Rainbow Electronics BTM -250 - Manual (Page 6)

Stereo Headset Application
Vi
n
1
GND
2
CE
3
BY
P
4
Vo
ut
5
X
C
62
19A
332M
R
N
U2
PI
O
4
PI
O
7
PI
O
9
PI
O
8
PI
O
1
0
ON
/OF
F
1
GN
D
C2
5
10
P
C1
6
10P
C1
7
1U
F
C1
8
1U
F
C1
9
1U
F
C2
0
1U
F
C2
4U
7
/
08
05
R3
2
22
K
R3
3
2
2
K
C2
1
1U
F
C8
4 U
7 /
0
805
GN
D
1
PI
O 0
2
AIO 0
17
AU
D
IO_
IN
_LP
3
AU
D
IO_
IN
_LN
4
AU
D
IO_
IN
_R
P
5
AU
D
IO_
IN
_R
N
6
E
A
R_
R_
N
7
E
A
R_
R_
P
8
EA
R
_
L
_ N
9
EA
R
_
L
_ P
10
+V_ PA
13
SPI_ MIS O
39
AIO 1
18
GN
D
11
I/O
16
+1V 8
14
+V_ SU P
15
PCM SYN C
20
PCM _IN
21
PCM _OU T
22
PCM _C LK
23
UART _CT S
24
UART _RT S
25
GND
12
UA
RT
_
RX
26
UA
RT
_
T X
27
PI
O 4
28
PI
O 5
29
US
B
_
D
P
32
U
SB_D
N
33
PI
O 6
30
PI
O 7
31
SP
I_
M
O
SI
34
SP
I_
C
SB
35
SPI_C LK
38
GN
D
36
RF_IO
49
GND
37
GND
48
RES ET
40 PIO 8
41 PIO 9
42
PIO 10
43 PIO 11
44 PIO 3
45 PIO 2
46 PIO 1
47
AIO 3
19
GND
50
U1
BT
M
2
4
0
3
2
1
Q3 27
12
R3
8
10
0K
R3
9
470
R
BAT
_D
E
T
L3 0R
1
1
2
2
3
3
4
4
5
5
JA
C
K
1
Mi
n
i U
S
B
C
HRG
MO
S
I
CS
B
MI
S
O
CL
K
VB
A
T
PI
O
1 1
C2
3
10
4
V
DD_
A
UDI
O
C2
4
4U
7
L4 0R
+V
_ P
A 3V
3
C1
2
15
P
C1
5
15
P
RE
S
E
T
R4
1
2
2 K
R4
2
22
K
VB
AT
C9 47
3
C1
0
47
3
R2
2
150
K
R2
3
10
0K
R2
4
1M
R2
5
2K2
C1
1
15
P
L2 15
N
F
PI
O5
PI
O7
PI
O6
PI
O4
C
HRG
PI
O
8
R
E
SET
PI
O
1
0
PI
O
9
PI
O
1
1
PI
O
3
R6 0R +V
_
P
A
3 2
1 Q2 2
712
3 2
1
Q1 2 712
C2
2
10
4
V
DD_
A
UDI
O
C1
4
10
4
C1
3
104
R3
4
10
0K
R3
5
10
0K
R3
6
10
0K
R3
7
10
0K
3V
3
1 2 3 4 5
J1
MI
C
_
P
R1 10
0K
C7 10
4
BA
T
_
D
ET
PI
O5
PI
O6
VO
1
1
VD
D
10
VO
2
9
s
hut
do
w
n
6
IN
1 -
2
IN
1
+
3
B
Y
PAS
S
4
IN
2 -
8
IN
2
+
7
VS
S
5
T
PA6
11
2A2
GN
D
2
BA
T
3
Vcc
4
PR
O
G
5
C
1
L
T
C
4
054
U4
R3 4K7
C6 NC 1 2
BT
1
BAT
T
E
R
Y
1 2 3 4 5
J2 P
H
ON
EJ
AC
K
-5
R1
0
2 20K
1
%
C4
47
3
R4
0
22
K
R4
3
22K
1
2
C2
8
22
U
/1
0V
1 2
C2
9
22
U
/1
0V
R7 220
K
C1 10
4
V
DD_
A
UDI
O
R9 15
0K
1
%
R1
4
47K
C3 10
4
R1
3
2K
2
C5 NC
ZD
1
5
V
6/
0.
5W
BAT
_D
ET
3 2 1 6 5 4
J3 CO
N6
R
44
22K
R4
5
2
2
K
VB
a
t
1
2
ST
OP1
R5 47
0R
3 2
1 4
LE
D
1
R1
2
47
K
Ti
tl
e
S
iz
e
Do
cu
me
n
t Nu
mb
e
r
Re
v
Da
te
:
S
h
e
e
t
of
BT
A230
A0
R
AY
SON
Bl
ue
to
ot
h
11
M
on
day
,
Au
gus
t 1
4,
2
006
1
2
R
ESE
T 1
R8 22
0K
R1
1
2R
2
1
AN
T
IN
1
VSS
2
CE
3
Lx
5
VO
U
T
4
U3
X
C
921
6A
33C
M
R
R4
10
0K
VBA
T
R2 1K
3V
3
VB
at
3V
3
R2
1
4
70R
L1
6.
8u
H
PI
O
3
RX
_
E
N
1
TX
_
E
N
1
FWD1
VOL
_ D
O
W
N
1
VOL_
U
P1
R4
6
1
00K
R4
7
1 00K
R4
8
10
0K
R4
9
10
0K
R5
0
1 00K
R1
6
1M