External Sim Card Interface; This Document Is The Sole And Exclusive Property Of Wavecom. Not To Be Distributed Or Divulged Without Prior Written; Agreement - Wavecom Integra M2106+ Product Specification

3.14.2 External SIM Card Interface

The external SIM interface is available through the General Purpose Connector in order to use a stand-alone
SIM card holder. This interface is 3V / 1V8, but 5 V SIMs can be driven by using an external level shifter.
See the application schematics in section 6.3.
Each SIM line must not exceed a length of 10 cm on the application PCB.
Although an internal ESD protection inside the Integra M2106+, there is a certain distance between the
internal ESD protection circuitry and the external SIM card holder. This distance gives the electrostatic effect
to other digital signals around.
Wavecom recommends adding Transient Voltage Suppressor diodes (ESD diode) on the external SIM
signals, which are placed near to the external SIM socket. TVS diodes with low capacitance (less than
10 pF) are used on SIMCLK and SIMDATA to avoid any disturbance of the rising and falling edges.
Signal Pin #
SIM_CLK 45
SIM_RST 46
SIM_DATA 49
SIM_VCC 47
SIM_PRES 48
GPO0 50
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This document is the sole and exclusive property of Wavecom. Not to be distributed or divulged without prior written

agreement.

WA_DEV_M2106+_PTS_003-001
Pin description
I/O Reset state
O Output low
O Output low
I/O Output low
O --
I High Z
O Output high
Erreur ! Style non défini.
I/O type Description
2V9/1V8 SIM Clock
2V9/1V8 SIM Reset
2V9/1V8 SIM Data
2V9/1V8 SIM Power Supply
Supply
2V8 SIM Card Detect
CMOS
2V8 SIM 3 V or 5 V
3X
Integra M2106+
Page: 45 / 77
April, 2007