User's Manual
Table Of Contents
- Contents
- Tables
- Figures
- 1 Introduction
- 2 Interface Characteristics
- 2.1 Application Interface
- 2.1.1 Pad Assignment
- 2.1.2 Signal Properties
- 2.1.3 USB Interface
- 2.1.4 Serial Interface ASC0
- 2.1.5 Serial Interface ASC1
- 2.1.6 UICC/SIM/USIM Interface
- 2.1.7 Digital Audio Interface
- 2.1.8 Pulse Code Modulation Interface (PCM)
- 2.1.9 Inter IC Sound Interface (I2S)
- 2.1.10 GPIO Interface
- 2.1.11 I2C Interface
- 2.1.12 SPI Interface
- 2.1.13 Pulse Counter
- 2.1.14 HSIC Interface (ELS51-VA Only)
- 2.1.15 SDIO Interface (ELS51-VA Only)
- 2.1.16 Control Signals
- 2.2 RF Antenna Interface
- 2.3 Sample Application
- 2.1 Application Interface
- 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
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ELS31-VA/ELS51-VA Hardware Interface Description
3 Operating Characteristics
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ELS31-VA_ELS51-VA_HID_v01.000 2017-01-04
Confidential / Preliminary
Page 57 of 106
3 Operating Characteristics
3.1 Operating Modes
The table below briefly summarizes the various operating modes referred to throughout the
document.
Table 14: Overview of operating modes
Mode Function
Normal
opera-
tion
LTE IDLE No data transfer is in progress and the USB connection is suspended
by host (or is not present) and no active communication via ASC0/
ASC1. For power saving issues see Section 3.3. In IDLE mode, the
software can be active or in SLEEP state.
LTE DATA LTE data transfer in progress. Power consumption depends on network
settings and data transfer rate.
Power
Down
Normal shutdown after sending the power down command. Software is not active. Inter-
faces are not accessible. Operating voltage remains applied.
Airplane
mode
Airplane mode shuts down the radio part of the module, causes the module to log off from
the LTE network and disables all AT commands whose execution requires a radio connec-
tion.
Airplane mode can be controlled by AT command (see [1]).
In Airplane mode, the software can be active or in SLEEP state.