Quectel EG91 Series Hardware Design page 27

USIM1_RST 44
USIM1_
42
PRESENCE
USIM2_VDD 87
USIM2_DATA 86
USIM2_CLK 84
USIM2_RST 85
EG91_Hardware_Design
Reset signal of
DO
(U)SIMcard
(U)SIMcard
DI
insertion detection
Power supply for
PO
(U)SIMcard
Data signal of
IO
(U)SIMcard
Clock signal of
DO
(U)SIMcard
Reset signal of
DO
(U)SIMcard
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EG91 Hardware Design
For 1.8V (U)SIM:
V max=0.45V
OL
V min=1.35V
OH
For 3.0V (U)SIM:
V max=0.45V
OL
V min=2.55V
OH
V min=-0.3V
IL
V max=0.6V
IL
V min=1.2V
IH
V max=2.0V
IH
For 1.8V (U)SIM:
Vmax=1.9V
Vmin=1.7V
For 3.0V (U)SIM:
Vmax=3.05V
Vmin=2.7V
I max=50mA
O
For 1.8V (U)SIM:
V max=0.6V
IL
V min=1.2V
IH
V max=0.45V
OL
V min=1.35V
OH
For 3.0V (U)SIM:
V max=1.0V
IL
V min=1.95V
IH
V max=0.45V
OL
V min=2.55V
OH
For 1.8V (U)SIM:
V max=0.45V
OL
V min=1.35V
OH
For 3.0V (U)SIM:
V max=0.45V
OL
V min=2.55V
OH
For 1.8V (U)SIM:
V max=0.45V
OL
V min=1.35V
OH
For 3.0V (U)SIM:
V max=0.45V
OL
LTE Module Series
1.8V power domain.
If unused, keep it
open.
Either 1.8V or 3.0V is
supported by the
module automatically.