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
3.2 Power Up/Power Down Scenarios
77
els81-us_hid_v01.004 2017-09-27
Confidential / Preliminary
Page 59 of 107
Figure 33: Automatic ON circuit based on voltage detector - option 2
3.2.2 Restart ELS81-US
After startup ELS81-US can be re-started as described in the following sections:
• Software controlled reset by AT+CFUN command: Starts Normal mode (see Section
3.2.2.1).
• Hardware controlled reset by EMERG_RST line: Starts Normal mode (see Section 3.2.2.2).
3.2.2.1 Restart ELS81-US via AT+CFUN Command
To reset and restart the ELS81-US module use the command AT+CFUN. See [1] for details.
Voltage Detector*
BATT+
BB
GND
ON
VDDLP
* It is recommended to apply the ultra-low current voltage
detector NCP303LSN28T1 manufactured by ON Semiconductor.
Details please refer to www.onsemi.com
Input
RESET
Output
GND
R1
10KOhm
21
3
0.1μF
GND
5 C
D