Quectel EG915U-EU - Page 21

LTE Standard Module Series
EG915U-EU_Hardware_Design 20 / 81
V
OL
max = 0.45 V
V
OH
min = 2.55 V
USIM1_DET
42
DI
(U)SIM1 card hot-plug
detect
V
IL
min = -0.3 V
V
IL
max = 0.6 V
V
IH
min = 1.26 V
V
IH
max = 2.0 V
1.8 V power
domain. If
unused, keep
this pin open
USIM1_GND
47
Specified ground
for (U)SIM1 card
USIM2_VDD*
87
PO
(U)SIM2 card power
supply
Iomax = 50 mA
1.8 V (U)SIM：
Vmax = 1.9 V
Vmin = 1.7 V
3.0 V (U)SIM：
Vmax = 3.05 V
Vmin = 2.7 V
Either 1.8 V or
3.0 V (U)SIM
card is
supported and
can be identified
automatically by
the module.
USIM2_DATA*
86
DIO
(U)SIM2 card data
1.8 V (U)SIM：
V
IL
max = 0.6 V
V
IH
min = 1.26 V
V
OL
max = 0.45 V
V
OH
min = 1.35 V
3.0 V (U)SIM：
V
IL
max = 1.0 V
V
IH
min = 1.95 V
V
OL
max = 0.45 V
V
OH
min = 2.55 V
USIM2_CLK*
84
DO
(U)SIM2 card clock
1.8 V (U)SIM：
V
OL
max = 0.45 V
V
OH
min = 1.35 V
3.0 V (U)SIM：
V
OL
max = 0.45 V
V
OH
min = 2.55 V
USIM2_RST*
85
DO
(U)SIM2 card reset
1.8 V (U)SIM：
V
OL
max = 0.45 V
V
OH
min = 1.35 V
3.0 V (U)SIM：
V
OL
max = 0.45 V
V
OH
min = 2.55 V
USIM2_DET*
83
DI
(U)SIM2 card detect
V
IL
min = -0.3 V
V
IL
max = 0.6 V
V
IH
min = 1.26 V
1.8 V power
domain. If
unused, keep