GSM/GPRS/NB-IoT Module Series
BC68&M66 Compatible Design
BC68&M66_Compatible_Design 10 / 31
2.3. Pin Assignment
The following figure shows the pin assignment of BC68 and M66.
GND
RESERVED
RESERVED
SIM_RST
SIM_CLK
R
E
S
E
R
V
E
D
V
B
A
T
G
N
D
G
N
D
D
B
G
_T
X
D
R
E
S
E
R
V
E
D
G
N
D
G
N
D
RF_ANT
14
15
16
17
18
19
20
21
22
36
37
38
39
40
41
42
43
44
1
2
3
4
5
6
7
8
9
10
11
12
13
23
24
25
26
27
28
29
30
31
32
33
34
35
RESERVED
ADC*
SIM_GND
SIM_DATA
GND
GND
RESERVED
RESERVED
VDD_EXT
R
I
T
X
D
R
X
D
N
E
T
LI
G
H
T
*
R
E
S
E
T
S
IM
_V
D
D
V
B
A
T
BC68
M66
+
RESERVED
RESERVED
RESERVED
RESERVED
RESERVED
RESERVED
RESERVED
RESERVED
R
E
S
E
R
V
E
D
R
E
S
E
R
V
E
D
R
E
S
E
R
V
E
D
RESERVED
RESERVED
RESERVED
45
46
47
48
49
50
51
52
53
54
55
56
57
58
BC68/M66
Top View
AGND
SPK2P
MICP
MICN
SPK1P
SPK1N
PWRKEY
AVDD
ADC0
SIM_GND
SIM_DATA
S
IM
_V
D
D
R
E
S
E
R
V
E
D
R
I
T
X
D
R
X
D
N
E
T
LI
G
H
T
D
T
R
D
C
D
C
T
S
SIM_RST
SIM_CLK
RF_ANT
GND
GND
BT_ANT
RFTXMON
VDD_EXT
PCM_OUT
PCM_IN
PCM_SYNC
PCM_CLK
RTS
TXD_AUX
RXD_AUX
V
R
T
C
V
B
A
T
G
N
D
G
N
D
D
B
G
_T
X
D
D
B
G
_R
X
D
G
N
D
G
N
D
V
B
A
T
Figure 1: BC68&M66 Pin Assignment
1. The
black
colored pin names are defined for BC68 module.
2. The
green
colored pin names are defined for M66 module.
3. The
orange
colored pins of BC68 are additional pins compared with M66.
NOTES
