ST PCC020V1, Руководство пользователя

Страница: 45 / 57

Figure 56. STEVAL-PCC020V1 circuit schematic: MCU
*V
out = 18.50V (assume no
ORing
diode)
*By default, I5V <=>
PowerDown
Close
Jumper
to allow FW upgrade
through
U
AR
T
JT
AG
Connector
in SWD configuration
Provision
for
ORing
diode
but shouldn't
be
necessary (LDO does
the job)
Provision
to
use
the interface w/o MCU
(in this case E2P is NOT accessible)
O
S
C
_
I
N
L
E
D
2
L
E
D
1
J
T
M
S
/
S
W
D
I
O
J
T
C
K
/
S
W
C
L
K
L
E
D
3
J
T
M
S
/
S
W
D
I
O
J
T
C
K
/
S
W
C
L
K
n
R
S
T
O
S
C
_
I
N
O
S
C
_
O
U
T
B OO T 0
O
S
C
_
O
U
T
n
R
S
T
I
2
C
_
S
D
A
/
U
A
R
T
_
T
X
I
2
C
_
S
D
A
/
U
A
R
T
_
T
X
I
2
C
_
S
C
L
/
U
A
R
T
_
R
X
I
2
C
_
S
C
L
/
U
A
R
T
_
R
X
V
CC
_
S
e
n
s
e
V
CC
_
S
e
n
s
e
B
OO
T
0
L E D 1
L E D 2
L E D 3
G
ND
_
S
T
M
G
ND
_
S
T
M
G
ND
_
S
T
M
G
ND
_
S
T
M
V
DD
_3
V
3
V
DD
_3
V
3
G
ND
_
S
T
M
G
ND
_
S
T
M
G
ND
_
S
T
M
G
ND
_
S
T
M
V
DD
_3
V
3
V
DD
_3
V
3
G
ND
_
S
T
M
G
ND
_
S
T
M
+5
V
+2
0
V
+5
V
G
ND
_
S
T
M
G
ND
_
S
T
M
V
DD
_3
V
3
G
ND
_
S
T
M
G
ND
_
S
T
M
G
ND
_
S
T
M
U
A
R
T
_
H
O
S
T
_
R
X
U
A
R
T
_
H
O
S
T
_
T
X
U
A
R
T
_
H
O
S
T
_
R
X
U
A
R
T
_
H
O
S
T
_
T
X
R
1
0
100
P
F
C
2
0
4
.
7
U
F
C
2
1
100
N
F
R
1
2
100
R
R
2
2
0
R
C
1
3
10
U
F
25
V
U
7
ES
D
A
L
C
L6
-
2
S
C
6
I
/
O1#
1
1
GN
D
2
VBU
S
5
I
/
O2#
4
4
I
/
O1#
6
6
I
/
O2#
3
3
D
5
BAS
1
6
R
1
3
100
R
R
7
330R
C
1
8
100
N
F
R
1
9
390
K
C
1
9
100
N
F
R
9
330R
R
8
100
K
J
2
J
U
M
PE
R
2
1 2
R
1
5
N
P
S
T
M
32
F
373
C
8
T
6
U
9
BOOT 0
4 4
NRS
T
7
P
A
0
1
0
P
A
1
1
1
P
A
1
0
3
1
P
A
1
1
3
2
P
A
1
2
3
3
P
A
1
3
3
4
PA1 4
3 7
PA1 5
3 8
P
A
2
1
2
PA 3
1 3
PA 4
1 4
PA 5
1 5
PA 6
1 6
VDD_ 2
1 7
P
A
8
2
9
P
A
9
3
0
PB 0
1 8
VSSSD / VREFSD -
2 3
PF
6
3
5
VSS_ 1
4 7
VSS
A
/
V
r
e
f-
8
PB 1
1 9
PE 8
2 1
PE 9
2 2
VREFSD
+
2
5
PB1
4
2
6
PB1
5
2
7
PD
8
2
8
PB 2
2 0
PB 3
3 9
PB 4
4 0
PB 5
4 1
PB 6
4 2
PB 7
4 3
PB 8
4 5
PB 9
4 6
PC1
3
2
PC14
-
OSC32_
I
N
3
PC15
/
OSC32_OU
T
4
PF0
-
OSC_
I
N
5
PF1
-
OSC_OU
T
6
VB
A
T
1
VDDS D
2 4
PF
7
3
6
VDD_ 1
4 8
VDD
A
/
V
r
e
f+
9
R
2
1
10
K
R
1
4
N
P
R
1
6
10
K
U
8
L
M
2931
D
R
VOU
T
1
GN D
2
GN D
3
NC
/
A
D
J
4
I
NH
I
B
I
T
5
GN D
6
GN D
7
V
I
N
8
C
2
2
4
.
7
U
F
R
2
3
0
R
R
1
7
0
R
J
4
C
O
N
-
1
x
4
1 2 3 4
C
1
5
4
.
7
U
F
D
4
R
E
D
H
S
M
H
-
C
17
0
C
1
4
100
N
F
C
1
2
18
P
F
D
2
G
R
EE
N
H
S
M
G
-
C
17
0
C
1
1
18
P
F
C
1
6
100
N
F
R
6
330R
S
W
1
B
3
S
-
1000
P
1
2 3
4
Y
1
16
M
H
Z
1
X
1
3
X
2
2
G
ND
1
4
G
ND
2
R
2
0
68
K
C
1
7
4
.
7
U
F
R
1
8
27
K
R
1
1
100
P
F
J
5
C
O
N
-
5
x
2
1
2
3
4
5
6
7
8
9
1
0
D
3
G
R
EE
N
H
S
M
G
-
C
17
0
J
3
C
O
N
-
1
x
6
90325
-
000
6
1 2 3 4 5 6
R10 and R1
1
are initially Pul
l-up to+5V
,
but NPOn the
other
hand,
they're
replaced by 100pF
decoupling
capto filter switching
transient from HVPS
UM2342
Schematic diagram
UM2342 - Rev 1
page 45/57