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
2.1 Application Interface
53
els81-us_hid_v01.004 2017-09-27
Confidential / Preliminary
Page 29 of 107
The following figure shows the startup behavior of the asynchronous serial interface ASC1.
*) For pull-down values see Table 10.
Figure 9: ASC1 startup behavior
TXD1/GPIO17
RXD1/GPIO16
RTS1/GPIO18
CTS1/GPIO19
ON
EMERG_RST
PD
PD
PD
PD
Power supply active
Start up
Firmware
initialization
Command interface
initialization
Interface
active
Reset
state
V180
VCORE
PD