Document No.: FT_000061
FT2232H DUAL HIGH SPEED USB TO MULTIPURPOSE UART/FIFO IC
Datasheet Version 2.09
Clearance No.: FTDI#77
6
FT2232H Configurations
The following sections illustrate possible USB power configurations for the FT2232H.
All USB power configurations illustrated apply to both package options for the FT2232H device
6.1 USB Bus Powered Configuration
Bus Powered Application example 1: Bus powered configuration
+3.3V
+1.8V +1.8V +1.8V +3.3V +3.3V +3.3V +3.3V
+3.3V
100nF 100nF 100nF
4.7uF 4.7uF 100nF 100nF
GND
GND
GND
GND
GND
GND
GND
100nF 100nF 100nF 100nF
GND
GND
GND
GND
+1.8V
+3.3V
56 VCCIO
42 VCCIO
31 VCCIO
20 VCCIO
64 VCORE
37 VCORE
12 VCORE
LDO +3.3V
Vin
Vout
GND
+3.3V
50 VREGIN
+1.8V
3.3uF
100nF
49 VREGOUT
9 VPLL
VPHY
4
100nF
GND
GND
1
VBUS
2
D-
3
D+
4
GND
GND
GND
ADBUS0
ADBUS1
ADBUS2
ADBUS3
ADBUS4
ADBUS5
ADBUS6
ADBUS7
ACBUS0
ACBUS1
ACBUS2
ACBUS3
ACBUS4
ACBUS5
ACBUS6
ACBUS7
BDBUS0
BDBUS1
BDBUS2
BDBUS3
BDBUS4
BDBUS5
BDBUS6
BDBUS7
16
17
18
19
21
22
23
24
26
27
28
29
30
32
33
34
38
39
40
41
43
44
45
46
48
52
53
54
55
57
58
59
60
36
7
8
6
+3.3V
14
1K
12K
+3.3V
GND
DM
DP
REF
RESET#
0Ω
GND
10K
10K
10K
EECLK
EEDATA
63
62
61
2
EECS
EECLK
EEDATA
OSCI
+3.3V
1
6
3
2
5
8
CS
VCC
ORG
4
D
Q
93C46
SCL
7
DU
GND
BCBUS0
BCBUS1
BCBUS2
BCBUS3
BCBUS4
BCBUS5
BCBUS6
BCBUS7
GND
GND
GND
GND
GND
GND
GND
GND
1
2.2K
3
12MHz
3
13
27pF
GND
OSCO
TEST
AGND
10
PWREN#
SUSPEND#
51
47
35
25
15
11
5
1
27pF
GND
GND
GND
Figure 6.1 Bus Powered Configuration Example 1
device gets its power from the USB bus. In this application, the FT2232H requires that the VBUS (USB
+5V) is regulated down to +3.3V (using an LDO) to supply the VCCIO, VPLL, VPHY and VREGIN.
VREGIN is the +3.3V input to the on chip +1.8V regulator. The output of the on chip LDO regulator
(+1.8V) drives the FT2232H core supply (VCORE). This requires a minimum of a 3.3uF filter capacitor.
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48
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