UM0686
Schematic diagrams
Doc ID 15451 Rev 1
43/58
Figure 25.
RS-232 connectors
AM0
3
550v1
Re
v.
1.0
U9
ST
3232
EBT
R
V+
2
C1
+
1
C1
-
3
T1
in
11
R
1ou
t
12
T2
in
10
R
2ou
t
9
V-
6
GN
D
15
R2
in
8
T2
o
u
t
7
R1
in
13
T1
o
u
t
14
C2
+
4
C2
-
5
VC
C
16
U
S
ART2
U1
0
ST
3232EBT
R
V+
2
C1
+
1
C1
-
3
T1
in
11
R
1out
12
T2
in
10
R
2out
9
V-
6
GN
D
15
R2
in
8
T2
o
u
t
7
R1
in
13
T
1
out
14
C2
+
4
C2
-
5
VC
C
16
C7
2
1
00nF
C
73
1
00nF
R9
5
0
R
R9
6
0R
R9
4
d
o
n
o
t f
it
P2
D
B
9
-m
ale c
o
nnec
to
r
5
9
4
8
3
7
2
6
1
10
C7
4
100nF
C7
1
100nF
C7
5
100
nF
U
S
ART
1
C7
7
100nF
C
79
100nF
R9
8
0R
R
9
7
do not
f
it
P3
D
B
9-m
a
le
c
onnec
to
r
5
9
4
8
3
7
2
6
1
10
C7
8
100
nF
C7
6
100
nF
C8
0
100
nF
+3
V
3
US
A
R
T
2
_
RX
U
S
A
R
T2
_
R
TS
U
S
A
R
T2
_
C
TS
R9
9
10
K
US
A
R
T
2
_
T
X
U
S
AR
T
1_T
X
+3
V
3
US
A
RT
1
_
R
X
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