_____________________________________________________________________________________
AN
‐
160
Rev.
C
HOLT
INTEGRATED
CIRCUITS
21
nC
S
SO
SI
SO
SI
MB
1
-2
MR
MB
1
-3
TP
1
AC
LK
R2
IN
T
R1
IN
T
J5
C
O
NN R
E
CT
1
4
x
2
2
4
6
8
10
12
14
16
18
20
22
24
26
28
1
3
5
7
9
11
13
15
17
19
21
23
25
27
nC
S
R
1
6
31.
6 ohm
1/
8W
TE
MP
TY
R2
IN
T
R
1
7
31.
6 ohm
1/
8 W
VD
D
3_3
MB
2
-2
MB
2
-3
MB
1
-2
EC
LK
MB
2
-1
Ti
tl
e
Siz
e
D
o
c
u
m
ent
N
u
m
ber
R
e
v
D
a
te
:
S
heet
of
<D
o
c
>
B
H
I-
3
5
93 A
R
IN
C
D
ual R
e
c
e
iv
er/
S
ingl
e
T
ran
s
m
it
te
r D
e
m
o
Board
A
11
T
ues
day
, M
a
rc
h 27,
2
012
TP
2
VD
D
C
6
0.
47uF
low
E
S
R
MB
2
-2
EC
LK
EC
LK
MOUNT O
N
BOTTOM SIDE
MOUNT O
N
BOTTOM SIDE
SC
K
R1
F
L
A
G
J2
JP
R3
1
2
3
Rec
eive
r 1
Rec
eive
r 2
Tran
smi
tter
TP
3
GN
D
C9
.01uF
Optional Ex
t. MCU I/F
GN
D
+
C2
4.
7uF
16V
SO
R1
IN
T
TE
M
P
T
Y
J8
H
eader 1 x
6
1
2
3
4
5
6
J3
JP
R
3
1
2
J7
H
eader 1 x
6
1
2
3
4
5
6
R
6
40.
2K 1/
8W
R
7
4
0
.2
K 1/
8W
R
8
40.
2K 1/
8W
R
9
40.
2K 1/
8W
R2
F
L
A
G
Notes
:
This
board plugs on t
o
the SPI Demo
board.
Input
3.3V on VDD TP1
on Main SPI De
mo Board.
Defau
lt Jumpers:
J2 1-
2
J3 1-
2
R2
IN
T
C3
47uF
10V C
E
R
low
ES
R
backsid
e of pcb
V
DD3
_
3
TF
U
L
L
J6
C
O
NN R
E
CT
1
4
x
2
2
4
6
8
10
12
14
16
18
20
22
24
26
28
1
3
5
7
9
11
13
15
17
19
21
23
25
27
VD
D
3_3
U1
6
OSC
, 4 P
IN
, 4M
H
z
E/
D
1
GN
D
2
OU
T
3
VD
D
4
J1
0
H
E
AD
ER
10
1
2
3
4
5
6
7
8
9
10
V
DD3
_
3
C
5
2.
2uF
low
E
S
R
SC
K
MB
1
-1
C1
0
.01uF
1
6
V
U3
H
I-
359
3P
Q
T
MR
10
nC
S
12
SI
13
SC
K
14
MB
1
-1
17
MB
1
-2
18
MB
1
-3
19
MB
2
-1
20
MB
2
-2
21
MB
2
-3
22
TE
MP
TY
27
TF
U
L
L
28
R2
IN
T
23
R2
F
L
A
G
24
R1
IN
T
25
R1
F
L
A
G
26
39
GN
D
AC
LK
11
VDD
44
V-
35
V+
40
CP
+
41
CP
-
42
CN+
37
CN-
36
RI
N1
A
-4
0
2
RI
N1
A
3
RI
N1
B
4
RI
N1
B
-4
0
5
RI
N2
B
8
RI
N2
A
7
RI
N2
A
-4
0
6
RI
N2
B
-4
0
9
AM
PA
33
TX
A
O
U
T
32
AM
PB
31
TX
B
O
U
T
30
SO
15
GN
D
16
VDD
43
GN
D
38
MB
2
-1
J9
H
e
a
der
1 x
6
1
2
3
4
5
6
MB
2
-3
TF
U
L
L
MR
R1
F
L
A
G
R2
F
L
A
G
MB
1
-3
nC
S
+
C7
47uF
16V
SI
C4
47uF
10V C
E
R
low
ESR
MB
1
-1
C8
.1uF
16V
MR
SC
K
R1
IN
T
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