Integration Manual

LISA-U series - System Integration Manual
3G.G2-HW-10002-A3 Preliminary System description
Page 44 of 160
JESD22-A114F): higher protection level is required if the lines are connected to an SIM card connector,
since they are externally accessible on the application board.
For more details about the general precautions for ESD immunity about SIM interface pins please refer
to chapter 2.5.3.
Figure 21 shows an application circuit connecting the LISA-U series module and the SIM card placed in a SIM
card holder, using the SIM detection function provided by GPIO5 pin.
Note that, as defined by ETSI TS 102 221 or ISO/IEC 7816, SIM card contacts assignment is as follows:
 Contact C1 = VCC (Supply)  It must be connected to VSIM
 Contact C2 = RST (Reset)  It must be connected to SIM_RST
 Contact C3 = CLK (Clock)  It must be connected to SIM_CLK
 Contact C4 = AUX1 (Auxiliary contact for USB interface and other uses)  It must be left not connected
 Contact C5 = GND (Ground)  It must be connected to GND
 Contact C6 = VPP (Programming supply)  It must be connected to VSIM
 Contact C7 = I/O (Data input/output)  It must be connected to SIM_IO
 Contact C8 = AUX2 (Auxiliary contact for USB interface and other uses)  It must be left not connected
A SIM card can have 6 contacts (C1 = VCC, C2 = RST, C3 = CLK, C5 = GND, C6 = VPP, C7 = I/O) or 8 contacts
(providing also the auxiliary contacts C4 = AUX1 and C8 = AUX2). The contacts number depends if additional
features, that are not supported by the (U)SIM card interface of the LISA-U series modules, are provided by the
SIM card (contacts C4 = AUX1 and C8 = AUX2 for USB interfaces and other uses).
A SIM card holder can have 6 or 8 positions if a mechanical card presence detector is not provided, or it can
have 6+2 or 8+2 positions if two additional pins for the mechanical card presence detection are provided.
Figure 21 shows an application circuit connecting a LISA-U series module and a SIM card placed in a SIM card
holder with 6+2 pins (as the CCM03-3013LFT R102 connector, produced by C&K Components, which provides
2 pins for the mechanical card presence detection), using the SIM detection function provided by the GPIO5 of
LISA-U series module. This configuration allows the module to detect if a SIM card is present in the connector.
The SW1 and SW2 pins of the SIM card holder are connected to a normally-open mechanical switch integrated
in the SIM connector. The following cases are available
 SIM card not present: the GPIO5 signal is forced low by the pull-down resistor connected to ground (i.e. the
switch integrated in the SIM connector is open)
 SIM card present: the GPIO5 signal is forced high by the pull-up resistor connected to V_INT (i.e. the switch
integrated in the SIM connector is closed)
LISA-U series
C1
SIM CARD
HOLDER
CCVCC (C1)
CCVPP (C6)
CCIO (C7)
CCCLK (C3)
CCRST (C2)
GND (C5)
C2 C3 C5
D2 D3
C
5
C
6
C
7
C
1
C
2
C
3
SIM Card
Bottom View
(contacts side)
J1
50
VSIM
48
SIM_IO
47
SIM_CLK
49
SIM_RST
C4
SW1
SW2
4
V_INT
51
GPIO5
R2
R1
D1
Figure 21: SIM interface application circuit