User's Manual
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
- 4 Mechanical Dimensions, Mounting and Packaging
- 5 Regulatory and Type Approval Information
- 6 Document Information
- 7 Appendix
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ELS31-/ELS51-US Hardware Interface Overview
2.1 Application Interface
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ELS31-US_ELS51-US_HIO_v01.000a 2016-12-28
Confidential / Preliminary
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2.1.11 Control Signals
2.1.11.1 Status LED
The LED line can also be configured as GPO5 line, and can be used to drive a status LED that
indicates different operating modes of the module (for GPOs see Section 2.1.5). LED and GPO
functionality are mutually exclusive.
2.1.11.2 Fast Shutdown
The GPIO4 interface line can be configured as fast shutdown signal line FST_SHDN. The con-
figured FST_SHDN line is an active low control signal. If enabled, a low impulse of 10 millisec-
onds on the FST_SHDN line starts the fast shutdown procedure.The fast shutdown procedure
still finishes any data activities on the module‘s flash file system, thus ensuring data integrity,
but the module will no longer deregister gracefully from the network.