Q2406 Datasheet, PDF (24/81 Pages) List of Unclassifed Manufacturers – SELF CONTAINED E GSM/GPRS 900/1800 OR 850/1900 BI BAND MODULE

WM_PRJ_Q2400_PTS_002 - 002
24th January 2003
2.9.2 SIM socket connection
SIM socket pin description
Signal
Pin number
Description
VCC
1
SIMVCC
RST
2
SIMRST
CLK
3
SIMCLK
CC4
4
VCC module
GND
5
GROUND
VPP
6
Not connected
I/O
7
SIMDATA
CC8
8
SIMPRES with 100kΩ pull
down resistor
GND
SIMVCC
1 VCC
SIMRST
SIMCLK
2 _RST
3 _CLK
VCC
4 _CC4
C
5 _GND
SIMDATA
VPP
7
I/O
SIMPRES
470pf
100
kW
8 _CC8
GND
Figure 2 : SIM socket
The capacitor placed on the Sim Vcc must not exceed 470nF.
2.9.3 SIM 3/5V management
The WISMO Quik Q24x6 Series module is designed to interface with 3V SIMs
only².
Nevertheless, it is possible to manage 3V and 5V SIMs using an external level
shifter (see application notes in appendix). In this case, depending on the type
of SIM detected, the module firmware triggers the GPO0 output signal (pin
#26) in order to properly set the external SIM driver level (3V or 5V).
2 _{Most of the GSM operators have been providing 3V SIMs since 1998.}
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