Service Guide
Table Of Contents
- Safety Information
- About the Document
- Contents
- Table Index
- Figure Index
- 1 Introduction
- 2 Product Overview
- 3 Operating Characteristics
- 4 Application Interfaces
- 5 Antenna Interfaces
- 6 Reliability, Radio, and Electrical Characteristics
- 7 Mechanical Information
- 8 Storage, Manufacturing, and Packaging
- 9 Appendix References
LTE Standard Module Series
EG915U_Series_Hardware_Design 21 / 90
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 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
Main UART Interface
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
MAIN_CTS
36
DO
DTE clear to send signal
to DCE (connect to
DTE’s CTS)
V
OL
max = 0.45 V
V
OH
min = 1.35 V
1.8 V power
domain.
If unused, keep