1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
11
11
12
12
13
13
14
14
15
15
16
16
17
17
K
K
J
J
I
I
H
H
G
G
F
F
E
E
D
D
C
C
B
B
A
A
Product(s):
M1939
16
10
Sheet
Of
PCB#:
Rev#:
V05
Battery Powered PA Speaker
Description:
EXMmobile
*
*
*
*
www.yorkville.com
EML Rev#:
01
BluetoothBM20.SchDoc
Modified:
File:
2022-04-08
Tmp Rev:
V031
13.5X26mm SMT Module
BM20
8284
P1_5
5
P0_4
6
SPKR
7
AOHPM
8
SPKL
9
VDDA
10
MIC1_P
11
MIC1_N
12
MIC_BIAS
13
AIR
14
G
N
D
2
3
A
D
A
P
_
IN
2
0
V
D
D
_
IO
1
9
MFB
26
LED1
27
LED2
28
P2_4
29
P0_2
30
P0_3
31
B
A
T
_
IN
2
1
R
S
T
1
6
N
C
2
2
SYS_PWR
24
BK_OUT
25
P
0
_
1
1
8
V
C
C
_
R
F
1
7
P2_0
4
P3_0
3
HCI_TXD
32
HCI_RXD
33
P0_0
1
A
IL
1
5
GND
37
EAN
2
P0_5
34
P2_7
35
P2_4
36
U17
BT_Audio_
BT_Blu_LED
25V
10U
5X5.5mm
C138
1
2
3
4
5
6
W5
Program
BT_Enable_
Tag_Connect - UART PCB connections - W5
10 - 5v In - 3
9,7,3 - RX - 5
1 - BT_GND - 1
2 - P0_0 - 2
4 - P2_4 - 4
6 - TX - 6
+v_BT
BTGnd
BT_AGnd_
BT_AGnd_
UART_RX
UART_TX
+5VBT
+5VBT
G
N
D
1
RST
3
VCC
2
SOT-23
TCM809S
7985
Q17
BT_SysPwr_
W
1
0
0
100K0
0805
R215
7
5
W6_:5
7
3
W6_:3
7
4
W6_:4
7
7
W6_:7
7
1
W6_:1
7
2
W6_:2
SO8
LM358D
7662
1
3
2
+
-
U1:1
W100
10K0
0805
R87
0603
50V
470P
C41
W125
10R0
0805
R4
SO8
LM358D
7662
5
6
7
+
-
U1:2
SO8
LM358D
7662
V+
8
V-
4
U1:3
W100
10K0
0805
R100
W100
10K0
0805
R80
0603
50V
470P
C42
W100
10K0
0805
R114
W100
4K99
0805
R95
5
0
V
1
U
1206
C147
7
6
W6_:6
1
3
4
6
7
2
5
8
_W6_
BT_AUDIO_
BT_AGND_
BTGND
+5V_BT
BT_ENABLE_
BT_SYSPWR_
BT_BLU_LED
25V
10U
5X5.5mm
C126
8x8mm
6
8
0
U
6
V
3
C178
1000UH
8091
L7
W100
475R0
0805
R269
0805
50V
100N
C174
0805
50V
100N
C173
+v_BT
MC78M05B
DPAK3
8208
OUT
IN
GND
Q18
+5v_In
+5v_In
1000UH
8091
L9
1
N59
UART_TX
1
N55
UART_RX
1
N54
+5VBT
1
N63
BT_Enable_
1
N53
P2_0
1
N69
BT_Gnd
BLT_Gnd
BLT_Gnd
P2_0