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 System description
Page 41 of 101
Reference
Description
Part Number - Manufacturer
C1, C2, C3, C4
47 pF Capacitor Ceramic COG 0402 5% 25 V
GRM1555C1H470JZ01 - Murata
C5
100 nF Capacitor Ceramic X7R 0402 10% 16 V
GRM155R71C104KA01 - Murata
D1, D2
ESD Transient Voltage Suppressor
USB0002RP or USB0002DP - AVX
J1
SIM Card Holder
Various Manufacturers,
C707-10M006-136-2 - Amphenol Corporation
Table 15: Example of components for SIM card connection
When connecting the module to a SIM card holder, perform the following steps on the application board:
Bypass digital noise via a 100 nF capacitor (e.g. Murata GRM155R71C104KA01) on the SIM supply (VSIM)
To prevent RF coupling, connect a 47 pF bypass capacitor (e.g. Murata GRM1555C1H470JZ01) at each SIM
signal (VSIM, SIM_CLK, SIM_IO, SIM_RST) to ground near the SIM connector
Mount very low capacitance ESD protection (e.g. Infineon ESD8V0L2B-03L or AVX USB0002RP) near the SIM
card connector
Limit capacitance and series resistance on each SIM signal to match the requirements for the SIM interface
(27.7 ns is the maximum allowed rise time on the SIM_CLK line, 1.0 µs is the maximum allowed rise time on
the SIM_IO and SIM_RST lines): always route the connections to keep them as short as possible
1.8.1 SIM functionality
The following SIM services are supported:
Abbreviated Dialing Numbers (ADN)
Fixed Dialing Numbers (FDN)
Last Dialed Numbers (LDN)
Service Dialing Numbers (SDN)
SIM Toolkit R96 is supported.
1.9 Serial Communication
1.9.1 Asynchronous serial interface (UART)
The UART interface is a 9-wire unbalanced asynchronous serial interface that provides an AT commands
interface, GPRS data and CSD data, software upgrades.
The UART interface provides RS-232 functionality conforming with ITU-T V.24 Recommendation [4], with CMOS
compatible signal levels: 0 V for low data bit or ON state, and 2.85 V for high data bit or OFF state. An external
voltage translator (Maxim MAX3237) is required to provide RS-232 compatible signal levels. For the detailed
electrical characteristics refer to the LEON-G100/G200 Data Sheet [1].
LEON-G100/G200 modules are designed to operate as a GSM/GPRS modem, which represents the data
circuit-terminating equipment (DCE) as described by the ITU-T V.24 Recommendation [4]. A customer application
processor connected to the module through the UART interface represents the data terminal equipment (DTE).
The signal names of the LEON-G100/G200 UART interface conform to ITU-T V.24 Recommendation [4].