VCC
VCC
VCC
U1
TXD
1
TXD
OSCO
28
U2
DTR
DTR#
2
DTR#
OSCI
27
1
T3O
T4O
28
RTS#
3
RTS#
TEST
26
TXDATA
2
T1O
R3I
R3O
27
26
SD
25
CTS
GND
4
VCCIO
AGND
25
RTS
3
T2O
CTS#
RXD
5
RXD
AVCC
24
GND
RXDATA
RXD
RTS#
TXD
DSR#
4
5
R2I
R2O
SLEEP#
RI#
6
RI#
CBUS0
23
EN
6
T2I
24
7
GND
CBUS1
22
R4I
7
8
9
23
T1I
R1O
R1I
RI
8
VCC3I
GND
21
R4O
T4I
T3I
10
GND
22
21
20
RI#
RI
DTR
CTS
TXDATA
RTS
RXDATA
DSR
DCD
5
9
4
8
3
7
2
6
1
DB9M
PL1
DCD#
10
DCD#
RESET#
19
DSR
DTR#
CTS#
11
CTS#
GND
18
VCC
R5O
19
DCD#
**
SHIELD
SLEEP#
12
CBUS4
VCC3O
17
13
CBUS2
USBDM
USBDP
15
16
GND
100nF
10nF
C4
11
VCC
R5I
12
13
14
18
C1+
V+
C1-
ZT213E
DCD
V-
C2-
C2+
17
16
15
14
CBUS3
C7
100nF
10nF
C10
C5
C6
GND
FT232R
100nF
10nF
100nF
10nF
100nF
10nF
GND
1
VCC
FB1
2
GND
USB
FERRITE BEAD
*
C1
10nF
C8
VCC
CN-USB
CN1
1
2
3
4
GND
C9
GND
100nF
10nF
4.7uF
*
NOTES
+
47pF
10nF
5
C2
*
47pF
10nF
C3
FT232R APPLICATION SCHEMATIC
GND
*
Optional - may be
required to reduce
EMI emissions
GND
SHIELD
**
GND
"ChiPi"
MINIMAL COMPONENT USB SERIAL ADAPTOR
**
The shield wire
of the USB cable
should be soldered
to the DB9 outer can
10
DSR#
9
DSR#
VCC
VCC5I
20