GSM/GPRS Module Series
M85 Hardware Design
M85_Hardware_Design Confidential / Released 17 / 88
3.1. Pin of Module
3.1.1. Pin Assignment
Power
SIM1 RESERVED
PCM
Other
SD
RESERVED
NETLIGHT
LOUDSPKN
LOUDSPKP
PWRKEY
EMERG_OFF
PCM_IN
PCM_CLK
RESERVED
RESERVED
RESERVED
SIM_GND
SIM1_RST
SIM1_DATA
SIM1_CLK
SIM1_VDD
R
E
S
E
R
V
E
D
S
IM
2_
V
D
D
S
IM
2_
C
LK
S
IM
2_
D
A
T
A
S
IM
2_
R
S
T
S
IM
1_
P
R
E
S
E
N
C
E
GND
Audio
ADC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
Top view
RF
SIM2
VBAT
UART
ADC0
RESERVED
SPK2P
AGND
MIC2P
MIC2N
MIC1P
MIC1N
SPK1N
SPK1P
STATUS
P
C
M
_O
U
T
P
C
M
_S
Y
N
C
R
E
S
E
R
V
E
D
R
E
S
E
R
V
E
D
R
E
S
E
R
V
E
D
R
E
S
E
R
V
E
D
R
E
S
E
R
V
E
D
R
E
S
E
R
V
E
D
R
E
S
E
R
V
E
D
R
E
S
E
R
V
E
D
R
E
S
E
R
V
E
D
R
E
S
E
R
V
E
D
R
E
S
E
R
V
E
D
R
E
S
E
R
V
E
D
S
D
_C
M
D
S
D
_C
LK
S
D
_D
A
T
A
0
G
N
D
TXD_AUX
RXD_AUX
DBG_TXD
DBG_RXD
DCD
RI
DTR
CTS
TXD
RXD
RTS
V
R
T
C
V
D
D
_E
X
T
G
N
D
G
N
D
R
F
_A
N
T
G
N
D
G
N
D
G
N
D
V
B
A
T
V
B
A
T
V
B
A
T
V
B
A
T
75
76
77
78
79
80
81
82
RESERVED
RESERVED
RESERVED
RESERVED
GND
GND
GND
GND
RESERVED
83
Figure 2: Pin Assignment
Keep all reserved pins open.
NOTE