Integration Guide
Table Of Contents
- Preface
- Contents
- 1 System description
- 1.1 Overview
- 1.2 Architecture
- 1.3 Pin-out
- 1.4 Operating modes
- 1.5 Power management
- 1.6 System functions
- 1.7 RF connection
- 1.8 SIM interface
- 1.9 Serial Communication
- 1.10 Audio
- 1.11 ADC input (LEON-G100 only)
- 1.12 General Purpose Input/Output (GPIO)
- 1.13 M2M Setup Schematic Example
- 1.14 Approvals
- 2 Design-In
- 3 Handling and soldering
- 4 Product Testing
- Appendix
- A Extra Features
- B Glossary
- Related documents
- Revision history
- Contact
LEON-G100/G200 - System Integration Manual
GSM.G1-HW-09002-F3 Preliminary Design-In
Page 88 of 101
A series ferrite bead (e.g. Murata BLM15HD182SN1) must be added on the line connected to the RESET_N
pin to avoid a module reset caused by an electrostatic discharge applied to the application board
It is recommended to keep the connection line to RESET_N as short as possible
Reset
push button
OUT
IN
LEON-G100/G200
12.6 k
1.88 V
22
RESET_N
OUT
IN
LEON-G100/G200
12.6 k
1.88 V
22
RESET_N
Application Processor
Ferrite Bead
Ferrite Bead
47 pF
47 pF
ESD
Figure 54: Application circuits to reset line for ESD immunity test
Sensitive interface is the SIM interface (VSIM pin, SIM_RST pin, SIM_IO pin, SIM_CLK pin):
A 47 pF bypass capacitor (e.g. Murata GRM1555C1H470J) have to be mounted on the lines connected to
VSIM, SIM_RST, SIM_IO and SIM_CLK to assure SIM interface functionality when an electrostatic discharge
is applied to the application board
It is suggested to use as short as possible connection lines at SIM pins
2.5.2 Antenna Interface Precautions
The antenna interface ANT pin could be involved in the ESD immunity test criticalness depending on the
application board handling. Antenna port precaution is herein suggested.
If the device implements an embedded antenna and the device insulating enclosure avoid air discharge up to
+8 kV / -8 kV to the antenna interface, no further precautions to ESD immunity test should be needed
If the device implements an external antenna and the antenna and its connecting cable are provided with
completely insulating enclosure to avoid air discharge up to +8 kV / -8 kV to the whole antenna and cable
surfaces, no further precautions to ESD immunity test should be needed
If the device implements an external antenna and the antenna or its connecting cable are not provided with
completely insulating enclosure to avoid air discharge up to +8 kV / -8 kV to the whole antenna and cable
surfaces, the following precautions to ESD immunity test should be implemented on the application board