Service Guide

LTE Standard Module Series
EG915U_Series_Hardware_Design 17 / 81
If unused, keep it
open.
Power On/Off
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
PWRKEY
15
DI
Turn on/off the module
V
IL
max = 0.5 V
VBAT power
domain.
RESET_N
17
DI
Reset the module
VBAT power
domain.
If unused, keep it
open.
Indication Interfaces
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
STATUS
20
DO
Indicate the module's
operation status
V
OH
min = 1.35 V
V
OL
max = 0.45 V
1.8 V power
domain.
If unused, keep it
open
NET_STATUS
21
DO
Indicate the module's
network activity status
V
OH
min = 1.35 V
V
OL
max = 0.45 V
1.8 V power
domain.
If unused, keep it
open.
USB Interface
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
USB_VBUS
8
AI
USB connection detect
Vmax = 5.25 V
Vmin = 3.5 V
Vnom = 5.0 V
Typical: 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.
If unused, keep it
open.
USB_DM
10
AIO
USB differential data (-)
(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
For 1.8 V (U)SIM:
Vmax = 1.9 V
Either 1.8 V or
3.0 V (U)SIM
card is
supported and