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PCM_IN
24
PCM_OUT
T
25
PCM_SYN
NC
26
PCM_CLK
K
27
I2C Interfa
ace
Pin Name
Pin No
o.
I2C_SCL
41
I2C_SDA
42
RF Interfa
ace
Pin Name
Pin No
o.
ANT_DIV
35
ANT_MAIN
N
49
ANT_GNS
SS
47
GPIO Pins
s
Pin Name
Pin N
No.
EC25-A_Us
E
All manuals and user guides at all-guides.com
DI
PCM data in
nput.
DO
PCM data o
output.
PCM data fr
rame
IO
sync signal.
.
IO
PCM clock.
I/O
Description
n
I2C serial cl
lock.
OD
Used for ex
xternal
codec.
I2C serial d
ata.
OD
Used for ex
xternal
codec.
I/O
Description
n
AI
Diversity an
ntenna.
IO
Main antenn
na.
AI
GNSS ante
nna.
I/O
Description
n
ser_ManualC
Confidentia
V
min=-0.3
3V
IL
1.8V powe
V
max=0.6
V
IL
If unused,
V
min=1.2V
V
IH
open.
V
max=2.0
0V
IH
1.8V powe
V
max=0.4
45V
OL
If unused,
V
min=1.3
35V
OH
open.
V
max=0.4
45V
1.8V powe
OL
In master
V
min=1.3
35V
OH
an output s
V
min=-0.3
3V
IL
slave mod
V
max=0.6
V
input signa
IL
V
min=1.2V
V
If unused,
IH
open.
V
max=2.0
0V
IH
1.8V powe
V
max=0.4
45V
OL
In master
V
min=1.3
35V
OH
an output s
V
min=-0.3
3V
IL
slave mod
V
max=0.6
V
input signa
IL
If unused,
V
min=1.2V
V
IH
open.
V
max=2.0
0V
IH
DC Charac
cteristics
Comment
External p
resistor is
1.8V only.
keep it ope
External p
resistor is
1.8V only.
keep it ope
DC Charac
cteristics
Comment
If unused,
50ohm impe
edance.
open.
50ohm impe
edance.
If unused,
50ohm impe
edance.
open.
DC Charac
cteristics
Comment
al / Release
d
20 / 6
69
L
LTE Module
e
EC25-AU
ser Manua
al
er domain.
keep it
er domain.
keep it
er domain.
mode, it is
signal. In
e, it is an
al.
keep it
er domain.
mode, it is
signal. In
e, it is an
al.
keep it
t
ull-up
required.
If unused,
en.
ull-up
required.
If unused,
en.
t
keep it
keep it
t
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