V
+3.3V 220
LED1
TxD_LED
100nF 100nF 100nF 100nF 100nF 100nF 100nF
4.7uF 4.7uF 100nF 100nF
GND GND GND GND
GND GND GND GND GND GND GND
+1.8V
+3.3V
LED2
+3.3V
220
RxD_LED
LDO +3.3V
+3.3V
Vin Vout
100nF
GND
100nF
GND
GND
GND
50 VREGIN
49 VREGOUT
3.3uF
GND
VBUS 1
D-
2
D+ 3
GND 4
0Ω GND
+3.3V
+3.3V
1K
12K
7 DM
DP
8
REF
6
RESET#
14
GND
10K 10K 10K
100nF
GND
1 CS
6 ORG
3D
2 SCL
5 GND
+3.3V
VCC
8
Q
4
DU
7
EECS
EECLK
EEDATA
EECS
63
62 EECLK
EEDATA
61
2.2K
12MHz
OSCI
2
1
3
3 OSCO
TEST
13
27pF
27pF
GND
GND
GND
Figure 4.1 RS232 Configuration
ADBUS0 16
ADBUS1 17
ADBUS2 18
ADBUS3 19
ADBUS4 21
ADBUS5 22
ADBUS6
23
ADBUS7 24
TTL_TxD1
TTL_RxD1
TTL_RTS1
TTL_CTS1
TTL_DTR1
TTL_DSR1
TTL_DCD1
TTL_RI1
ACBUS0 26
ACBUS1 27
ACBUS2 28
ACBUS3 29
ACBUS4 30
ACBUS5 32
ACBUS6 33
ACBUS7 34
RxD_LED
TxD_LED
BDBUS0 38
BDBUS1 39
BDBUS2 40
BDBUS3 41
BDBUS4 43
BDBUS5 44
BDBUS6 45
BDBUS7 46
BCBUS0 48
BCBUS1 52
BCBUS2 53
BCBUS3 54
BCBUS4
55
BCBUS5 57
BCBUS6
58
BCBUS7 59
PWREN
PWREN# 60 SUSPEND
SUSPEND#
36
100nF +3.3V
GND
100nF
100nF
100nF
28
C1+
24 C1-
1 C2+
2 C2-
TTL_TxD1 14
TTL_RTS1 13
TTL_DTR1 12
21
26
VCC
V+ 27
MAX3241EUI
TxD1
9
RTS1
10
DTR1
11
20
TTL_RxD1 19
TTL_CTS1 18
TTL_DCD1 17
TTL_DSR1 16
TTL_RI1 15
PWREN#
23
25 GND
GND
RxD1
4
CTS1
5
DCD1
6
DSR1
7
RI1
8
SHDN Suspend
22
V- 3
CON1
RS232-A
DCD1 1
DSR1 6
RxD1 2
RTS1 7
11
TxD1 3
CTS1 8
10
DTR1 4
RI1 9
GND 5
100nF
GND
GND
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