Quectel EG91 Series Hardware Design page 25

VBAT_RF 52, 53
VDD_EXT 29
3, 31, 48,
50, 54, 55,
58, 59, 61,
GND 62, 67~74,
79~82,
89~91,
100~106
Turn-on/off
Pin Name Pin No.
PWRKEY 15
RESET_N 17
Status Indication
Pin Name Pin No.
STATUS 20
NETLIGHT 21
USB Interface
Pin Name Pin No.
USB_VBUS 8
EG91_Hardware_Design
Power supply for
PI
module's RF part
Provide 1.8V for
PO
external circuit
Ground
I/O Description
Turn on/off the
DI
module
Reset signal of the
DI
module
I/O Description
Indicate the
DO module's operating
status
Indicate the
DO module's network
activity status
I/O Description
USB connection
PI
detection
24 / 93
EG91 Hardware Design
It must be able to
Vmax=4.3V
provide sufficient
Vmin=3.3V
current up to 1.8A in a
Vnorm=3.8V
burst transmission.
Power supply for
Vnorm=1.8V external GPIO's pull up
I max=50mA circuits.
O
If unused, keep it open.
DC Characteristics
V max=2.1V
IH
V min=1.3V
IH
V max=0.5V
IL
V max=2.1V
IH
V min=1.3V
IH
V max=0.5V
IL
DC Characteristics
V min=1.35V
OH
V max=0.45V
OL
V min=1.35V
OH
V max=0.45V
OL
DC Characteristics
Vmax=5.25V
Vmin=3.0V
Vnorm=5.0V
LTE Module Series
Comment
The output voltage is
0.8V because of the
diode drop in the
Qualcomm chipset.
Pull-up to 1.8V
internally.
Activelow.
If unused,keep it
open.
Comment
1.8V power domain.
If unused, keep it
open.
1.8V power domain.
If unused, keep it
open.
Comment
Typical:5.0V
If unused,keep it
open.