Product Info

W
A
R
W
_
N
NE
T
USIM_
P
U
U
U
U
R
U
R
R
1. Keep
a
2. GND p
a
not be
d
3. “
※
” me
a
NOTES
E
3
1
4
5
6
7
2
W
AKEUP _IN
AP
_R EAD Y
R
ESERVED
_
DI SABL E #
N
ET _MODE
T
_STATUS
VDD _EXT
GND
GND
DBG_RXD
DBG_TXD
P
RESEN C
E
U
SIM_VDD
SIM_DATA
U
SIM_CL K
U
SIM_RST
R
ESERVED
8
9
10
11
12
13
14
15
16
17
18
U
SIM_GN D
R
ESERVED
R
ESERVED
141
142
a
ll RESERV
E
a
ds 85~112
d
esigned in
a
ns these in
E
C25-A_U
s
1
9
7
2
G
N
D
G
N
D
113
RE SE RV ED RE SE RV ED
117
126
125
124
123
122
121
120
119
118
127
128
11 5
RESERVED RESERVED
11 6
139
140
138
137
136
135
134
133
132
131
130
129
114
Powe r Pin s
Fi
E
Dpins and
should be
c
schematic
a
terface fun
c
s
e
r
_Manual
C
20 21 22
2
3
1
9
7
2
71 70 69
6
8
G
N
D
RESET_N PW RKEY GND
R
E
S
E
R
V
E
D
G
N
D
USB_VBUS
USB_DM
USB_DP
R
X
D
106
107
111
112
103
104109
105110
108
GN
D
gure 2: Pi
n
unused pin
s
c
onnected t
o
a
nd PCB d
e
c
tions are o
n
C
onfidenti
a
2
3
24 25 26 27
6
8
67 66 65 64
R
E
S
E
R
V
E
D
PCM _I N
※
PCM _O UT
※
PCM _S YNC
※
PCM _C LK
※
TXD
DTR
RTS CT S
76
77
78
79
80
81
82
83
84
100
101
102
9
99
D
Pin s
n
Assignm
e
s
unconnec
t
o
ground in
t
e
cal.
n
ly supporte
a
l / Release
28 29 30 31
63 62 61 60
RESERVED RESERVED RESERVED RESERVED
DCD
RI
STA TUS
VBAT_BB
V
B
A
T
_
B
B
73
74
75
94
98
939
7
919
6
909
5
92
Signal Pins
e
nt (Top
V
i
e
t
ed.
t
he design,
a
d on Telem
a
d 15 /
6
34 35
3
6
32 33
59 58 57 56
5
5
R
ES E
R
VE D
RESERVED ANT_DIV
G
N
D
V
B
A
T
B
B
VBAT_RF VB AT_ RF
GND
R
E
S
E
R
V
E
D
89
88
86
85
87
RESERVED
RE
S
e
w)
a
nd RESE
R
a
tics versi
o
L
EC25-AU
6
9
3
6
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
5
5
G
N
D
R
E
S
E
R
V
E
D
GN
D
GN
D
ANT
_
GN
D
ANT
GN
D
AD
C
RES
I2C
_
I2C
_
RES
AD
C
GN
D
GN
D
GN
D
RES
RES
RES
S
ERVED Pin s
RES
RES
143
144
R
VED pads
7
o
n.
L
TE Modul
e
ser Manu
a
D
D
_
MAIN
D
_GN SS
D
C
1
ERVED
_
SDA
_
SCL
ERVED
C
0
D
D
D
ERVED
ERVED
ERVED
ERVED
ERVED
7
3~84shoul
d
e
a
l
d