ST STEVAL-ISB044V1, User Manual

Page: 44 / 57

Schematic
diagram
UM2301
44/57 DocID031141 Rev 1
Figure 55: STEVAL-ISB044V1 circuit schematic (8 of 8)
U
S
B
5
V
3
V
3
IO V
o
lt
a
g
e
s
e
lec
tion
(3
V
3
/
5
V
)
For debug
V
B
U
S
_
U
S
B
_
M
A
S
T
E
R
V
S
S
V
S
S
V
S
S
V
S
S
V
S
S
V
S
S
V
S
S
V
C
C
_
IO
V
C
C
_
IO
V
C
C
_
IO
V
S
S
V
S
S
V
S
S
V
S
S
V
S
S
V
B
U
S
_
U
S
B
_
M
A
S
T
E
R
V
B
U
S
V
B
U
S
VSS
R
8
0
7
N
P
R
8
0
2
0
R
C
8
0
2
1
0
N
F
U
8
0
1
F
T
2
3
2
R
T
X
D
1
D
T
R
#
2
R
T
S
#
3
V
C
C
IO
4
R
X
D
5
R
I#
6
G
N
D
1
7
N
C
1
8
D
S
R
#
9
D
C
D
#
1
0
C
T
S
#
1
1
C
B
U
S
4
1
2
C
B
U
S
2
1
3
C
B
U
S
3
1
4
O
S
C
O
2
8
O
S
C
I
2
7
T
E
S
T
2
6
A
G
N
D
2
5
N
C
2
2
4
C
B
U
S
0
2
3
C
B
U
S
1
2
2
G
N
D
2
2
1
V
C
C
5
I
2
0
R
E
S
E
T
#
1
9
G
N
D
1
8
3
V
3
O
U
T
1
7
U
S
B
D
M
1
6
U
S
B
D
P
1
5
C
8
0
7
1
0
0
N
F
R
8
0
3
3
3
0
R
R
8
0
5
0
R
R
8
1
0
1
0
K
C
8
0
3
1
0
0
N
F
C
8
0
1
1
0
0
N
F
R
8
0
1
N
P
J801
U
S
B
_
V
C
C
1
U
S
B
D
M
2
U
S
B
D
P
3
U
S
B
_
G
N
D
4
SH EL L1
5
SH EL L2
6
L
8
0
0
1
2
0
R
R
8
0
4
0
R
D80
0
I/
O
1
#
1
1
G
N
D
2
V
B
U
S
5
I/
O
2
#
4
4
I/
O
1
#
6
6
I/
O
2
#
3
3
C
8
0
5
4
7
P
F
R
8
0
8
0
R
J800
V
B
U
S
1
U
S
B
D
M
2
U
S
B
D
P
3
G
N
D
4
S
H
E
L
L
1
5
S
H
E
L
L
4
8
S
H
E
L
L
2
6
S
H
E
L
L
3
7
C
8
0
6
1
0
U
F
C
8
0
4
4
7
P
F
R
8
0
9
1
0
K
R
8
0
6
3
3
0
R
T
X
D
V
C
C
3
O
R
X
D
U
S
B
D
M
_
D
O
N
G
L
E
U
S
B
D
P
_
D
O
N
G
L
E
V
B
U
S
E
x
ternal
P
ow
er
S
up
pl
y
C
on
ne
ct
or
U
S
B
L
C
6
-2
S
C
6