Service Guide

LTE Standard Module Series
EG915U_Series_Hardware_Design 20 / 90
(U)SIM Interface
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
USIM1_VDD
43
PO
(U)SIM1 card power
supply
I
O
max = 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.
USIM1_DATA
45
DIO
(U)SIM1 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
USIM1_CLK
46
DO
(U)SIM1 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
USIM1_RST
44
DO
(U)SIM1 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
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 it
open.
USIM1_GND
47
-
Ground
-
Specified ground
for (U)SIM1 card