Quectel EG91 Series Hardware Design page 29

PCM Interface
Pin Name Pin No.
PCM_DIN 6
PCM_
7
DOUT
PCM_SYNC 5
PCM_CLK 4
I2C Interface
Pin Name Pin No.
I2C_SCL 40
I2C_SDA 41
ADC Interface
Pin Name Pin No.
EG91_Series_Hardware_Design
I/O Description
DI PCM data input
DO PCM data output
PCM data frame
IO synchronization
signal
IO PCM clock
I/O Description
I2C serial clock.
OD Used for external
codec
I2C serial data.
OD Used for external
codec
I/O Description
LTE Standard Module Series
EG91 Series Hardware Design
V min=1.2V
IH
V max=2.0V
IH
DC Characteristics
V min=-0.3V
IL
V max=0.6V
IL
V min=1.2V
IH
V max=2.0V
IH
V max=0.45V
OL
V min=1.35V
OH
V max=0.45V
OL
V min=1.35V
OH
V min=-0.3V
IL
V max=0.6V
IL
V min=1.2V
IH
V max=2.0V
IH
V max=0.45V
OL
V min=1.35V
OH
V min=-0.3V
IL
V max=0.6V
IL
V min=1.2V
IH
V max=2.0V
IH
DC Characteristics
DC Characteristics
open.
Comment
1.8V power domain.
If unused, keep it
open.
1.8V power domain.
If unused, keep it
open.
1.8V power domain.
In master mode, it is
an output signal. In
slave mode, it is an
input signal.
If unused, keep it
open.
1.8V power domain.
In master mode, it is
an output signal. In
slave mode, it is an
input signal.
If unused, keep it
open.
Comment
An external pull-up
resistor is required.
1.8V only.
If unused, keep it
open.
An external pull-up
resistor is required.
1.8V only.
If unused, keep it
open.
Comment
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