Quectel EG91 Series Hardware Design page 30

ADC Interface
Pin Name Pin No.
ADC0 24
SPI Interface
Pin Name Pin No.
SPI_CLK 26
SPI_MOSI 27
SPI_MISO 28
RF Interfaces
Pin Name Pin No.
49
(EG91-N
ANT_GNSS
A/-NS/
-V/-EC)
49
(EG91-E
)
ANT_DIV
56
(EG91-
NA/-NS/
-V/-EC)
ANT_MAIN 60
Other Pins
Pin Name Pin No.
EG91_Hardware_Design
I/O Description
General purpose
AI analog to digital
converter
I/O Description
Clock signal of SPI
DO
interface
Master output slave
DO input of SPI
interface
Master input slave
DI output of SPI
interface
I/O Description
AI GNSS antenna pad
Receive diversity
AI
antenna pad
IO Main antenna pad
I/O Description
DC Characteristics
Voltage range:
0.3V to VBAT_BB
DC Characteristics
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
DC Characteristics
DC Characteristics
29 / 93
LTE Module Series
EG91 Hardware Design
Comment
If unused, keep it
open.
Comment
1.8V power domain.
If unused, keep it
open.
1.8V power domain.
If unused, keep it
open.
1.8V power domain.
If unused, keep it
open.
Comment
50Ω impedance.
If unused, keep it
open.
The pin is defined as
ANT_DIV on
EG91-E.
50Ω impedance.
If unused, keep it
open.
The pin is reserved on
EG91-E.
50Ω impedance.
If unused, keep it
open.
Comment