UM0408
Demonstration board schematic
21/27
Appendix B
Demonstration board schematic
1
2
3
4
56
A
B
C
D
6
5
4
3
2
1
D
C
B
A
S
cal
e
S
heet
Si
ze
FC
SM
N
o
.
D
W
G
N
o
.
R
ev
1o
f
1
B
08-
A
U
G
-2006
0.
1
*
RD
I
1
2
3
4
5
6
7
8
9
10
CON1
IC
C
RE
S
E
T
VC
C
R9
10k
ICCD
A
T
A
ICCCL
K
IC
C
C
ON
MC
U
C4
100nF
1
6
2
7
3
8
4
9
5
J2
DB9
/F
3.
3V
RS
2
3
2
IN
T
E
RF
A
C
E
RD
I
TD
O
KEYPA
D
3X4
1
2
3
J1
JA
C
K
C1
100nF
VCC
4.
3V
~
20V
3.
3V
V
C
C
GND
C1
+
1
V+
2
C1
-
3
C2
+
4
C2
-
5
V-
6
T
2
OUT
7
R2
IN
8
R2
OUT
9
T2
IN
10
T1
IN
11
R1
OUT
12
R1
IN
13
T
1
OUT
14
GND
15
VCC
16
U5
ST
3232C
D
R
VS
S
1
VDD
2
RESET#
3
PB
4
8
OS
C1
20
OS
C2
19
PA
0
18
PB
5
9
RDI
/P
B
6
10
PA
4
14
P
A
5
/I
CCDA
T
A
13
P
A
6
/I
CCL
CK
12
PA
7/
TD
O
11
PA
1
17
SS#/
P
B
0
4
SC
K
/PB
1
5
MI
S
O
/P
B
2
6
MO
S
I/
P
B
3
7
PA
2
16
PA
3
15
U4
ST
7FL
IT
E
39F2M6
S#
1
Q
2
W
3
VS
S
4
VCC
8
HOL
D
7
C
6
D
5
U3
M95080-
W
M
N
P
RS
T#
1
MR
2
SA
L
#
3
VS
S
4
TP4
8
TP3
7
TP2
6
TP1
5
VOUT
12
VBA
T
11
PF0#
10
VRE
F
9
BLD#
16
PF1
15
VCCSW
#
14
VCC
13
U2
ST
M1403A
S
N
Q
6
F
5
6
8
7
9
4
#
0
1
2
3
R6
10k
PB5
PA4
PA1
PA
3
PA
0
VCC
RE
S
E
T
ICCD
A
T
A
IC
CCL
K
I
1
G
2
O
3
U1
KF
3
3
B
DT
-T
R
D1
PO
W
E
R
R1
330
VCC
R4
10k
SC
K
MO
S
I
SS
MI
S
O
R1
1
10k
VCC
SS
SC
K
MI
S
O
MOS
I
ER
R
O
R
PB
5
PA
0
PA
1
ML
OC
K
PA
3
PA
4
TD
O
R1
4
330
D3
ML
O
C
K
R1
3
330
D2
ERROR
C3
100nF
VC
C
R5
10k
VCC
1
2
JP
1
NH
1
2
JP
2
NL
1
2
JP
3
NH
1
2
JP
4
NL
R1
2
10M
R8
10M
R1
0
10M
R7
10M
Vo
u
t
D4
B
A
T
54J
FI
L
M
BT1
3V
BZ1
BU
ZZER
R2
10k
R3
10k
Vout
VCC
C2
100nF
EEPROM
POWER
S
UPPLY
TAMP
E
R
D
E
TE
C
T
IO
N
K
E
YPAD
CONTROL
L
E
R
C7
100nF
C8
100nF
C9
100nF
C1
0
100nF
V
C
C
=
3.
3V
(150~
200m
A
)
C1
1
10nF
VCC
VCC
C5
2.
2uF/
10V
C6
1uF/
10V
ICCD
A
T
A
ICCCL
K
Vo
u
t
Vo
u
t