Integra M2106+
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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_DE_PTS_003-001
April, 2007
3.14
SIM Card Interface
Integra M2106+ has an embedded SIM reader. This embedded SIM interface is for 3 V / 1V8 micro-SIM
cards. If the application requires ISO SIM cards interface or 5 V SIM cards, the SIM interface signals are
available on the General Purpose Connector.
The Integra M2106+ Wireless CPU
®
SIM interface consists of 5 signals:
•
SIMVCC: SIM power supply
•
SIMRST:
Reset
•
SIMCLK:
Clock
•
SIMDATA: I/O port
•
SIMPRES1: SIM card presence detection
The SIM interface controls a 3V / 1V8 SIM (and a 5V SIM through an external SIM driver). This interface is
fully compliant with the GSM 11.11 recommendations concerning SIM functionality.
To be fully compliant with GSM 11.11 recommendations concerning SIM functions, please add shielding for
each SIM signals on the PCB
Electrical characteristics
Parameters
Conditions
Min
Typ
Max
Unit
SIM_DATA VIH
IIH =
±
20 µA
0.7xSIMVCC
V
SIM_DATA VIL
IIL = 1 mA
0.3xSIMVCC
V
SIM_RST,
SIM_CLK VOH
Source current = 20 µA
0.9xSIMVCC
V
SIM_DATA
Source current = 20 µA
0.8xSIMVCC
V
SIM_RST,
SIM_DATA,
SIM_CLK VOL
Sink current = -200 µA
0.4
V
SIMVCC = 2.9V
2.84
2.90
2.96
V
SIM_VCC*
Output Voltage
SIMVCC = 1.8V
1.77
1.8
1.86
V
SIM_CLK
Rise/Fall Time
Loaded with 30 pF
20
ns
SIM_RST,
Rise/Fall Time
Loaded with 30 pF
20
ns
SIM_DATA,
Rise/Fall Time
Loaded with 30 pF
0.7
µs
SIM_CLK
Frequency
3.25
MHz
* Given for a 3 V interface. An external level shifter is needed to handle 5 V SIMs.
Transient Voltage Suppressor diodes are internally added on the signals connected to the SIM socket in
order to prevent any damage by electrostatic discharge. 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.
