Service Guide

LTE Standard Module Series
EG91_Series_Hardware_Design
27
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USB_VBUS 8 AI
USB connection
detec
Vmax = 5.25 V
Vmin = 3.0 V
Vnom = 5.0 V
Typical value: 5.0 V
If unused, keep it open.
USB_DP 9 AIO
USB differential
data (+)
USB 2.0 compliant
Require differential
impedance of 90 Ω.
USB_DM 10 AIO
USB differential
data (-)
(U)SIM Interfaces
Pin Name
Pin
No.
I/O Description
DC
Characteristics
Comment
USIM_GND 47
Specified ground for
(U)SIM card
Connect to ground of
(U)SIM card connector.
USIM1_VDD 43 PO
(U)SIM1 card power
supply
I
O
max = 50 mA
For 1.8 V (U)SIM:
Vmax = 1.9 V
Vmin = 1.7 V
For 3.0 V (U)SIM:
Vmax = 3.05 V
Vmin = 2.7 V
Either 1.8 V or 3.0 V is
supported by the module
automatically.
USIM1_DATA 45 DIO (U)SIM1 card data
For 1.8 V (U)SIM:
V
IL
max = 0.6 V
V
IH
min = 1.2 V
V
OL
max = 0.45 V
V
OH
min = 1.35 V
For 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
For 1.8 V (U)SIM:
V
OL
max = 0.45 V
V
OH
min = 1.35 V
For 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
USIM1_
PRESENCE
42 DI
(U)SIM1 card
insertion detection
V
IL
min = -0.3 V
V
IL
max = 0.6 V
V
IH
min = 1.2 V
V
IH
max = 2.0 V
1.8 V power domain.
If unused, keep it open.