Product Info

LTE Standard Module Series
EC25 Series Hardware Design
EC25_Series_Hardware_Design 31 / 134
DBG_RXD
11
DI
Receive data
V
IL
min = -0.3 V
V
IL
max = 0.6 V
V
IH
min = 1.2 V
V
IH
max = 2.0 V
1.8 V power domain.
If unused, keep it
open.
ADC Interfaces
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
ADC0
45
AI
General-purpose
analog to digital
converter
Voltage range:
0.3 V to VBAT_BB
If unused, keep it
open.
ADC1
44
AI
General-purpose
analog to digital
converter
Voltage range:
0.3 V to VBAT_BB
If unused, keep it
open.
PCM Interface
1)
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
PCM_IN
24
DI
PCM data input
V
IL
min = -0.3 V
V
IL
max = 0.6 V
V
IH
min = 1.2 V
V
IH
max = 2.0 V
1.8 V power domain.
If unused, keep it
open.
PCM_OUT
25
DO
PCM data output
V
OL
max = 0.45 V
V
OH
min = 1.35 V
1.8 V power domain.
If unused, keep it
open.
PCM_SYNC
26
IO
PCM data frame
synchronization
signal
V
OL
max = 0.45 V
V
OH
min = 1.35 V
V
IL
min = -0.3 V
V
IL
max = 0.6 V
V
IH
min = 1.2 V
V
IH
max = 2.0 V
1.8 V power domain.
In master mode, it is
an output signal.
In slave mode, it is an
input signal.
If unused, keep it
open.
PCM_CLK
27
IO
PCM clock
V
OL
max = 0.45 V
V
OH
min = 1.35 V
V
IL
min = -0.3 V
V
IL
max = 0.6 V
V
IH
min = 1.2 V
V
IH
max = 2.0 V
1.8 V power domain.
In master mode, it is
an output signal.
In slave mode, it is an
input signal.
If unused, keep it
open.
I2C Interface
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
I2C_SCL
41
OD
I2C serial clock.
Used for external
An external 1.8 V
pull-up resistor is