Specifications
Table Of Contents
- Contents
- Tables
- Figures
- 1 Introduction
- 2 Interface Characteristics
- 2.1 Application Interface
- 2.2 RF Antenna Interface
- 2.3 Sample Application
- 3 Operating Characteristics
- 3.1 Operating Modes
- 3.2 Power Up/Power Down Scenarios
- 3.3 Power Saving
- 3.4 Power Supply
- 3.5 Operating Temperatures
- 3.6 Electrostatic Discharge
- 3.7 Blocking against RF on Interface Lines
- 3.8 Reliability Characteristics
- 4 Mechanical Dimensions, Mounting and Packaging
- 5 Regulatory and Type Approval Information
- 6 Document Information
- 7 Appendix
Cinterion
®
ELS81-US Hardware Interface Description
1.2 ELS81-US System Overview
14
els81-us_hid_v01.004 2017-09-27
Confidential / Preliminary
Page 12 of 107
1.2 ELS81-US System Overview
Figure 1: ELS81-US system overview
GPIO
interface
I2C
USB
ASC0 lines
ASC1/SPI
CONTROL
RTC
POWER
Rx diversity
antenna
(UMTS/LTE)
Module
SIM interface
(with SIM detection)
SIM card
Application
Power supply
Backup supply
Emergency reset
ON
Serial interface/
SPI interface
Serial modem
interface lines
I2C
GPIO
3
4
4
5
2
9
1
1
1
2
USB
Rx diversity
1
Status LED
1
DAC (PWM) PWM
2
Fast
shutdown
Fast shutdown
1
1
COUNTER
Pulse counter
1
ASC0 lines
Serial modem
interface lines/
SPI interface
4
Main antenna
(UMTS/LTE)
Main antenna
1